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47 47

Combined fit to BaBar and Belle data on e+e- to pi+pi- psi(2S)

Sep 22, 2013 09/13

by Z. Q. Liu; X. S. Qin; C. Z. Yuan

eye 47

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A combined fit is performed to the BaBar and Belle measurements of the e+e- to pi+pi-psi(2S) cross sections for center-of-mass energy between threshold and 5.5 GeV. The resonant parameters of the Y(4360) and Y(4660) are determined. The mass is 4355^{+9}_{-10}\pm 9 MeV/c^2 and the width is 103^{+17}_{-15}\pm 11 MeV/c^2 for the Y(4360), and the mass is 4661^{+9}_{-8}\pm 6 MeV/c^2 and the width is 42^{+17}_{-12}\pm 6 MeV/c^2 for the Y(4660). The production of the Y(4260) in pi+pi-psi(2S) mode is...
Source: http://arxiv.org/abs/0805.3560v1

Arxiv.org

55 55

$Observation of new resonant structures in $γγ\to ω φ$, $φφ$ and $ωω$$

Observation of new resonant structures in $γγ\to ω φ$, $φφ$ and $ωω$

Sep 23, 2013 09/13

by Z. Q. Liu; C. P. Shen; C. Z. Yuan; T. Iijima; Belle Collaboration

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The processes $\gamma \gamma \to \omega \phi$, $\phi \phi$, and $\omega \omega$ are measured using an 870 fb$^{-1}$ data sample collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. Production of vector meson pairs is clearly observed and their cross sections are measured for masses that range from threshold to 4.0 GeV. In addition to signals from well established spin zero and spin two charmonium states, there are clear resonant structures below charmonium...
Source: http://arxiv.org/abs/1202.5632v2

Arxiv.org

50 50

Atomically flat interface between a single-terminated LaAlO3 substrate and SrTiO3 thin film is insulating

Sep 20, 2013 09/13

by Z. Q. Liu; Z. Huang; W. M. Lü; K. Gopinadhan; X. Wang; A. Annadi; T. Venkatesan; Ariando

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The surface termination of (100)-oriented LaAlO3 (LAO) single crystals was examined by atomic force microscopy and optimized to produce a single-terminated atomically flat surface by annealing. Then the atomically flat STO film was achieved on a single-terminated LAO substrate, which is expected to be similar to the n-type interface of two-dimensional electron gas (2DEG), i.e., (LaO)-(TiO2). Particularly, that can serve as a mirror structure for the typical 2DEG heterostructure to further...
Source: http://arxiv.org/abs/1205.1305v2

Arxiv.org

63 63

Magnetic-field induced resistivity minimum with in-plane linear magnetoresistance of the Fermi liquid in SrTiO3-x single crystals

Sep 21, 2013 09/13

by Z. Q. Liu; W. M. Lü; X. Wang; Z. Huang; A. Annadi; S. W. Zeng; T. Venkatesan; Ariando

eye 63

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We report novel magnetotransport properties of the low temperature Fermi liquid in SrTiO3-x single crystals. The classical limit dominates the magnetotransport properties for a magnetic field perpendicular to the sample surface and consequently a magnetic-field induced resistivity minimum emerges. While for the field applied in plane and normal to the current, the linear magnetoresistance (MR) starting from small fields ( < 0.5 T) appears. The large anisotropy in the transverse MRs reveals...
Source: http://arxiv.org/abs/1204.1901v1

Arxiv.org

4 4.0

Dominant role of oxygen vacancies in electrical properties of unannealed LaAlO3/SrTiO3 interfaces

Jun 30, 2018 06/18

by Z. Q. Liu; L. Sun; Z. Huang; C. J. Li; S. W. Zeng; K. Han; W. M. Lü; T Venkatesan; Ariando

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We report that in unannealed LaAlO3/SrTiO3 (LAO/STO) heterostructures the critical thickness for the appearance of the two-dimensional electron gas can be less than 4 unit cell (uc), the interface is conducting even for STO substrates with mixed terminations and the low-temperature resistance upturn in LAO/STO heterostructures with thick LAO layers strongly depends on laser fluence. Our experimental results provide fundamental insights into the different roles played by oxygen vacancies and...
Topics: Materials Science, Strongly Correlated Electrons, Condensed Matter
Source: http://arxiv.org/abs/1401.4991

Arxiv.org

54 54

Metallic state in La-doped YBa$_2$Cu$_3$O$_y$ thin films with $n$-type charge carriers

Sep 20, 2013 09/13

by S. W. Zeng; X. Wang; W. M. Lü; Z. Huang; M. Motapothula; Z. Q. Liu; Y. L. Zhao; A. Annadi; S. Dhar; H. Mao; W. Chen; T. Venkatesan; Ariando

eye 54

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We report hole and electron doping in La-doped YBa$_2$Cu$_3$O$_y$(YBCO) thin films synthesized by pulsed laser deposition technique and subsequent \emph{in-situ} postannealing in oxygen ambient and vaccum. The $n$-type samples show a metallic behavior below the Mott limit and a high carrier density of $\sim2.8$ $\times$ 10$^{21}$ cm$^{-3}$ at room temperature (\emph{T}) at the optimally reduced condition. The in-plane resistivity ($\rho$$_{ab}$) of the $n$-type samples exhibits a quadratic...
Source: http://arxiv.org/abs/1207.5914v1

Arxiv.org

70 70

Carrier freeze-out induced metal-insulator transition in oxygen deficient SrTiO3 films

Sep 18, 2013 09/13

by Z. Q. Liu; D. P. Leusink; X. Wang; W. M. Lü; K. Gopinadhan; A. Annadi; Y. L. Zhao; X. H. Huang; S. W. Zeng; Z. Huang; A. Srivastava; S. Dhar; T. Venkatesan; Ariando

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We report the optical, electrical transport, and magnetotransport properties of high quality oxygen deficient SrTiO3 (STO) single crystal film fabricated by pulsed laser deposition and reduced in the vacuum chamber. The oxygen vacancy distribution in the thin film is expected to be uniform. By comparing the electrical properties with oxygen deficient bulk STO, it was found that the oxygen vacancies in bulk STO is far from uniform over the whole material. The metal-insulator transition (MIT)...
Source: http://arxiv.org/abs/1102.5595v2

Arxiv.org

19 19

Full Electroresistance Modulation in a Mixed-Phase Metallic Alloy

Jun 30, 2018 06/18

by Z. Q. Liu; L. Li; Z. Gai; J. D. Clarkson; S. L. Hsu; A. T. Wong; L. S. Fan; M. -W. Lin; C. M. Rouleau; T. Z. Ward; H. N. Lee; A. S. Sefat; H. M. Christen; R. Ramesh

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We report a giant, ~22%, electroresistance modulation for a metallic alloy above room temperature. It is achieved by a small electric field of 2 kV/cm via piezoelectric strain-mediated magnetoelectric coupling and the resulting magnetic phase transition in epitaxial FeRh/BaTiO3 heterostructures. This work presents detailed experimental evidence for an isothermal magnetic phase transition driven by tetragonality modulation in FeRh thin films, which is in contrast to the large volume expansion in...
Topics: Materials Science, Condensed Matter
Source: http://arxiv.org/abs/1702.04306

Arxiv.org

53 53

Reversible metal-insulator transition in LaAlO3 thin films mediated by intragap defects: An alternative mechanism for resistive switching

Sep 23, 2013 09/13

by Z. Q. Liu; D. P. Leusink; W. M. Lü; X. Wang; X. P. Yang; K. Gopinadhan; Y. T. Lin; A. Annadi; Y. L. Zhao; A. Roy Barman; S. Dhar; Y. P. Feng; H. B. Su; G. Xiong; T. Venkatesan; Ariando

eye 53

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We report on the electric-field-induced reversible metal-insulator transition (MIT) of the insulating LaAlO3 thin films observed in metal/LaAlO3/Nb-SrTiO3 heterostructures. The switching voltage depends strongly on the thickness of the LaAlO3 thin film which indicates that a minimum thickness is required for the MIT. A constant opposing voltage is required to deplete the charges from the defect states. Our experimental results exclude the possibility of diffusion of the metal electrodes or...
Source: http://arxiv.org/abs/1110.1595v1

Arxiv.org

81 81

Observation of ψ(4040) and ψ(4160) decay into ηJ/ψ

Sep 22, 2013 09/13

by Belle Collaboration; X. L. Wang; Y. L. Han; C. Z. Yuan; C. P. Shen; P. Wang; I. Adachi; H. Aihara; D. M. Asner; V. Aulchenko; T. Aushev; T. Aziz; A. M. Bakich; Y. Ban; B. Bhuyan; G. Bonvicini; A. Bozek; M. Bracko; J. Brodzicka; O. Brovchenko; T. E. Browder; P. Chen; B. G. Cheon; K. Cho; S. -K. Choi; Y. Choi; J. Dalseno; Z. Dolezal; Z. Drásal; S. Eidelman; S. Esen; H. Farhat; J. E. Fast; V. Gaur; R. Gillard; Y. M. Goh; B. Golob; H. Hayashii; Y. Hoshi; W. -S. Hou; H. J. Hyun; K. Inami; A....

eye 81

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The cross section for e^+e^- \to \eta J/\psi between \sqrt{s}=3.8 GeV/c^2 and 5.3 GeV/c^2 is measured via initial state radiation using 980 fb^{-1} of data on and around the \Upsilon(nS)(n=1,2,3,4,5) resonances collected with the Belle detector at KEKB. Two resonant structures at the \psi(4040) and \psi(4160) are observed in the \eta J/\psi invariant mass distribution. Fitting the mass spectrum with the coherent sum of two Breit-Wigner functions, one obtains BR(\psi(4040)\to\eta...
Source: http://arxiv.org/abs/1210.7550v2

Arxiv.org

54 54

Search for CP Violation in D Meson Decays to phi pi+

Sep 23, 2013 09/13

by Belle Collaboration; M. Starič; H. Aihara; K. Arinstein; D. M. Asner; T. Aushev; A. M. Bakich; A. Bay; V. Bhardwaj; B. Bhuyan; A. Bozek; M. Bračko; T. E. Browder; A. Chen; P. Chen; B. G. Cheon; K. Chilikin; R. Chistov; I. -S. Cho; K. Cho; Y. Choi; Z. Doležal; Z. Drásal; S. Eidelman; J. E. Fast; V. Gaur; N. Gabyshev; B. Golob; J. Haba; K. Hayasaka; Y. Horii; Y. Hoshi; W. -S. Hou; Y. B. Hsiung; T. Iijima; K. Inami; A. Ishikawa; R. Itoh; M. Iwabuchi; Y. Iwasaki; T. Iwashita; T. Julius; J. H....

eye 54

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We search for CP violation in Cabibbo-suppressed charged D meson decays by measuring the difference between the CP violating asymmetries for the Cabibbo-suppressed decays D+ -> K+K-pi+ and the Cabibbo-favored decays Ds -> K+K-pi+ in the K+K- mass region of the phi resonance. Using 955/fb of data collected with the Belle detector we obtain A_CP(D+ -> phi pi+) = (+0.51 +- 0.28 +- 0.05)%. The measurement improves the sensitivity of previous searches by more than a factor of five. We find...
Source: http://arxiv.org/abs/1110.0694v2

Arxiv.org

34 34

$Study of the Hadronic Transitions $Υ$(2S)$\rightarrow (η,π^0)Υ$(1S) at Belle$

Study of the Hadronic Transitions $Υ$(2S)$\rightarrow (η,π^0)Υ$(1S) at Belle

Sep 22, 2013 09/13

by Belle Collaboration; U. Tamponi; R. Mussa; I. Adachi; H. Aihara; D. M. Asner; V. Aulchenko; T. Aushev; A. M. Bakich; M. Barrett; B. Bhuyan; A. Bondar; A. Bozek; M. Bra\v; T. E. Browder; A. Chen; P. Chen; B. G. Cheon; K. Chilikin; I. -S. Cho; K. Cho; Y. Choi; J. Dalseno; Z. Dole\v; Z. Drásal; D. Dutta; S. Eidelman; D. Epifanov; S. Esen; H. Farhat; J. E. Fast; A. Frey; V. Gaur; R. Gillard; Y. M. Goh; B. Golob; K. Hayasaka; Y. Horii; Y. Hoshi; H. J. Hyun; T. Iijima; A. Ishikawa; Y. Iwasaki; I....

eye 34

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We study the rare hadronic transitions $\Upsilon(2S)\rightarrow \Upsilon(1S)\eta$ and $\Upsilon(2S)\rightarrow \Upsilon(1S)\pi^0$ using a sample of 158 $\times 10^6$ $\Upsilon(2S)$ decays collected with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. We observe the $\eta$ meson decay to $\gamma\gamma$ and $\pi^+\pi^-\pi^0$ final states; the $\Upsilon(1S)$ is reconstructed in the $\mu^+\mu^-$ and $e^+e^-$ decay modes. We measure the ratios of branching fractions (${\mathcal...
Source: http://arxiv.org/abs/1210.6914v1

Arxiv.org

87 87

Precision measurement of charged pion and kaon differential cross sections in electron-positron annihilation at Q = 10.52 GeV

Sep 21, 2013 09/13

by Belle Collaboration; M. Leitgab; R. Seidl; M. Grosse Perdekamp; A. Vossen; I. Adachi; H. Aihara; D. M. Asner; V. Aulchenko; T. Aushev; A. M. Bakich; B. Bhuyan; A. Bondar; A. Bozek; M. Bračko; J. Brodzicka; T. E. Browder; V. Chekelian; A. Chen; P. Chen; B. G. Cheon; K. Chilikin; K. Cho; V. Chobanova; Y. Choi; D. Cinabro; J. Dalseno; Z. Drásal; D. Dutta; S. Eidelman; D. Epifanov; H. Farhat; J. E. Fast; V. Gaur; N. Gabyshev; R. Gillard; F. Giordano; Y. M. Goh; B. Golob; J. Haba; K. Hayasaka; H....

eye 87

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Measurements of inclusive differential cross sections for charged pion and kaon production in electron-positron annihilation have been carried out at a center-of-mass energy of Q = 10.52 GeV. The measurements were performed with the Belle detector at the KEKB electron-positron collider using a data sample containing 113 million e+e- -> qqbar events, where q={u,d,s,c}. We present charge-integrated differential cross sections d\sigma_h+-/dz for h+- = pi+-, K+- as a function of the relative...
Source: http://arxiv.org/abs/1301.6183v3

Arxiv.org

49 49

$Search for the decay $B^0\to DK^{*0}$ followed by $D\to K^-π^+$$

Search for the decay $B^0\to DK^{*0}$ followed by $D\to K^-π^+$

Sep 20, 2013 09/13

by The Belle Collaboration; K. Negishi; Y. Horii; Y. Onuki; T. Sanuki; H. Yamamoto; I. Adachi; H. Aihara; D. M. Asner; T. Aushev; A. M. Bakich; Y. Ban; K. Belous; B. Bhuyan; A. Bondar; T. E. Browder; M. -C. Chang; A. Chen; P. Chen; B. G. Cheon; K. Chilikin; R. Chistov; I. -S. Cho; K. Cho; Y. Choi; J. Dalseno; Z. Doležal; Z. Drásal; A. Drutskoy; S. Eidelman; J. E. Fast; V. Gaur; N. Gabyshev; Y. M. Goh; J. Haba; H. Hayashii; Y. Hoshi; W. -S. Hou; H. J. Hyun; T. Iijima; K. Inami; A. Ishikawa; R....

eye 49

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We report a study of the decay $B^0\rightarrow D K^+\pi^-$ followed by $D\rightarrow K^-\pi^+$, where $D$ indicates $D^0$ or $\bar{D}^0$. We reconstruct the $D K^+\pi^-$ state in a phase space corresponding to $D K^{*}(892)^0$. The CP-violating angle $\phi_3$ affects its decay rate via the interference between $b\rightarrow u$ and $b\rightarrow c$ transitions. The result is obtained from a 711 ${\rm fb}^{-1}$ data sample that contains 772 $\times 10^6 B\bar{B}$ pairs collected at the...
Source: http://arxiv.org/abs/1205.0422v1

Arxiv.org

52 52

Measurement of Branching Fraction and First Evidence of CP Violation in B0 --> a1+-(1260) pi-+ Decays

Sep 20, 2013 09/13

by Belle Collaboration; J. Dalseno; I. Adachi; H. Aihara; D. M. Asner; V. Aulchenko; T. Aushev; A. M. Bakich; A. Bay; K. Belous; B. Bhuyan; A. Bozek; M. Bračko; O. Brovchenko; T. E. Browder; V. Chekelian; A. Chen; P. Chen; B. G. Cheon; K. Chilikin; R. Chistov; I. -S. Cho; K. Cho; Y. Choi; Z. Doležal; Z. Drásal; S. Eidelman; J. E. Fast; V. Gaur; N. Gabyshev; A. Garmash; Y. M. Goh; H. Hayashii; Y. Horii; Y. Hoshi; W. -S. Hou; Y. B. Hsiung; H. J. Hyun; T. Iijima; K. Inami; A. Ishikawa; R. Itoh; M....

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We present a measurement of the branching fraction and time-dependent CP violation parameters in B0 --> a_1^+-(1260) pi^-+ decays. The results are obtained from the final data sample containing 772x10^6 BBbar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^+e^- collider. We also measure an upper limit on the product branching fraction for a possible decay with the same final state B0 --> a_2^+-(1320) pi^-+. In a time-dependent...
Source: http://arxiv.org/abs/1205.5957v2

Arxiv.org

47 47

First observation of exclusive $Υ(1S)$ and $Υ(2S)$ decays into light hadrons

Sep 20, 2013 09/13

by Belle Collaboration; C. P. Shen; C. Z. Yuan; T. Iijima; I. Adachi; H. Aihara; D. M. Asner; T. Aushev; A. M. Bakich; A. Bay; K. Belous; B. Bhuyan; M. Bischofberger; G. Bonvicini; A. Bozek; M. Bračko; T. E. Browder; M. -C. Chang; P. Chang; A. Chen; P. Chen; B. G. Cheon; K. Chilikin; R. Chistov; I. -S. Cho; K. Cho; S. -K. Choi; Y. Choi; J. Dalseno; Z. Doležal; Z. Drásal; S. Eidelman; J. E. Fast; V. Gaur; N. Gabyshev; Y. M. Goh; B. Golob; J. Haba; H. Hayashii; Y. Horii; Y. Hoshi; W. -S. Hou; Y....

eye 47

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Using samples of 102 million $\Upsilon(1S)$ and 158 million $\Upsilon(2S)$ events collected with the Belle detector, we study exclusive hadronic decays of these two bottomonium resonances to the three-body final states $\phi K^+ K^-$, $\omega \pi^+ \pi^-$ and $K^{\ast 0}(892) K^- \pi^+ $, and to the two-body Vector-Tensor ($\phi f_2'(1525)$, $\omega f_2(1270)$, $\rho a_2(1320)$ and $K^{\ast 0}(892) \bar{K}_2^{\ast 0}(1430) $) and Axial-vector-Pseudoscalar ($K_1(1270)^+ K^-$, $K_1(1400)^+ K^- $...
Source: http://arxiv.org/abs/1205.1246v2

Arxiv.org

100 100

$Measurement of $B^0 \to J/ψη^{(}{}'{}^{)}$ and Constraint on the $η-η'$ Mixing Angle$

Measurement of $B^0 \to J/ψη^{(}{}'{}^{)}$ and Constraint on the $η-η'$ Mixing Angle

Sep 17, 2013 09/13

by M. -C. Chang; Y. -C. Duh; J. -Y. Lin; I. Adachi; K. Adamczyk; H. Aihara; D. M. Asner; T. Aushev; A. M. Bakich; V. Bhardwaj; B. Bhuyan; A. Bondar; A. Bozek; M. Bracko; J. Brodzicka; T. E. Browder; P. Chang; A. Chen; K. -F. Chen; P. Chen; B. G. Cheon; K. Chilikin; R. Chistov; I. -S. Cho; S. -K. Choi; Y. Choi; J. Dalseno; Z. Dolezal; Z. Drasal; A. Drutskoy; S. Eidelman; J. E. Fast; V. Gaur; A. Garmash; Y. M. Goh; B. Golob; J. Haba; T. Hara; K. Hayasaka; H. Hayashii; Y. Horii; Y. Hoshi; W. -S. Hou;...

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We measure the branching fractions of $B^{0} \to J/\psi \eta^{(}{}'{}^{)}$ decays with the complete Belle data sample of $772 \times 10^{6}$ $B\bar{B}$ events collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. The results for the branching fractions are: ${\cal B}(B^{0} \to J/\psi \eta)=(12.3 \pm ^{1.8}_{1.7} \pm 0.7) \times 10^{-6}$ and ${\cal B}(B^{0} \to J/\psi\eta') < 7.4 \times 10^{-6}$ at 90% confidence level. The...
Source: http://arxiv.org/abs/1203.3399v1

Arxiv.org

108 108

$Evidence for CP Violation in the Decay $D^+\rightarrow K^0_Sπ^+$$

Evidence for CP Violation in the Decay $D^+\rightarrow K^0_Sπ^+$

Sep 17, 2013 09/13

by B. R. Ko; E. Won; I. Adachi; H. Aihara; D. M. Asner; V. Aulchenko; T. Aushev; T. Aziz; A. M. Bakich; K. Belous; V. Bhardwaj; B. Bhuyan; M. Bischofberger; A. Bondar; G. Bonvicini; A. Bozek; M. Bra\v; T. E. Browder; M. -C. Chang; A. Chen; P. Chen; B. G. Cheon; K. Chilikin; I. -S. Cho; K. Cho; Y. Choi; Z. Dole\v; Z. Drásal; S. Eidelman; J. E. Fast; V. Gaur; N. Gabyshev; Y. M. Goh; B. Golob; J. Haba; K. Hayasaka; H. Hayashii; Y. Horii; Y. Hoshi; W. -S. Hou; H. J. Hyun; T. Iijima; A. Ishikawa; R....

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We observe evidence for CP violation in the decay $D^+\rightarrow K^0_S\pi^+$ using a data sample with an integrated luminosity of 977 fb$^{-1}$ collected by the Belle detector at the KEKB $e^+e^-$ asymmetric-energy collider. The CP asymmetry in the decay is measured to be $(-0.363\pm0.094\pm0.067)%$, which is 3.2 standard deviations away from zero, and is consistent with the expected CP violation due to the neutral kaon in the final state.
Source: http://arxiv.org/abs/1203.6409v4

Arxiv.org

5 5.0

$Updated Cross Section Measurement of $e^+ e^- \to K^+ K^- J/\psi$ and $K_S^0K_S^0J/\psi$ via Initial State Radiation at Belle$

Updated Cross Section Measurement of $e^+ e^- \to K^+ K^- J/\psi$ and $K_S^0K_S^0J/\psi$ via Initial State Radiation at Belle

Jun 30, 2018 06/18

by Belle Collaboration; C. P. Shen; C. Z. Yuan; P. Wang; A. Abdesselam; I. Adachi; H. Aihara; S. Al Said; D. M. Asner; V. Aulchenko; T. Aushev; O. Nitoh; S. Okuno; C. W. Park; H. Park; T. K. Pedlar; R. Pestotnik; M. Petrič; L. E. Piilonen; M. Ritter; M. Röhrken; R. Ayad; A. Rostomyan; S. Ryu; T. Saito; Y. Sakai; T. Sanuki; Y. Sato; O. Schneider; G. Schnell; D. Semmler; K. Senyo; A. M. Bakich; O. Seon; M. E. Sevior; M. Shapkin; V. Shebalin; T. -A. Shibata; J. -G. Shiu; B. Shwartz; A. Sibidanov;...

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The cross sections of the processes $e^+ e^- \to K^+ K^- J/\psi$ and $K_S^0K_S^0J/\psi$ are measured via initial state radiation at center-of-mass energies between the threshold and 6.0~GeV using a data sample of 980~fb$^{-1}$ collected with the Belle detector on or near the $\Upsilon(nS)$ resonances, where $n=$1, 2, ..., 5. The cross sections for $e^+ e^- \to K^+ K^- J/\psi$ are at a few pb level and the average cross section for $e^+ e^- \to K_S^0K_S^0J/\psi$ is $1.8\pm 0.6 (\rm stat.)\pm 0.3...
Topic: High Energy Physics - Experiment
Source: http://arxiv.org/abs/1402.6578

Arxiv.org

42 42

Measurement of gamma gamma* --> pi0 transition form factor at Belle

Sep 20, 2013 09/13

by The Belle Collaboration; S. Uehara; Y. Watanabe; H. Nakazawa; I. Adachi; H. Aihara; D. M. Asner; T. Aushev; A. M. Bakich; K. Belous; V. Bhardwaj; B. Bhuyan; M. Bischofberger; A. Bondar; G. Bonvicini; A. Bozek; M. Bracko; T. E. Browder; M. -C. Chang; A. Chen; P. Chen; B. G. Cheon; K. Chilikin; I. -S. Cho; K. Cho; Y. Choi; J. Dalseno; Z. Dolezal; Z. Drasal; S. Eidelman; D. Epifanov; J. E. Fast; M. Feindt; V. Gaur; N. Gabyshev; Y. M. Goh; B. Golob; J. Haba; K. Hayasaka; H. Hayashii; Y. Horii; Y....

eye 42

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We report a measurement of the process gamma gamma* --> pi0 with a 759 fb^{-1} data sample recorded with the Belle detector at the KEKB asymmetric-energy e+e- collider. The pion transition form factor, F(Q^2), is measured for the kinematical region 4 GeV^2
Source: http://arxiv.org/abs/1205.3249v2

Arxiv.org

45 45

$First observation of CP violation and improved measurement of the branching fraction and polarization of B0 -> D*+ D*- decays$

First observation of CP violation and improved measurement of the branching fraction and polarization of B0 -> D*+ D*- decays

Sep 20, 2013 09/13

by Belle Collaboration; B. Kronenbitter; I. Adachi; H. Aihara; K. Arinstein; D. M. Asner; T. Aushev; T. Aziz; A. M. Bakich; M. Barrett; K. Belous; V. Bhardwaj; B. Bhuyan; A. Bondar; A. Bozek; M. Bračko; O. Brovchenko; T. E. Browder; V. Chekelian; A. Chen; P. Chen; B. G. Cheon; R. Chistov; I. -S. Cho; K. Cho; Y. Choi; J. Dalseno; Z. Doležal; Z. Drásal; A. Drutskoy; S. Eidelman; S. Esen; J. E. Fast; M. Feindt; V. Gaur; N. Gabyshev; Y. M. Goh; J. Haba; H. Hayashii; Y. Horii; Y. Hoshi; W. -S. Hou;...

eye 45

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We report the measurement of the branching fraction, the polarization, and the parameters of the time-dependent CP violation in B0 -> D*+ D*- decays using a data sample of 772 million BB pairs, collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain a branching fraction of B = (7.82 +- 0.38 +- 0.63) x10^{-4}, a CP-odd fraction of R_\perp = 0.138 +- 0.024 +- 0.006 and, additionally, a fraction of the longitudinal component in the...
Source: http://arxiv.org/abs/1207.5611v2

Arxiv.org

74 74

First Measurement of phi_3 with a Model-independent Dalitz Plot Analysis of B->DK, D->KsPiPi Decay

Sep 21, 2013 09/13

by Belle collaboration; H. Aihara; K. Arinstein; D. M. Asner; V. Aulchenko; T. Aushev; A. M. Bakich; K. Belous; B. Bhuyan; M. Bischofberger; A. Bondar; G. Bonvicini; A. Bozek; M. Bračko; T. E. Browder; M. -C. Chang; P. Chang; B. G. Cheon; K. Chilikin; R. Chistov; K. Cho; Y. Choi; J. Dalseno; Z. Doležal; A. Drutskoy; S. Eidelman; D. Epifanov; J. E. Fast; M. Feindt; V. Gaur; N. Gabyshev; A. Garmash; Y. M. Goh; B. Golob; J. Haba; H. Hayashii; Y. Horii; Y. Hoshi; W. -S. Hou; Y. B. Hsiung; H. J....

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We present the first measurement of the angle phi_3 of the Unitarity Triangle using a model-independent Dalitz plot analysis of B->DK, D->KsPiPi decays. The method uses an input measurements of the strong phase of the D->KsPiPi amplitude from the CLEO collaboration. The result is based on the full data set of 772x10^6 BBbar pairs collected by the Belle experiment at the Upsilon(4S) resonance. We obtain phi_3 = (77.3^{+15.1}_{-14.9} +- 4.1 +- 4.3)^{\circ} and the suppressed amplitude...
Source: http://arxiv.org/abs/1204.6561v2

Arxiv.org

78 78

$Measurements of Branching Fractions and Time-dependent CP Violating Asymmetries in $B^{0} \to D^{(*)\pm}D^{\mp}$ Decays$

Measurements of Branching Fractions and Time-dependent CP Violating Asymmetries in $B^{0} \to D^{(*)\pm}D^{\mp}$ Decays

Sep 17, 2013 09/13

by Belle Collaboration; M. Röhrken; I. Adachi; H. Aihara; D. M. Asner; V. Aulchenko; T. Aushev; A. M. Bakich; M. Barrett; K. Belous; V. Bhardwaj; B. Bhuyan; M. Bischofberger; A. Bondar; G. Bonvicini; A. Bozek; M. Bračko; O. Brovchenko; T. E. Browder; M. -C. Chang; A. Chen; P. Chen; B. G. Cheon; K. Chilikin; I. -S. Cho; K. Cho; Y. Choi; J. Dalseno; Z. Doležal; Z. Drásal; A. Drutskoy; S. Eidelman; J. E. Fast; M. Feindt; V. Gaur; N. Gabyshev; A. Garmash; Y. M. Goh; J. Haba; H. Hayashii; Y. Horii;...

eye 78

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We report measurements of branching fractions and time-dependent CP asymmetries in $B^{0} \to D^{+}D^{-}$ and $B^{0} \to D^{*\pm}D^{\mp}$ decays using a data sample that contains $(772 \pm 11)\times 10^6 B\bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. We determine the branching fractions to be $\mathcal{B}(B^{0} \to D^{+}D^{-})=(2.12 \pm 0.16 \pm 0.18)\times 10^{-4}$ and $\mathcal{B}(B^{0} \to...
Source: http://arxiv.org/abs/1203.6647v2

Arxiv.org

48 48

Measurement of the CP-violation Parameter sin2$φ_1$ with a New Tagging Method at the $Υ(5S)$ Resonance

Sep 18, 2013 09/13

by Belle Collaboration; Y. Sato; H. Yamamoto; H. Aihara; D. M. Asner; V. Aulchenko; T. Aushev; T. Aziz; A. M. Bakich; V. Bhardwaj; B. Bhuyan; M. Bischofberger; A. Bondar; A. Bozek; M. Bračko; T. E. Browder; P. Chang; P. Chen; B. G. Cheon; K. Chilikin; R. Chistov; I. -S. Cho; K. Cho; S. -K. Choi; Y. Choi; J. Dalseno; Z. Doležal; Z. Drásal; S. Eidelman; D. Epifanov; J. E. Fast; V. Gaur; N. Gabyshev; Y. M. Goh; B. Golob; J. Haba; T. Hara; K. Hayasaka; H. Hayashii; Y. Horii; Y. Hoshi; W. -S. Hou;...

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We report a measurement of the CP-violation parameter sin2$\phi_1$ at the $\Upsilon(5S)$ resonance using a new tagging method, called "$B$-$\pi$ tagging." In $\Upsilon(5S)$ decays containing a neutral $B$ meson, a charged $B$, and a charged pion, the neutral $B$ is reconstructed in the $J/\psi K_S^0$ CP-eigenstate decay channel. The initial flavor of the neutral $B$ meson at the moment of the $\Upsilon(5S)$ decay is opposite to that of the charged $B$ and may thus be inferred from the...
Source: http://arxiv.org/abs/1201.3502v3

Arxiv.org

15 15

$Observation of $D^0-\bar{D}^0$ Mixing in $e^+e^-$ Collisions$

Observation of $D^0-\bar{D}^0$ Mixing in $e^+e^-$ Collisions

Jun 30, 2018 06/18

by B. R. Ko; E. Won; I. Adachi; H. Aihara; K. Arinstein; D. M. Asner; V. Aulchenko; T. Aushev; A. Bala; V. Bhardwaj; B. Bhuyan; G. Pakhlova; C. W. Park; H. K. Park; T. K. Pedlar; T. Peng; M. Petrič; L. E. Piilonen; M. Ritter; M. Röhrken; A. Rostomyan; A. Bobrov; S. Ryu; H. Sahoo; Y. Sakai; L. Santelj; T. Sanuki; V. Savinov; O. Schneider; G. Schnell; C. Schwanda; A. J. Schwartz; A. Bondar; R. Seidl; O. Seon; M. E. Sevior; M. Shapkin; C. P. Shen; T. -A. Shibata; J. -G. Shiu; B. Shwartz; A....

eye 15

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We observe $D^0-\bar{D}^0$ mixing in the decay $D^0\rightarrow K^+\pi^-$ using a data sample of integrated luminosity 976 fb$^{-1}$ collected with the Belle detector at the KEKB $e^+e^-$ asymmetric-energy collider. We measure the mixing parameters ${x'}^2 = (0.09\pm0.22)\times 10^{-3}$ and $y' = (4.6\pm3.4)\times 10^{-3}$ and the ratio of doubly Cabibbo-suppressed to Cabibbo-favored decay rates $R_D = (3.53\pm0.13)\times 10^{-3}$, where the uncertainties are statistical and systematic combined....
Topic: High Energy Physics - Experiment
Source: http://arxiv.org/abs/1401.3402

Arxiv.org

9 9.0

$Measurement of the Lepton Forward-Backward Asymmetry in $B \rightarrow X_s \ell^+ \ell^-$ Decays with a Sum of Exclusive Modes$

Measurement of the Lepton Forward-Backward Asymmetry in $B \rightarrow X_s \ell^+ \ell^-$ Decays with a Sum of Exclusive Modes

Jun 30, 2018 06/18

by Y. Sato; A. Ishikawa; H. Yamamoto; A. Abdesselam; I. Adachi; K. Adamczyk; H. Aihara; D. M. Asner; V. Aulchenko; T. Aushev; R. Ayad; S. Nishida; O. Nitoh; S. Ogawa; P. Pakhlov; H. Park; H. K. Park; T. K. Pedlar; T. Peng; R. Pestotnik; M. Petri\v; A. M. Bakich; L. E. Piilonen; E. Ribe\v; M. Ritter; M. Röhrken; A. Rostomyan; H. Sahoo; T. Saito; Y. Sakai; S. Sandilya; D. Santel; A. Bala; L. Santelj; T. Sanuki; V. Savinov; O. Schneider; G. Schnell; C. Schwanda; A. J. Schwartz; R. Seidl; D. Semmler;...

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We report the first measurement of the lepton forward-backward asymmetry ${\cal A}_{\rm FB}$ as a function of the squared four-momentum of the dilepton system, $q^2$, for the electroweak penguin process $B \rightarrow X_s \ell^+ \ell^-$ with a sum of exclusive final states, where $\ell$ is an electron or a muon and $X_s$ is a hadronic recoil system with an $s$ quark. The results are based on a data sample containing $772\times10^6$ $B\bar{B}$ pairs recorded at the $\Upsilon(4S)$ resonance with...
Topic: High Energy Physics - Experiment
Source: http://arxiv.org/abs/1402.7134

Arxiv.org

5 5.0

Amplitude analysis of e+e- => Y(nS)pi+pi- at sqrt(s)=10.865 GeV

Jun 30, 2018 06/18

by A. Garmash; A. Bondar; A. Kuzmin; A. Abdesselam; I. Adachi; H. Aihara; S. Al Said; D. M. Asner; V. Aulchenko; T. Aushev; R. Ayad; M. Nakao; Z. Natkaniec; M. Nayak; E. Nedelkovska; N. K. Nisar; S. Nishida; O. Nitoh; S. Okuno; W. Ostrowicz; P. Pakhlov; A. M. Bakich; H. Park; H. K. Park; T. K. Pedlar; R. Pestotnik; M. Petric; L. E. Piilonen; E. Ribezl; M. Ritter; M. Rohrken; A. Rostomyan; A. Bala; S. Ryu; T. Saito; Y. Sakai; S. Sandilya; D. Santel; T. Sanuki; Y. Sato; O. Schneider; G. Schnell; A....

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We report results on studies of the e+e- annihilation into three-body Y(nS)pi+pi- (n=1,2,3) final states including measurements of cross sections and the full amplitude analysis. The cross sections measured at sqrt(s)=10.865 GeV and corrected for the initial state radiation are sigma(e+e-=>Y(1S)pi+pi-)=(2.27+-0.12+-0.14) pb, sigma(e+e-=>Y(2S)pi+pi-)=(4.07+-0.16+-0.45) pb, and sigma(e+e-=>Y(3S)pi+pi-)=(1.46+-0.09+-0.16) pb. Amplitude analysis of the three-body Y(nS)pi+pi- final states...
Topic: High Energy Physics - Experiment
Source: http://arxiv.org/abs/1403.0992

Arxiv.org

40 40

$Precise measurement of the CP violation parameter sin2phi_1 in B0-->(c\bar c)K0 decays$

Precise measurement of the CP violation parameter sin2phi_1 in B0-->(c\bar c)K0 decays

Sep 18, 2013 09/13

by Belle Collaboration; I. Adachi; H. Aihara; D. M. Asner; V. Aulchenko; T. Aushev; T. Aziz; A. M. Bakich; A. Bay; V. Bhardwaj; B. Bhuyan; M. Bischofberger; A. Bondar; A. Bozek; M. Bracko; T. E. Browder; P. Chen; B. G. Cheon; K. Chilikin; R. Chistov; K. Cho; S. -K. Choi; Y. Choi; J. Dalseno; M. Danilov; Z. Dolezal; Z. Drasal; S. Eidelman; D. Epifanov; J. E. Fast; V. Gaur; N. Gabyshev; A. Garmash; Y. M. Goh; B. Golob; J. Haba; K. Hara; T. Hara; K. Hayasaka; H. Hayashii; T. Higuchi; Y. Horii; Y....

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We present a precise measurement of the CP violation parameter sin2phi_1 and the direct CP violation parameter A_f using the final data sample of 772x10^6 B\bar B pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. One neutral B meson is reconstructed in a J/psi K0S, psi(2S) K0S, chi_c1 K0S or J/psi K0L CP-eigenstate and its flavor is identified from the decay products of the accompanying B meson. From the distribution of proper time...
Source: http://arxiv.org/abs/1201.4643v2

Arxiv.org

73 73

$Measurement of the inclusive semileptonic branching fraction Bf(B_s^0 -> X^- l^+ nu) at Belle$

Measurement of the inclusive semileptonic branching fraction Bf(B_s^0 -> X^- l^+ nu) at Belle

Sep 23, 2013 09/13

by Belle Collaboration; C. Oswald; P. Urquijo; J. Dingfelder; I. Adachi; H. Aihara; K. Arinstein; D. M. Asner; T. Aushev; A. M. Bakich; K. Belous; V. Bhardwaj; B. Bhuyan; A. Bondar; G. Bonvicini; A. Bozek; M. Bračko; T. E. Browder; P. Chang; V. Chekelian; A. Chen; P. Chen; B. G. Cheon; K. Chilikin; R. Chistov; K. Cho; V. Chobanova; S. -K. Choi; Y. Choi; D. Cinabro; J. Dalseno; Z. Doležal; Z. Drásal; A. Drutskoy; D. Dutta; S. Eidelman; S. Esen; H. Farhat; J. E. Fast; V. Gaur; N. Gabyshev; S....

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We report a measurement of the inclusive semileptonic B_s^0 branching fraction in a 121 fb^{-1} data sample collected near the Upsilon(5S) resonance with the Belle detector at the KEKB asymmetric energy e^+ e^- collider. Events containing B_s^0 pairs are selected by reconstructing a tag side D_s^+ and identifying a signal side lepton l^+ (l = e, mu) that is required to have the same-sign charge to ensure that both originate from different B_s^0 mesons. The B_s^0 -> X^- l^+ nu branching...
Source: http://arxiv.org/abs/1212.6400v3

Arxiv.org

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Evidence for the eta_b(2S) and observation of h_b(1P) -> eta_b(1S) gamma and h_b(2P) -> eta_b(1S) gamma

Sep 20, 2013 09/13

by Belle Collaboration; R. Mizuk; D. M. Asner; A. Bondar; T. K. Pedlar; I. Adachi; H. Aihara; K. Arinstein; V. Aulchenko; T. Aushev; T. Aziz; A. M. Bakich; A. Bay; K. Belous; V. Bhardwaj; B. Bhuyan; M. Bischofberger; G. Bonvicini; A. Bozek; M. Bračko; T. E. Browder; V. Chekelian; A. Chen; P. Chen; B. G. Cheon; K. Chilikin; R. Chistov; I. -S. Cho; K. Cho; S. -K. Choi; Y. Choi; J. Dalseno; M. Danilov; Z. Doležal; Z. Drásal; A. Drutskoy; S. Eidelman; D. Epifanov; J. E. Fast; V. Gaur; N. Gabyshev;...

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We report the first evidence for the eta_b(2S) using the h_b(2P)->eta_b(2S)gamma transition and the first observation of the h_b(1P)->eta_b(1S)gamma and h_b(2P)->eta_b(1S)gamma transitions. The mass and width of the eta_b(1S) and eta_b(2S) are measured to be m_etab(1S)=(9402.4+-1.5+-1.8)MeV/c^2, m_etab(2S)=(9999.0+-3.5 +2.8-1.9)MeV/c^2 and Gamma_etab(1S)=(10.8 +4.0-3.7 +4.5-2.0)MeV. We also update the h_b(1P) and h_b(2P) mass measurements. We use a 133.4/fb data sample collected at...
Source: http://arxiv.org/abs/1205.6351v2

Arxiv.org

50 50

Search for heavy neutrinos at Belle

Sep 21, 2013 09/13

by Belle Collaboration; D. Liventsev; I. Adachi; H. Aihara; K. Arinstein; D. M. Asner; V. Aulchenko; T. Aushev; A. M. Bakich; A. Bay; K. Belous; B. Bhuyan; A. Bondar; G. Bonvicini; A. Bozek; M. Bracko; T. E. Browder; P. Chang; V. Chekelian; A. Chen; B. G. Cheon; R. Chistov; K. Cho; V. Chobanova; S. -K. Choi; Y. Choi; D. Cinabro; J. Dalseno; Z. Dolezal; Z. Drasal; A. Drutskoy; D. Dutta; S. Eidelman; D. Epifanov; S. Esen; H. Farhat; J. E. Fast; V. Gaur; N. Gabyshev; S. Ganguly; R. Gillard; Y. M....

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We report on a search for heavy neutrinos in B-meson decays. The results are obtained using a data sample that contains 772x10^6 BB-bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. No signal is observed and upper limits are set on mixing of heavy neutrinos with left-handed neutrinos of the Standard Model in the mass range 0.5 - 5.0 GeV/c^2.
Source: http://arxiv.org/abs/1301.1105v2

Arxiv.org

56 56

Evidence for B- -> Ds+ K- l- nubar and search for B- -> Ds*+ K- l- nubar

Sep 20, 2013 09/13

by Belle Collaboration; J. Stypula; M. Rozanska; I. Adachi; K. Adamczyk; H. Aihara; D. M. Asner; T. Aushev; A. M. Bakich; V. Bhardwaj; B. Bhuyan; M. Bischofberger; A. Bondar; G. Bonvicini; A. Bozek; M. Bra\v; T. E. Browder; M. -C. Chang; P. Chang; V. Chekelian; A. Chen; P. Chen; B. G. Cheon; R. Chistov; I. -S. Cho; K. Cho; Y. Choi; J. Dalseno; M. Danilov; J. Dingfelder; Z. Dole\v; Z. Drásal; A. Drutskoy; S. Eidelman; H. Farhat; J. E. Fast; V. Gaur; N. Gabyshev; R. Gillard; Y. M. Goh; B. Golob; J....

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We report measurements of the decays B- -> Ds(*)+ K- l- nubar in a data sample containing 657x10^6 BBbar pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. We observe a signal with a significance of 6 sigma for the combined Ds and Ds* modes and find the first evidence of the B- -> Ds+ K- l- nubar decay with a significance of 3.4 sigma. We measure the following branching fractions: BF(B- -> Ds+ K- l nubar) = (0.30 +/- 0.09(stat) +0.11 -0.08(syst)) x...
Source: http://arxiv.org/abs/1207.6244v3

Arxiv.org

14 14

$Measurement of ${D^{0}}$-${\overline{D}{}^{0}}$ Mixing and Search for Indirect $CP$ Violation Using ${D^0\to K_S^0\pi^+\pi^-}$ Decays$

Measurement of ${D^{0}}$-${\overline{D}{}^{0}}$ Mixing and Search for Indirect $CP$ Violation Using ${D^0\to K_S^0\pi^+\pi^-}$ Decays

Jun 30, 2018 06/18

by Belle Collaboration; A. Abdesselam; I. Adachi; H. Aihara; K. Arinstein; D. M. Asner; V. Aulchenko; T. Aushev; R. Ayad; A. M. Bakich; A. Bala; N. K. Nisar; S. Nishida; O. Nitoh; S. Ogawa; P. Pakhlov; H. Park; H. K. Park; T. K. Pedlar; R. Pestotnik; M. Petrič; V. Bhardwaj; L. E. Piilonen; E. Ribežl; M. Ritter; M. Röhrken; A. Rostomyan; H. Sahoo; T. Saito; Y. Sakai; S. Sandilya; D. Santel; B. Bhuyan; L. Santelj; T. Sanuki; Y. Sato; V. Savinov; O. Schneider; G. Schnell; C. Schwanda; R. Seidl; D....

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We report a measurement of ${D^{0}}$-${\overline{D}{}^{0}}$ mixing parameters and a search for indirect $CP$ violation through a time-dependent amplitude analysis of ${D^0\to K_S^0\pi^+\pi^-}$ decays. The results are based on 921~fb$^{-1}$ of data accumulated with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. Assuming $CP$ conservation, we measure the mixing parameters $x=(0.56\pm0.19^{+0.03}_{-0.09}{^{+0.06}_{-0.09}})\%$ and...
Topic: High Energy Physics - Experiment
Source: http://arxiv.org/abs/1404.2412

Arxiv.org

121 121

Search for Time-Dependent CPT Violation in Hadronic and Semileptonic B Decays

Sep 17, 2013 09/13

by T. Higuchi; K. Sumisawa; I. Adachi; H. Aihara; D. M. Asner; V. Aulchenko; T. Aushev; A. M. Bakich; A. Bay; K. Belous; V. Bhardwaj; B. Bhuyan; M. Bischofberger; A. Bondar; A. Bozek; M. Bračko; O. Brovchenko; T. E. Browder; M. -C. Chang; P. Chang; A. Chen; P. Chen; B. G. Cheon; K. Chilikin; R. Chistov; I. -S. Cho; K. Cho; S. -K. Choi; Y. Choi; J. Dalseno; M. Danilov; Z. Doležal; Z. Drásal; S. Eidelman; D. Epifanov; J. E. Fast; V. Gaur; N. Gabyshev; A. Garmash; Y. M. Goh; B. Golob; J. Haba; K....

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We report a new sensitive search for CPT violation, which includes improved measurements of the CPT-violating parameter z and the total decay-width difference normalized to the averaged width DeltaGamma_d/Gamma_d of the two Bd mass eigenstates. The results are based on a data sample of 535 x 10^6 BBbar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^+e^- collider. We obtain Re(z) = [+1.9 +/- 3.7 (stat) +/- 3.3 (syst)] x 10^{-2}, Im(z) = [-5.7...
Source: http://arxiv.org/abs/1203.0930v2

Arxiv.org

56 56

$Study of $e^+ e^- \to π^+ π^- J/ψ$ and Observation of a Charged Charmonium-like State at Belle$

Study of $e^+ e^- \to π^+ π^- J/ψ$ and Observation of a Charged Charmonium-like State at Belle

Sep 17, 2013 09/13

by Belle Collaboration; Z. Q. Liu; C. P. Shen; C. Z. Yuan; I. Adachi; H. Aihara; D. M. Asner; V. Aulchenko; T. Aushev; T. Aziz; A. M. Bakich; A. Bala; K. Belous; B. Bhuyan; M. Bischofberger; A. Bondar; G. Bonvicini; A. Bozek; M. Bračko; J. Brodzicka; T. E. Browder; P. Chang; V. Chekelian; A. Chen; P. Chen; B. G. Cheon; R. Chistov; K. Cho; V. Chobanova; S. -K. Choi; Y. Choi; D. Cinabro; J. Dalseno; M. Danilov; Z. Doležal; Z. Drásal; A. Drutskoy; D. Dutta; K. Dutta; S. Eidelman; D. Epifanov; H....

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The cross section for $e^+ e^- \to \pi^+ \pi^- J/\psi$ between 3.8 GeV and 5.5 GeV is measured with a 967 fb$^{-1}$ data sample collected by the Belle detector at or near the $\Upsilon(nS)$ ($n = 1,\ 2,\ ...,\ 5$) resonances. The Y(4260) state is observed, and its resonance parameters are determined. In addition, an excess of $\pi^+ \pi^- J/\psi$ production around 4 GeV is observed. This feature can be described by a Breit-Wigner parameterization with properties that are consistent with the...
Source: http://arxiv.org/abs/1304.0121v2

Arxiv.org

149 149

$Evidence of a new narrow resonance decaying to $χ_{c1}γ$ in $B \to χ_{c1} γK$$

Evidence of a new narrow resonance decaying to $χ_{c1}γ$ in $B \to χ_{c1} γK$

Sep 17, 2013 09/13

by Belle Collaboration; V. Bhardwaj; K. Miyabayashi; I. Adachi; H. Aihara; D. M. Asner; V. Aulchenko; T. Aushev; T. Aziz; A. M. Bakich; A. Bala; B. Bhuyan; M. Bischofberger; A. Bondar; G. Bonvicini; A. Bozek; M. Bračko; J. Brodzicka; T. E. Browder; V. Chekelian; A. Chen; B. G. Cheon; K. Chilikin; R. Chistov; K. Cho; V. Chobanova; S. -K. Choi; Y. Choi; D. Cinabro; J. Dalseno; M. Danilov; Z. Doležal; Z. Drásal; A. Drutskoy; D. Dutta; K. Dutta; S. Eidelman; D. Epifanov; H. Farhat; J. E. Fast; T....

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We report measurements of $B \to \chi_{c1} \gamma K$ and $\chi_{c2} \gamma K$ decays using $772 \times 10^{6}$ $B\bar{B}$ events collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. Evidence of a new resonance in the $\chi_{c1} \gamma$ final state is found with a statistical significance of $3.8 \sigma$. This state has a mass of $3823.1 \pm 1.8 {(stat)} \pm 0.7 {(syst)}$ MeV/$c^2$, a value that is consistent with theoretical...
Source: http://arxiv.org/abs/1304.3975v2

Arxiv.org

56 56

Study of Three-Body Y(10860) Decays

Sep 18, 2013 09/13

by I. Adachi; K. Adamczyk; H. Aihara; K. Arinstein; Y. Arita; D. M. Asner; T. Aso; V. Aulchenko; T. Aushev; T. Aziz; A. M. Bakich; Y. Ban; E. Barberio; M. Barrett; A. Bay; I. Bedny; M. Belhorn; K. Belous; V. Bhardwaj; B. Bhuyan; M. Bischofberger; S. Blyth; A. Bondar; G. Bonvicini; A. Bozek; M. Bra\v; J. Brodzicka; O. Brovchenko; T. E. Browder; M. -C. Chang; P. Chang; Y. Chao; V. Chekelian; A. Chen; K. -F. Chen; P. Chen; B. G. Cheon; K. Chilikin; R. Chistov; I. -S. Cho; K. Cho; K. -S. Choi; S. -K....

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We report preliminary results on the analysis of the three-body Y(10860)=> B barB pi, Y(10860) => (B barB* + c.c.) pi and Y(10860)=> B* barB* pi decays including an observation of the Y(10860)=> Zb(10610)+- pi-+ => [B barB*+c.c]+- pi-+ and Y(10860)=> Zb(10650)+- pi-+ => [B* barB*]+- pi-+ decays as intermediate channels. We measure branching fractions of the three-body decays to be Br(Y(10860)=> [B barB*+c.c.]+- pi-+)=(28.3+-2.9+-4.6)x10^{-3} and Br(Y(10860)=> [B*...
Source: http://arxiv.org/abs/1209.6450v2

Arxiv.org

55 55

Evidence for a Zb0(10610) in Dalitz analysis of Y(5S) -> Y(nS) pi0 pi0

Sep 20, 2013 09/13

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We report the first observation of Y(5S) -> Y(1,2S) pi0 pi0 decays. Evidence for the Zb0(10610) with 4.9sigma significance is found in a Dalitz plot analysis of Y(5S) -> Y(2S) pi0 pi0 decays. The results are obtained with a 121.4 fb^-1 data sample collected with the Belle detector at the Y(5S) resonance at the KEKB asymmetric-energy e+e- collider.
Source: http://arxiv.org/abs/1207.4345v1

Arxiv.org

25 25

$Measurement of the amplitude ratio of $B^0 \to D^0K^{*0}$ and $B^0 \to \bar{D^0}K^{*0}$ decays with a model-independent Dalitz plot analysis using $D\to K_S^0\pi^+\pi^-$ decays$

Measurement of the amplitude ratio of $B^0 \to D^0K^{*0}$ and $B^0 \to \bar{D^0}K^{*0}$ decays with a model-independent Dalitz plot analysis using $D\to K_S^0\pi^+\pi^-$ decays

Jun 26, 2018 06/18

by A. Abdesselam; I. Adachi; K. Adamczyk; H. Aihara; S. Al Said; K. Arinstein; Y. Arita; D. M. Asner; T. Aso; V. Aulchenko; T. Aushev; H. Hayashii; X. H. He; M. Heck; M. Hedges; D. Heffernan; M. Heider; A. Heller; T. Higuchi; S. Himori; T. Horiguchi; R. Ayad; Y. Horii; Y. Hoshi; K. Hoshina; W. -S. Hou; Y. B. Hsiung; M. Huschle; H. J. Hyun; Y. Igarashi; T. Iijima; M. Imamura; T. Aziz; K. Inami; A. Ishikawa; K. Itagaki; R. Itoh; M. Iwabuchi; M. Iwasaki; Y. Iwasaki; T. Iwashita; S. Iwata; I. Jaegle;...

eye 25

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We report a measurement of the amplitude ratio $r_S$ of $B^0 \to D^0K^{*0}$ and $B^0 \to \bar{D^0}K^{*0}$ decays with a model-independent Dalitz plot analysis using $D\to K_S^0\pi^+\pi^-$ decays. Using the full data sample of $772\times10^6$ $B\bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the Belle detector at KEKB accelerator the upper limit is $r_S < 0.87$ at the 68 % confidence level. This result is the first measurement of $r_S$ with a model-independent Dalitz analysis,...
Topic: High Energy Physics - Experiment
Source: http://arxiv.org/abs/1502.07550

Arxiv.org

9 9.0

$Measurement of the branching fraction of $B^+ \to \tau^+ \nu_\tau$ decays with the semileptonic tagging method and the full Belle data sample$

Measurement of the branching fraction of $B^+ \to \tau^+ \nu_\tau$ decays with the semileptonic tagging method and the full Belle data sample

Jun 30, 2018 06/18

by Belle Collaboration; A. Abdesselam; I. Adachi; K. Adamczyk; H. Aihara; S. Al Said; K. Arinstein; Y. Arita; D. M. Asner; T. Aso; V. Aulchenko; M. Heider; T. Higuchi; S. Himori; T. Horiguchi; Y. Horii; Y. Hoshi; K. Hoshina; W. -S. Hou; Y. B. Hsiung; M. Huschle; T. Aushev; H. J. Hyun; Y. Igarashi; T. Iijima; M. Imamura; K. Inami; A. Ishikawa; K. Itagaki; R. Itoh; M. Iwabuchi; M. Iwasaki; R. Ayad; Y. Iwasaki; T. Iwashita; S. Iwata; I. Jaegle; M. Jones; K. K. Joo; T. Julius; D. H. Kah; H. Kakuno; J....

eye 9

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We report a measurement of the branching fraction of $B^+ \to \tau^+ \nu_\tau$ decays using a data sample of $772 \times 10^6 B \bar{B}$ pairs, collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. We reconstruct the accompanying $B$ meson in a semileptonic decay and detect the $B^+ \to \tau^+ \nu_\tau$ candidate in the recoiling event. We obtain a branching fraction of ${\cal B}(B^+ \to \tau^+ \nu_\tau) = [1.25 \pm 0.28 ({\rm stat.})...
Topic: High Energy Physics - Experiment
Source: http://arxiv.org/abs/1409.5269

Arxiv.org

23 23

Measurement of Azimuthal Modulations in the Cross-Section of Di-Pion Pairs in Di-Jet Production from Electron-Positron Annihilation

Jun 27, 2018 06/18

by A. Abdesselam; I. Adachi; K. Adamczyk; H. Aihara; S. Al Said; K. Arinstein; Y. Arita; D. M. Asner; T. Aso; V. Aulchenko; T. Aushev; Y. Hasegawa; J. Hasenbusch; K. Hayasaka; H. Hayashii; X. H. He; M. Heck; M. Hedges; D. Heffernan; M. Heider; A. Heller; R. Ayad; T. Higuchi; S. Himori; T. Horiguchi; Y. Hoshi; K. Hoshina; W. -S. Hou; Y. B. Hsiung; C. -L. Hsu; M. Huschle; H. J. Hyun; T. Aziz; Y. Igarashi; T. Iijima; M. Imamura; K. Inami; G. Inguglia; A. Ishikawa; K. Itagaki; R. Itoh; M. Iwabuchi; M....

eye 23

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We present an extraction of azimuthal correlations between two pairs of charged pions detected in opposite jets from electron-positron annihilation. These correlations may arise from the dependence of the di-pion fragmentation on the polarization of the parent quark in the process $e^+e^- \rightarrow q \bar{q}$. Due to the correlation of the quark polarizations, the cross-section of di-pion pair production, in which the pion pairs are detected in opposite jets in a dijet event, exhibits a...
Topic: High Energy Physics - Experiment
Source: http://arxiv.org/abs/1505.08020

Arxiv.org

9 9.0

$Study of \chi_{bJ}(1P) Properties in the Radiative \Upsilon(2S) Decays$

Study of \chi_{bJ}(1P) Properties in the Radiative \Upsilon(2S) Decays

Jun 29, 2018 06/18

by A. Abdesselam; I. Adachi; K. Adamczyk; H. Aihara; S. Al Said; K. Arinstein; Y. Arita; D. M. Asner; T. Aso; H. Atmacan; V. Aulchenko; O. Grzymkowska; H. Guo; J. Haba; P. Hamer; Y. L. Han; K. Hara; T. Hara; Y. Hasegawa; J. Hasenbusch; K. Hayasaka; T. Aushev; H. Hayashii; X. H. He; M. Heck; M. T. Hedges; D. Heffernan; M. Heider; A. Heller; T. Higuchi; S. Himori; S. Hirose; R. Ayad; T. Horiguchi; Y. Hoshi; K. Hoshina; W. -S. Hou; Y. B. Hsiung; C. -L. Hsu; M. Huschle; H. J. Hyun; Y. Igarashi; T....

eye 9

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We report a study of radiative decays of \chi_{bJ}(1P)(J=0,1,2) mesons into 74 hadronic final states comprising charged and neutral pions, kaons, protons; out of these, 41 modes are observed with at least 5 standard deviation significance. Our measurements not only improve the previous measurements by the CLEO Collaboration but also lead to first observations in many new modes. The large sample allows us to probe the total decay width of the \chi_{b0}(1P). In the absence of a statistically...
Topic: High Energy Physics - Experiment
Source: http://arxiv.org/abs/1606.01276

Arxiv.org

16 16

$Measurement of the branching ratio of $\bar{B}^0 \rightarrow D^{*+} \tau^- \bar{\nu}_{\tau}$ relative to $\bar{B}^0 \rightarrow D^{*+} \ell^- \bar{\nu}_{\ell}$ decays with a semileptonic tagging method$

Measurement of the branching ratio of $\bar{B}^0 \rightarrow D^{*+} \tau^- \bar{\nu}_{\tau}$ relative to $\bar{B}^0 \rightarrow D^{*+} \ell^- \bar{\nu}_{\ell}$ decays with a semileptonic tagging method

Jun 29, 2018 06/18

by A. Abdesselam; I. Adachi; K. Adamczyk; H. Aihara; S. Al Said; K. Arinstein; Y. Arita; D. M. Asner; T. Aso; H. Atmacan; V. Aulchenko; H. Guo; J. Haba; P. Hamer; Y. L. Han; K. Hara; T. Hara; Y. Hasegawa; J. Hasenbusch; K. Hayasaka; H. Hayashii; T. Aushev; X. H. He; M. Heck; M. T. Hedges; D. Heffernan; M. Heider; A. Heller; T. Higuchi; S. Himori; S. Hirose; T. Horiguchi; R. Ayad; Y. Hoshi; K. Hoshina; W. -S. Hou; Y. B. Hsiung; C. -L. Hsu; M. Huschle; H. J. Hyun; Y. Igarashi; T. Iijima; M. Imamura;...

eye 16

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We report a measurement of ratio ${\cal R}(D^*) = {\cal B}(\bar{B}^0 \rightarrow D^{*+} \tau^- \bar{\nu}_{\tau})/{\cal B}(\bar{B}^0 \rightarrow D^{*+} \ell^- \bar{\nu}_{\ell})$, where $\ell$ denotes an electron or a muon. The results are based on a data sample containing $772\times10^6$ $B\bar{B}$ pairs recorded at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB $e^+ e^-$ collider. We select a sample of $B^0 \bar{B}^0$ pairs by reconstructing both $B$ mesons in semileptonic...
Topic: High Energy Physics - Experiment
Source: http://arxiv.org/abs/1603.06711

Arxiv.org

13 13

$Angular analysis of $B^0 \to K^\ast(892)^0 \ell^+ \ell^-$$

Angular analysis of $B^0 \to K^\ast(892)^0 \ell^+ \ell^-$

Jun 29, 2018 06/18

by Belle Collaboration; A. Abdesselam; I. Adachi; K. Adamczyk; H. Aihara; S. Al Said; K. Arinstein; Y. Arita; D. M. Asner; T. Aso; H. Atmacan; O. Grzymkowska; H. Guo; J. Haba; P. Hamer; Y. L. Han; K. Hara; T. Hara; Y. Hasegawa; J. Hasenbusch; K. Hayasaka; V. Aulchenko; H. Hayashii; X. H. He; M. Heck; M. T. Hedges; D. Heffernan; M. Heider; A. Heller; T. Higuchi; S. Himori; S. Hirose; T. Aushev; T. Horiguchi; Y. Hoshi; K. Hoshina; W. -S. Hou; Y. B. Hsiung; C. -L. Hsu; M. Huschle; H. J. Hyun; Y....

eye 13

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We present a measurement of angular observables, $P_4'$, $P_5'$, $P_6'$, $P_8'$, in the decay $B^0 \to K^\ast(892)^0 \ell^+ \ell^-$, where $\ell^+\ell^-$ is either $e^+e^-$ or $\mu^+\mu^-$. The analysis is performed on a data sample corresponding to an integrated luminosity of $711~\mathrm{fb}^{-1}$ containing $772\times 10^{6}$ $B\bar B$ pairs, collected at the $\Upsilon(4S)$ resonance with the Belle detector at the asymmetric-energy $e^+e^-$ collider KEKB. Four angular observables,...
Topic: High Energy Physics - Experiment
Source: http://arxiv.org/abs/1604.04042

Arxiv.org

13 13

$Measurement of $CP$ asymmetry in the $D^{0} \to K^0_S K^0_S$ decay at Belle$

Measurement of $CP$ asymmetry in the $D^{0} \to K^0_S K^0_S$ decay at Belle

Jun 29, 2018 06/18

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We report a measurement of the time-integrated $CP$ asymmetry in the neutral charm meson decay $D^0 \to K^0_S K^0_S$ using 921~fb$^{-1}$ data collected at the $\Upsilon(4S)$ and $\Upsilon(5S)$ resonances with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. The observed asymmetry is $$ A_{CP}(D^0 \to K^0_S K^0_S) = (-0.02 \pm 1.53 \pm 0.17) \%, $$ where the first uncertainty is statistical and the second systematic. This latter uncertainty is dominated by the error of the...
Topic: High Energy Physics - Experiment
Source: http://arxiv.org/abs/1609.06393

Arxiv.org

21 21

$Measurement of the $\tau$ lepton polarization in the decay ${\bar B} \rightarrow D^* \tau^- {\bar \nu_{\tau}}$$

Measurement of the $\tau$ lepton polarization in the decay ${\bar B} \rightarrow D^* \tau^- {\bar \nu_{\tau}}$

Jun 29, 2018 06/18

eye 21

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We report the first measurement of the $\tau$ lepton polarization in the decay ${\bar B} \rightarrow D^* \tau^- {\bar\nu_{\tau}}$ as well as a new measurement of the ratio of the branching fractions $R(D^{*}) = \mathcal{B}({\bar B} \rightarrow D^* \tau^- {\bar\nu_{\tau}}) / \mathcal{B}({\bar B} \rightarrow D^* \ell^- {\bar\nu_{\ell}})$, where $\ell^-$ denotes an electron or a muon, with the decays $\tau^- \rightarrow \pi^- \nu_{\tau}$ and $\tau^- \rightarrow \rho^- \nu_{\tau}$. We use the full...
Topic: High Energy Physics - Experiment
Source: http://arxiv.org/abs/1608.06391

Arxiv.org

12 12

$Study of Two-Body $e^+e^- \to B_s^{(*)}\bar{B}_s^{(*)}$ Production in the Energy Range from 10.77 to 11.02 GeV$

Study of Two-Body $e^+e^- \to B_s^{(*)}\bar{B}_s^{(*)}$ Production in the Energy Range from 10.77 to 11.02 GeV

Jun 29, 2018 06/18

eye 12

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We report results on the studies of the $e^+e^-\to B_s^{(*)}\bar{B}_s^{(*)}$ processes. The results are based on a $121.4$ fb$^{-1}$ data sample collected with the Belle detector at the center-of-mass energy near the $\Upsilon(10860)$ peak and $16.4$ fb$^{-1}$ of data collected at 19 energy points in the range from 10.77 to 11.02 GeV. We observe a clear $e^+e^-\to\Upsilon(10860)\to B_s^{(*)}\bar{B}_s^{(*)}$ signal, with no statistically significant signal of $e^+e^-\to \Upsilon(11020)\to...
Topic: High Energy Physics - Experiment
Source: http://arxiv.org/abs/1609.08749

Arxiv.org

8 8.0

$Precise determination of the CKM matrix element $\left| V_{cb}\right|$ with $\bar B^0 \to D^{*\,+} \, \ell^- \, \bar \nu_\ell$ decays with hadronic tagging at Belle$

Precise determination of the CKM matrix element $\left| V_{cb}\right|$ with $\bar B^0 \to D^{*\,+} \, \ell^- \, \bar \nu_\ell$ decays with hadronic tagging at Belle

Jun 30, 2018 06/18

by The Belle Collaboration; A. Abdesselam; I. Adachi; K. Adamczyk; H. Aihara; S. Al Said; K. Arinstein; Y. Arita; D. M. Asner; T. Aso; H. Atmacan; B. Golob; D. Greenwald; M. Grosse Perdekamp; J. Grygier; O. Grzymkowska; Y. Guan; E. Guido; H. Guo; J. Haba; P. Hamer; V. Aulchenko; Y. L. Han; K. Hara; T. Hara; Y. Hasegawa; J. Hasenbusch; K. Hayasaka; H. Hayashii; X. H. He; M. Heck; M. T. Hedges; T. Aushev; D. Heffernan; M. Heider; A. Heller; T. Higuchi; S. Himori; S. Hirose; T. Horiguchi; Y. Hoshi;...

eye 8

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The precise determination of the CKM matrix element $\left| V_{cb}\right|$ is important for carrying out tests of the flavour sector of the Standard Model. In this article we present a preliminary analysis of the $\bar B^0 \to D^{*\,+} \, \ell^- \, \bar \nu_\ell$ decay mode and its charge conjugate, selected in events that contain a fully reconstructed $B$-meson, using 772 million $e^+ \, e^- \to \Upsilon(4S) \to B \bar B$ events recorded by the Belle detector at KEKB. Unfolded differential...
Topic: High Energy Physics - Experiment
Source: http://arxiv.org/abs/1702.01521

Arxiv.org

10 10.0

$Evidence for the decay $B^{0}\to \eta \eta$$

Evidence for the decay $B^{0}\to \eta \eta$

Jun 29, 2018 06/18

eye 10

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We report a search for $B^{0}\to \eta \eta $ with a data sample corresponding to an integrated luminosity of $698 \,{\rm fb}^{-1}$ containing $753 \times 10^{6}$ $B\bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$ collider. The branching fraction is measured to be $\mathcal{B}(B^{0} \to \eta \eta ) = (7.6^{+2.7 +1.4}_{-2.3 -1.6}) \times 10^{-7}$ at the level of 3.3 standard deviations above zero, which provides the first...
Topic: High Energy Physics - Experiment
Source: http://arxiv.org/abs/1609.03267

Arxiv.org

8 8.0

$Observation of Transverse $\Lambda/\bar{\Lambda}$ Hyperon Polarization in $e^+e^-$ Annihilation at Belle$

Observation of Transverse $\Lambda/\bar{\Lambda}$ Hyperon Polarization in $e^+e^-$ Annihilation at Belle

Jun 29, 2018 06/18

by The Belle Collaboration; A. Abdesselam; I. Adachi; K. Adamczyk; H. Aihara; S. Al Said; K. Arinstein; Y. Arita; D. M. Asner; T. Aso; H. Atmacan; Y. Guan; H. Guo; J. Haba; P. Hamer; Y. L. Han; K. Hara; T. Hara; Y. Hasegawa; J. Hasenbusch; K. Hayasaka; V. Aulchenko; H. Hayashii; X. H. He; M. Heck; M. T. Hedges; D. Heffernan; M. Heider; A. Heller; T. Higuchi; S. Himori; S. Hirose; T. Aushev; T. Horiguchi; Y. Hoshi; K. Hoshina; W. -S. Hou; Y. B. Hsiung; C. -L. Hsu; M. Huschle; H. J. Hyun; Y....

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We report the first observation of the polarization of $\Lambda/\bar{\Lambda}$ hyperons transverse to its production plane in $e^+e^-$ annihilation. We observe a significant polarization that rises with the fractional energy carried by the hyperon as well as its transverse momentum. To define the production plane, we use the direction of the hyperon momentum together with either the thrust axis in the event or the momentum vector of a hadron in the opposite hemisphere. Furthermore, we...
Topic: High Energy Physics - Experiment
Source: http://arxiv.org/abs/1611.06648

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