Measurement of the τ lepton polarization and R(D) in the decay (B)over-bar → Dτ-(ν)over-barτ with one-prong hadronic τ decays at Belle

被引：146

作者：

Hirose, S. ^{[52
]}

Iijima, T. ^{[52
,53
]}

Adachi, I. ^{[10
,14
]}

Adamczyk, K. ^{[58
]}

Aihara, H. ^{[81
]}

Al Said, S. ^{[36
,75
]}

Asner, D. M. ^{[63
]}

Atmacan, H. ^{[71
]}

Aushev, T. ^{[51
]}

Ayad, R. ^{[75
]}

Aziz, T. ^{[76
]}

Babu, V. ^{[76
]}

Badhrees, I. ^{[35
,75
]}

Bakich, A. M. ^{[74
]}

Bansal, V. ^{[63
]}

Berger, M. ^{[72
]}

Bhardwaj, V. ^{[17
]}

Bhuyan, B. ^{[19
]}

Biswal, J. ^{[30
]}

Bondar, A. ^{[2
,61
]}

Bozek, A. ^{[58
]}

Bracko, M. ^{[30
,46
]}

Browder, T. E. ^{[13
]}

Cervenkov, D. ^{[3
]}

Chang, M. -C. ^{[7
]}

Chang, P. ^{[57
]}

Chekelian, V. ^{[47
]}

Chen, A. ^{[55
]}

Cheon, B. G. ^{[12
]}

Chilikin, K. ^{[42
,50
]}

Cho, K. ^{[37
]}

Choi, S. -K. ^{[11
]}

Choi, Y. ^{[73
]}

Choudhury, S. ^{[20
]}

Cinabro, D. ^{[87
]}

Czank, T. ^{[80
]}

Dash, N. ^{[18
]}

Di Carlo, S. ^{[87
]}

Dolezal, Z. ^{[3
]}

Dutta, D. ^{[76
]}

Eidelman, S. ^{[2
,61
]}

Fast, J. E. ^{[63
]}

Ferber, T. ^{[5
]}

Fulsom, B. G. ^{[63
]}

Garg, R. ^{[64
]}

Gaur, V. ^{[86
]}

Gabyshev, N. ^{[2
,61
]}

Garmash, A. ^{[31
]}

Gelb, M. ^{[20
]}

Giri, A. ^{[32
]}

机构：

[1] Univ Basque Country UPV EHU, Bilbao 48080, Spain

[2] SB RAS, Budker Inst Nucl Phys, Novosibirsk 630090, Russia

[3] Charles Univ Prague, Fac Math & Phys, Prague 12116, Czech Republic

[4] Univ Cincinnati, Cincinnati, OH 45221 USA

[5] Deutsch Elektr Synchrotron, D-22607 Hamburg, Germany

[6] Univ Florida, Gainesville, FL 32611 USA

[7] Fu Jen Catholic Univ, Dept Phys, Taipei 24205, Taiwan

[8] Justus Liebig Univ Giessen, D-35392 Giessen, Germany

[9] Gifu Univ, Gifu 5011193, Japan

[10] Grad Univ Adv Studies, SOKENDAI, Hayama 2400193, Japan

[11] Gyeongsang Natl Univ, Chinju 660701, South Korea

[12] Hanyang Univ, Seoul 133791, South Korea

[13] Univ Hawaii, Honolulu, HI 96822 USA

[14] High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan

[15] High Energy Accelerator Res Org KEK, KEK Theory Ctr, J PARC Branch, Tsukuba, Ibaraki 3050801, Japan

[16] Basque Fdn Sci, IKERBASQUE, Bilbao 48013, Spain

[17] Indian Inst Sci Educ & Res Mohali, Sas Nagar 140306, India

[18] Indian Inst Technol Bhubaneswar, Satya Nagar 751007, India

[19] Indian Inst Technol, Gauhati 781039, Assam, India

[20] Indian Inst Technol, Hyderabad 502285, Andhra Pradesh, India

[21] Indian Inst Technol Madras, Madras 600036, Tamil Nadu, India

[22] Indiana Univ, Bloomington, IN 47408 USA

[23] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

[24] Inst High Energy Phys, A-1050 Vienna, Austria

[25] Inst High Energy Phys, Protvino 142281, Russia

[26] Univ Mississippi, University, MS 38677 USA

[27] INFN, Sez Napoli, I-80126 Naples, Italy

[28] INFN, Sez Torino, I-10125 Turin, Italy

[29] Japan Atom Energy Agcy, Adv Sci Res Ctr, Naka, Ibaraki 3191195, Japan

[30] J Stefan Inst, Ljubljana 1000, Slovenia

[31] Kanagawa Univ, Yokohama, Kanagawa 2218686, Japan

[32] Karlsruher Inst Technol, Inst Expt Kernphys, D-76131 Karlsruhe, Germany

[33] Univ Tokyo, Kavli Inst Phys & Math Univ WPI, Kashiwa, Chiba 2778583, Japan

[34] Kennesaw State Univ, Kennesaw 30144, Georgia

[35] King Abdulaziz City Sci & Technol, Riyadh 11442, Saudi Arabia

[36] King Abdulaziz Univ, Fac Sci, Dept Phys, Jeddah 21589, Saudi Arabia

[37] Korea Inst Sci & Technol Informat, Daejeon 305806, South Korea

[38] Korea Univ, Seoul 136713, South Korea

[39] Kyoto Univ, Kyoto 6068502, Japan

[40] Kyungpook Natl Univ, Daegu 702701, South Korea

[41] Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland

[42] Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia

[43] Univ Ljubljana, Fac Math & Phys, Ljubljana 1000, Slovenia

[44] Ludwig Maximilians Univ Munchen, D-80539 Munich, Germany

[45] Univ Malaya, Kuala Lumpur 50603, Malaysia

[46] Univ Maribor, Maribor 2000, Slovenia

[47] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[48] Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia

[49] Univ Miyazaki, Miyazaki 8892192, Japan

[50] Moscow Phys Engn Inst, Moscow 115409, Russia

来源：

PHYSICAL REVIEW D | 2018年 / 97卷 / 01期

基金：

澳大利亚研究理事会; 中国国家自然科学基金; 俄罗斯基础研究基金会; 奥地利科学基金会; 日本学术振兴会; 瑞士国家科学基金会; 美国国家科学基金会; 新加坡国家研究基金会;

关键词：

DISPERSIVE BOUNDS; MESON DECAYS; B-DECAYS; IDENTIFICATION; MODEL;

D O I：

10.1103/PhysRevD.97.012004

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

With the full data sample of 772 x 10(6) B (B) over bar pairs recorded by the Belle detector at the KEKB electron-positron collider, the decay (B) over bar -> D+ tau(-)(nu) over bar (tau) is studied with the hadronic tau decays tau(-) -> pi(-)nu(tau) and tau(-) -> rho(-)nu(tau). The tau polarization P-tau(D*) in two-body hadronic tau decays is measured, as well as the ratio of the branching fractions R(D*) = B((B) over bar -> D*tau(-) (nu) over bar (tau))/B((B) over bar -> D*l(-) (nu) over bar (l),where l(-) denotes an electron or a muon. Our results, P-tau (D*) = - 0.38 +/- 0.51(stat)(+0.21)(-0.16) (syst) and R(D*) = 0.270 +/- 0.035(stat)(+0.028)(-0.025)(syst), are consistent with the theoretical predictions of the standard model. The polarization values of P-tau(D*) > +0.5 are excluded at the 90% confidence level.

引用

页数：17

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Measurement of the τ lepton polarization and R(D*) in the decay (B)over-bar → D*τ-(ν)over-barτ with one-prong hadronic τ decays at Belle

Measurement of the τ lepton polarization and R(D) in the decay (B)over-bar → Dτ-(ν)over-barτ with one-prong hadronic τ decays at Belle