First test of lepton flavor universality in the charmed baryon decays Ωc0 → Ω-l+νl using data of the Belle experiment

被引：11

作者：

Li, Y. B. ^{[13
,14
]}

Shen, C. P. ^{[13
,14
]}

Adachi, I. ^{[16
,21
]}

Aihara, H. ^{[88
]}

Al Said, S. ^{[43
,82
]}

Asner, D. M. ^{[3
]}

Atmacan, H. ^{[8
]}

Aushev, T. ^{[23
]}

Ayad, R. ^{[82
]}

Babu, V. ^{[9
]}

Bahinipati, S. ^{[27
]}

Behera, P. ^{[30
]}

Belous, K. ^{[34
]}

Bennett, J. ^{[56
]}

Bernlochner, F. ^{[2
]}

Bessner, M. ^{[20
]}

Bhuyan, B. ^{[28
]}

Bilka, T. ^{[5
]}

Bobrov, A. ^{[4
,66
]}

Bodrov, D. ^{[23
,48
]}

Borah, J. ^{[28
]}

Bozek, A. ^{[63
]}

Bracko, M. ^{[40
,53
]}

Branchini, P. ^{[36
]}

Browder, T. E. ^{[20
]}

Budano, A. ^{[36
]}

Campajola, M. ^{[35
,59
]}

Cervenkov, D. ^{[5
]}

Chang, M. -C. ^{[12
]}

Chang, P. ^{[62
]}

Chekelian, V. ^{[54
]}

Chen, A. ^{[61
]}

Cheon, B. G. ^{[18
,19
]}

Chilikin, K. ^{[48
]}

Cho, H. E. ^{[18
,19
]}

Cho, K. ^{[45
]}

Cho, S. -J. ^{[94
]}

Choi, S. -K. ^{[7
]}

Choi, Y. ^{[80
]}

Choudhury, S. ^{[38
]}

Cinabro, D. ^{[92
]}

Cunliffe, S. ^{[9
]}

Dash, N. ^{[30
]}

De Nardo, G. ^{[35
,59
]}

De Pietro, G. ^{[36
]}

Dhamija, R. ^{[29
]}

Di Capua, F. ^{[35
,59
]}

Dingfelder, J. ^{[2
]}

Dolezal, Z. ^{[5
]}

V. Dong, T. ^{[10
]}

机构：

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

[2] Univ Bonn, D-53115 Bonn, Germany

[3] Brookhaven Natl Lab, Upton, NY 11973 USA

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

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

[6] Chonnam Natl Univ, Gwangju 61186, South Korea

[7] Chung Ang Univ, Seoul 06974, South Korea

[8] Univ Cincinnati, Cincinnati, OH 45221 USA

[9] DESY, D-22607 Hamburg, Germany

[10] Duy Tan Univ, Inst Theoret & Appl Res ITAR, Hanoi 100000, Vietnam

[11] Univ Florida, Gainesville, FL 32611 USA

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

[13] Fudan Univ, Key Lab Nucl Phys & Ionbeam Applicat MOE, Shanghai 200443, Peoples R China

[14] Fudan Univ, Inst Modern Phys, Shanghai 200443, Peoples R China

[15] Gifu Univ, Gifu 5011193, Japan

[16] Grad Univ Adv Studies, SOKENDAI, Hayama, Kanagawa 2400193, Japan

[17] Gyeongsang Natl Univ, Jinju 52828, South Korea

[18] Hanyang Univ, Dept Phys, Seoul 04763, South Korea

[19] Hanyang Univ, Inst Nat Sci, Seoul 04763, South Korea

[20] Univ Hawaii, Honolulu, HI 96822 USA

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

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

[23] Natl Res Univ Higher Sch Econ, Moscow 101000, Russia

[24] Forschungszentrum Julich, D-52425 Julich, Germany

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

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

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

[28] Indian Inst Technol Guwahati, Gauhati 781039, Assam, India

[29] Indian Inst Technol Hyderabad, Hyderabad 502285, Telangana, India

[30] Indian Inst Technol Madras, Chennai 600036, Tamil Nadu, India

[31] Indiana Univ, Bloomington, IN 47408 USA

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

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

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

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

[36] INFN, Sez Roma Tre, I-00146 Rome, Italy

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

[38] Iowa State Univ, Ames, IA 50011 USA

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

[40] J Stefan Inst, Ljubljana 1000, Slovenia

[41] Karlsruhe Inst Technol, Inst Expt Teilchenphys, D-76131 Karlsruhe, Germany

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

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

[44] Kitasato Univ, Sagamihara, Kanagawa 2520373, Japan

[45] Korea Inst Sci & Technol Informat, Daejeon 34141, South Korea

[46] Korea Univ, Seoul 02841, South Korea

[47] Kyungpook Natl Univ, Daegu 41566, South Korea

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

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

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

来源：

PHYSICAL REVIEW D | 2022年 / 105卷 / 09期

基金：

中国博士后科学基金; 中国国家自然科学基金; 欧洲研究理事会;

关键词：

HEAVY; IDENTIFICATION; PHYSICS; HADRON;

D O I：

10.1103/PhysRevD.105.L091101

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the first observation of the Omega(0)(c) -> Omega(-)mu(+)nu(mu) decay and present measurements of the branching fraction ratios of the Omega(0)(c) -> Omega(-)l(+)nu(l) decays compared to the reference mode Omega(0)(c) -> Omega(-)pi(+), (l = e or mu). This analysis is based on 89.5 fb(-1), 711 fb(-1), and 121.1 fb(-1) data samples collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider at the center-of-mass energies of 10.52 GeV, 10.58 GeV, and 10.86 GeV, respectively. The Omega(0)(c) signal yields are extracted by fitting M-Omega l' and M-Omega pi spectra. The branching fraction ratios B(Omega(0)(c) -> Omega(-)e(+)nu(e))/B(Omega(0)(c) -> Omega(-)pi(+)) and B(Omega(0)(c) -> Omega(-)mu(+)nu(mu))/B(Omega(0)(c) -> Omega(-)pi(+)) are measured to be 1.98 +/- 0.13(stat) +/- 0.08(syst) and 1.94 +/- 0.18(stat) +/- 0.10(syst), respectively. The ratio of B(Omega(0)(c) -> Omega(-)e(+)nu(e))/B(Omega c0 -> Omega(-)mu(+)nu(mu)) is measured to be 1.02 +/- 0.10(stat) +/- 0.02(syst), which is consistent with the expectation of lepton flavor universality.

引用

页数：7

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