Search for lepton-number- and baryon-number-violating tau decays at Belle

被引：6

作者：

Sahoo, D. ^{[85
,94
]}

Mohanty, G. B. ^{[85
]}

Trabelsi, K. ^{[44
]}

Adachi, I ^{[14
,19
]}

Adamczyk, K. ^{[63
]}

Aihara, H. ^{[91
]}

Al Said, S. ^{[38
,84
]}

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

Aushev, T. ^{[21
]}

Ayad, R. ^{[84
]}

Aziz, T. ^{[85
]}

Babu, V ^{[8
]}

Bahinipati, S. ^{[25
]}

Behera, P. ^{[27
]}

Bennett, J. ^{[53
]}

Bessner, M. ^{[18
]}

Bhardwaj, V ^{[24
]}

Bilka, T. ^{[5
]}

Biswal, J. ^{[35
]}

Bonvicini, G. ^{[96
]}

Bozek, A. ^{[63
]}

Bracko, M. ^{[35
,50
]}

Browder, T. E. ^{[18
]}

Campajola, M. ^{[32
,58
]}

Cao, L. ^{[2
]}

Cervenkov, D. T. ^{[5
]}

Chang, M-C ^{[10
]}

Chang, P. ^{[62
]}

Chekelian, V ^{[51
]}

Chen, A. ^{[60
]}

Cheon, B. G. ^{[16
,17
]}

Chilikin, K. ^{[45
]}

Cho, H. E. ^{[16
,17
]}

Cho, K. ^{[40
]}

Choi, S-K ^{[15
]}

Choi, Y. ^{[82
]}

Choudhury, S. ^{[26
]}

Cinabro, D. ^{[96
]}

Cunliffe, S. ^{[8
]}

Das, S. ^{[49
]}

Dash, N. ^{[27
]}

De Nardo, G. ^{[32
,58
]}

Di Capua, F. ^{[32
,58
]}

Dingfelder, J. ^{[2
]}

Dolezal, Z. ^{[5
]}

Dong, T., V ^{[11
,12
]}

Dubey, S. ^{[18
]}

Eidelman, S. ^{[4
,45
,67
]}

Epifanov, D. ^{[4
,67
]}

Ferber, T. ^{[8
]}

机构：

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

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

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

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

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

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

[7] Univ Cincinnati, Cincinnati, OH 45221 USA

[8] DESY, D-22607 Hamburg, Germany

[9] Univ Florida, Gainesville, FL 32611 USA

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

[11] Fudan Univ, Key Lab Nucl Phys & Ion Beam Applicat MOE, Shanghai 200443, Peoples R China

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

[13] Georg August Univ Gottingen, Phys Inst 2, D-37073 Gottingen, Germany

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

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

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

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

[18] Univ Hawaii, Honolulu, HI 96822 USA

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

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

[21] Higher Sch Econ HSE, Moscow 101000, Russia

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

[23] Basque Fdn Sci, Ikerbasque, Bilbao 48013, Spain

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

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

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

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

[28] Indiana Univ, Bloomington, IN 47408 USA

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

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

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

[32] Ist Nazl Fis Nucl, Sez Napoli, I-80126 Naples, Italy

[33] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy

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

[35] J Stefan Inst, Ljubljana 1000, Slovenia

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

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

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

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

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

[41] Korea Univ, Seoul 02841, South Korea

[42] Kyoto Sangyo Univ, Kyoto 6038555, Japan

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

[44] Univ Paris Saclay, IJCLab, CNRS, IN2P3, F-91405 Orsay, France

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

[46] Liaoning Normal Univ, Dalian 116029, Peoples R China

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

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

[49] Malaviya Natl Inst Technol Jaipur, Jaipur 302017, Rajasthan, India

[50] Univ Maribor, SLO-2000 Maribor, Slovenia

来源：

PHYSICAL REVIEW D | 2020年 / 102卷 / 11期

关键词：

MONTE-CARLO; IDENTIFICATION; SIMULATION;

D O I：

10.1103/PhysRevD.102.111101

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We search for lepton-number- and baryon-number-violating decays tau(-) -> (p) over bare(+)e(-), (p) over bare(-)e(-), (p) over bare(+)mu(-), (p) over bare(-)mu(+), (p) over bar mu(+)mu(-), and (p) over bar mu(-)mu(-) using 921 fb(-1) of data, equivalent to (841 +/- 12) x 10(6) tau(+)tau(-) events, recorded with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. In the absence of a signal, 90% confidence-level upper limits are set on the branching fractions of these decays in the range (1.8 - 4.0) x 10(-8). We set the world's first limits on the first four channels and improve the existing limits by an order of magnitude for the last two channels.

引用

页数：9

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