Search for B+ → K+ν(ν)over-bar Decays Using an Inclusive Tagging Method at Belle H

被引：39

作者：

Abudinen, F. ^{[45
]}

Adachi, I ^{[20
,22
]}

Adamczyk, K. ^{[67
]}

Ahlburg, P. ^{[98
]}

Aihara, H. ^{[114
]}

Akopov, N. ^{[120
]}

Aloisio, A. ^{[38
,87
]}

Ky, N. Anh ^{[12
,35
]}

Asner, D. M. ^{[2
]}

Atmacan, H. ^{[100
]}

Aushev, T. ^{[24
]}

Aushev, V ^{[80
]}

Baur, A. ^{[10
]}

Babu, V ^{[10
]}

Baehr, S. ^{[49
]}

Bambade, P. ^{[95
]}

Banerjee, Sw ^{[104
]}

Bansal, S. ^{[73
]}

Baudot, J. ^{[96
]}

Becker, J. ^{[49
]}

Behera, P. K. ^{[28
]}

Bennett, J., V ^{[108
]}

Bernieri, E. ^{[43
]}

Bernlochner, F. U. ^{[98
]}

Bertemes, M. ^{[31
]}

Bertholet, E. ^{[83
]}

Bessner, M. ^{[102
]}

Bettarini, S. ^{[41
,90
]}

Bianchi, F. ^{[44
,92
]}

Bilka, T. ^{[6
]}

Biswas, D. ^{[104
]}

Bozek, A. ^{[67
]}

Bracko, M. ^{[79
,106
]}

Branchini, P. ^{[43
]}

Braun, N. ^{[49
]}

Browder, T. E. ^{[102
]}

Budano, A. ^{[43
]}

Bussino, S. ^{[43
,91
]}

Campajola, M. ^{[38
,87
]}

Cao, L. ^{[98
]}

Casarosa, G. ^{[41
,90
]}

Cecchi, C. ^{[40
,89
]}

Cervenkov, D. ^{[6
]}

Chang, P. ^{[66
]}

Cheaib, R. ^{[10
]}

Chekelian, V ^{[60
]}

Chen, C. ^{[50
]}

Chen, Y-T ^{[66
]}

Cheon, B. G. ^{[21
]}

Chilikin, K. ^{[55
]}

机构：

[1] Aix Marseille Univ, CPPM, CNRS IN2P3, F-13288 Marseille, France

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

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

[4] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[5] Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Mexico City 07360, DF, Mexico

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

[7] Chiang Mai Univ, Chiang Mai 50202, Thailand

[8] Chiba Univ, Chiba 2638522, Japan

[9] Consejo Nacl Ciencia & Technol, Mexico City 03940, DF, Mexico

[10] DESY, D-22607 Hamburg, Germany

[11] Duke Univ, Durham, NC 27708 USA

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

[13] ENEA Casaccia, I-00123 Rome, Italy

[14] Univ Tokyo, Earthquake Res Inst, Tokyo 1130032, Japan

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

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

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

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

[19] Gifu Univ, Gifu 5011193, Japan

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

[21] Hanyang Univ, Dept Phys & Inst Nat Sci, Seoul 04763, South Korea

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

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

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

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

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

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

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

[29] Indiana Univ, Bloomington, IN 47408 USA

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

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

[32] Hiroshima Univ, Higashihiroshima, Hiroshima 7398530, Japan

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

[34] Inst Particle Phys Canada, Victoria, BC V8W 2Y2, Canada

[35] Vietnam Acad Sci & Technol VAST, Inst Phys, Hanoi, Vietnam

[36] Inst Fis Corpuscular, I-46980 Paterna, Italy

[37] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

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

[39] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy

[40] Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy

[41] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy

[42] Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy

[43] Ist Nazl Fis Nucl, Sez Roma Tre, I-00146 Rome, Italy

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

[45] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy

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

[47] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany

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

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

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

来源：

PHYSICAL REVIEW LETTERS | 2021年 / 127卷 / 18期

基金：

以色列科学基金会; 欧盟地平线“2020”; 欧洲研究理事会; 加拿大自然科学与工程研究理事会; 美国国家科学基金会; 日本学术振兴会; 澳大利亚研究理事会; 中国国家自然科学基金; 新加坡国家研究基金会; 奥地利科学基金会;

关键词：

We thank the SuperKEKB group for the excellent operation of the accelerator; the KEK cryogenics group for the efficient operation of the solenoid; the KEK computer group for on-site computing support; and the raw-data centers at BNL; DESY; GridKa; IN2P3; and INFN for off-site computing support. This work was supported by the following funding sources: Science Committee of the Republic of Armenia Grant No. 20TTCG-1C010; Australian Research Council and research Grants No. DP180102629; No; DP170102389; DP170102204; DP150103061; FT130100303; FT130100018; and No. FT120100745; Austrian Federal Ministry of Education; Science and Research; Austrian Science Fund No. P 31361-N36; and Horizon 2020 ERC Starting Grant No. 947006 InterLeptons; Natural Sciences and Engineering Research Council of Canada; Compute Canada; and CANARIE; Chinese Academy of Sciences and research Grant No. QYZDJ-SSW-SLH011; National Natural Science Foundation of China and research Grants No. 11521505; 11575017; 11675166; 11761141009; 11705209; and No. 11975076; LiaoNing Revitalization Talents Program under Contract No. XLYC1807135; Shanghai Municipal Science and Technology Committee under Contract No. 19ZR1403000; Shanghai Pujiang Program under Grant No. 18PJ1401000; and the CAS Center for Excellence in Particle Physics (CCEPP); the Ministry of Education; Youth; and Sports of the Czech Republic under Contract No. LTT17020 and Charles University Grants No. SVV 260448 and No. GAUK 404316; European Research Council; Seventh Framework PIEF-GA-2013-622527; Horizon 2020 ERC-Advanced Grants No. 267104 and No. 884719; Horizon 2020 ERC-Consolidator Grant No. 819127; Horizon 2020 Marie Sklodowska-Curie Grant Agreement No. 700525 NIOBE; and Horizon 2020 Marie Sklodowska-Curie RISE project JENNIFER2 Grant Agreement No. 822070 (European grants); L’Institut National de Physique Nucléaire et de Physique des Particules (IN2P3) du CNRS (France); BMBF; DFG; HGF; MPG; and AvH Foundation (Germany); Department of Atomic Energy under Project Identification No. RTI 4002 and Department of Science and Technology (India); Israel Science Foundation Grant No. 2476/17; U.S.-Israel Binational Science Foundation Grant No. 2016113; and Israel Ministry of Science Grant No. 3-16543; Istituto Nazionale di Fisica Nucleare and the research grants BELLE2; Japan Society for the Promotion of Science; Grant-in-Aid for Scientific Research Grants No. 16H03968; 16H03993; 16H06492; 16K05323; 17H01133; 17H05405; 18K03621; 18H03710; 18H05226; 19H00682; 26220706; and No. 26400255; the National Institute of Informatics; and Science Information NETwork 5 (SINET5); and the Ministry of Education; Culture; Sports; Science; and Technology (MEXT) of Japan; National Research Foundation (NRF) of Korea Grants No. 2016R1D1A1B01010135; 2016R1D1A1B02012900; 2018R1A2B3003643; 2018R1A6A1A06024970; 2018R1D1A1B07047294; 2019K1A3A7A09033840; and No. 2019R1I1A3A01058933; Radiation Science Research Institute; Foreign Large-size Research Facility Application Supporting project; the Global Science Experimental Data Hub Center of the Korea Institute of Science and Technology Information; and KREONET/GLORIAD; Universiti Malaya RU grant; Akademi Sains Malaysia; and Ministry of Education Malaysia; Frontiers of Science Program Contracts No. FOINS-296; CB-221329; CB-236394; CB-254409; and No. CB-180023; and SEP-CINVESTAV research Grant No. 237 (Mexico); the Polish Ministry of Science and Higher Education and the National Science Center; the Ministry of Science and Higher Education of the Russian Federation; Agreement No. 14.W03.31.0026; and the HSE University Basic Research Program; Moscow; University of Tabuk research Grants No. S-0256-1438 and No. S-0280-1439 (Saudi Arabia); Slovenian Research Agency and research Grants;

D O I：

10.1103/PhysRevLett.127.181802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A search for the flavor-changing neutral-current decay B+ -> K+nu(nu) over bar is performed at the Belle II experiment at the SuperKEKB asymmetric energy electron-positron collider. The data sample corresponds to an integrated luminosity of 63 fb(-1) collected at the Upsilon(4S) resonance and a sample of 9 fb(-1) collected at an energy 60 MeV below the resonance. Because the measurable decay signature involves only a single charged kaon, a novel measurement approach is used that exploits not only the properties of the B+ -> K+nu(nu) over bar decay, but also the inclusive properties of the other B meson in the Upsilon(4S) -> B (B) over bar event, to suppress the background from other B meson decays and light-quark pair production. This inclusive tagging approach offers a higher signal efficiency compared to previous searches. No significant signal is observed. An upper limit on the branching fraction of B+ -> K+nu(nu) over bar of 4.1 x 10(-5) is set at the 90% confidence level.

引用

页数：10

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