Search for the Rare Decays Bs0 → e+ e- and B0 → e+ e-

被引：19

作者：

Aaij, R. ^{[31
]}

Beteta, C. Abellan ^{[49
]}

Ackernley, T. ^{[59
]}

Adeva, B. ^{[45
]}

Adinolfi, M. ^{[53
]}

Afsharnia, H. ^{[9
]}

Aidala, C. A. ^{[67
,81
]}

Aiola, S. ^{[25
]}

Ajaltouni, Z. ^{[9
]}

Akar, S. ^{[66
]}

Albicocco, P. ^{[22
]}

Albrecht, J. ^{[14
]}

Alessio, F. ^{[47
]}

Alexander, M. ^{[58
]}

Alfonso Albero, A. ^{[44
]}

Alkhazov, G. ^{[37
]}

Cartelle, P. Alvarez ^{[60
]}

Alves, A. A., Jr. ^{[45
]}

Amato, S. ^{[2
]}

Amhis, Y. ^{[11
]}

An, L. ^{[21
]}

Anderlini, L. ^{[21
]}

Andreassi, G. ^{[48
]}

Andreotti, M. ^{[20
]}

Archilli, F. ^{[16
]}

Artamonov, A. ^{[43
]}

Artuso, M. ^{[67
]}

Arzymatov, K. ^{[41
]}

Aslanides, E. ^{[10
]}

Atzeni, M. ^{[49
]}

Audurier, B. ^{[11
]}

Bachmann, S. ^{[16
]}

Back, J. J. ^{[55
]}

Baker, S. ^{[60
]}

Balagura, V ^{[11
,82
]}

Baldini, W. ^{[20
]}

Baranov, A. ^{[41
]}

Barlow, R. J. ^{[61
]}

Barsuk, S. ^{[11
]}

Barter, W. ^{[60
]}

Bartolini, M. ^{[23
,47
,83
]}

Baryshnikov, F. ^{[38
,78
]}

Basels, J. M. ^{[13
]}

Bassi, G. ^{[28
]}

Batozskaya, V ^{[35
]}

Batsukh, B. ^{[67
]}

Battig, A. ^{[14
]}

Bay, A. ^{[48
]}

Becker, M. ^{[14
]}

Bedeschi, F. ^{[28
]}

机构：

[1] Ctr Brasileiro Pesquisas Fis CBPF, Rio De Janeiro, Brazil

[2] Univ Fed Rio de Janeiro UFRJ, Rio De Janeiro, Brazil

[3] Tsinghua Univ, Ctr High Energy Phys, Beijing, Peoples R China

[4] Peking Univ, State Key Lab Nucl Phys & Technol, Sch Phys, Beijing, Peoples R China

[5] Univ Chinese Acad Sci, Beijing, Peoples R China

[6] Inst High Energy Phys IHEP, Beijing, Peoples R China

[7] Cent China Normal Univ, Inst Particle Phys, Wuhan, Hubei, Peoples R China

[8] Univ Grenoble Alpes, Univ Savoie Mt Blanc, CNRS, IN2P3 LAPP, Annecy, France

[9] Univ Clermont Auvergne, LPC, IN2P3, CNRS, Clermont Ferrand, France

[10] Aix Marseille Univ, CPPM, IN2P3, CNRS, Marseille, France

[11] Univ Paris Saclay, IJCLab, IN2P3, CNRS, Orsay, France

[12] Sorbonne Univ, IN2P3, CNRS, Paris Diderot Sorbonne Paris Cite,LPNHE, Paris, France

[13] Rhein Westfal TH Aachen, Phys Inst 1, Aachen, Germany

[14] Tech Univ Dortmund, Fak Phys, Dortmund, Germany

[15] Max Planck Inst Kernphys MPIK, Heidelberg, Germany

[16] Heidelberg Univ, Phys Inst, Heidelberg, Germany

[17] Univ Coll Dublin, Sch Phys, Dublin, Ireland

[18] INFN, Sez Bari, Bari, Italy

[19] INFN, Sez Bologna, Bologna, Italy

[20] INFN, Sez Ferrara, Ferrara, Italy

[21] INFN, Sez Firenze, Florence, Italy

[22] INFN, Lab Nazl Frascati, Frascati, Italy

[23] INFN, Sez Genova, Genoa, Italy

[24] INFN, Sez Milano Bicocca, Milan, Italy

[25] INFN, Sez Milano, Milan, Italy

[26] INFN, Sez Cagliari, Monserrato, Italy

[27] INFN, Sez Padova, Padua, Italy

[28] INFN, Sez Pisa, Pisa, Italy

[29] INFN, Sez Roma Tor Vergata, Rome, Italy

[30] INFN, Sez Roma La Sapienza, Rome, Italy

[31] Nikhef Natl Inst Subat Phys, Amsterdam, Netherlands

[32] Vrije Univ Amsterdam, Amsterdam, Netherlands

[33] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Krakow, Poland

[34] AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, Krakow, Poland

[35] Natl Ctr Nucl Res NCBJ, Warsaw, Poland

[36] Horia Hulubei Natl Inst Phys & Nucl Engn, Bucharest, Romania

[37] NRC Kurchatov Inst PNPI NRC KI, Petersburg Nucl Phys Inst, Gatchina, Russia

[38] NRC Kurchatov Inst ITEP NRC KI, Inst Theoret & Expt Phys, Moscow, Russia

[39] Moscow State Univ SINP MSU, Inst Nucl Phys, Moscow, Russia

[40] Russian Acad Sci INR RAS, Inst Nucl Res, Moscow, Russia

[41] Yandex Sch Data Anal, Moscow, Russia

[42] Budker Inst Nucl Phys SB RAS, Novosibirsk, Russia

[43] NRC Kurchatov Inst IHEP NRC KI, Inst High Energy Phys, Protvino, Russia

[44] Univ Barcelona, ICCUB, Barcelona, Spain

[45] Univ Santiago de Compostela, Inst Galego Fis Altas Enerxias IGFAE, Santiago De Compostela, Spain

[46] Univ Valencia, Ctr Mixto, Inst Fis Corpuscular, CSIC, Valencia, Spain

[47] CERN, European Org Nucl Res, Geneva, Switzerland

[48] Ecole Polytech Fed Lausanne EPFL, Inst Phys, Lausanne, Switzerland

[49] Univ Zurich, Phys Inst, Zurich, Switzerland

[50] NSC Kharkiv Inst Phys & Technol NSC KIPT, Kharkiv, Ukraine

来源：

PHYSICAL REVIEW LETTERS | 2020年 / 124卷 / 21期

关键词：

931.3 Atomic and Molecular Physics;

D O I：

10.1103/PhysRevLett.124.211802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A search for the decays B-s(0) -> e(+)e(-) and B-0 e(+)e(-) is performed using data collected with the LHCb experiment in proton-proton collisions at center-of-mass energies of 7, 8, and 13 TeV, corresponding to integrated luminosities of 1, 2, and 2 fb(-1), respectively. No signal is observed. Assuming no contribution from B-0 -> e(+)e(-) decays, an upper limit on the branching fraction B(B-s(0) -> e(+)e(-)) < 9.4(11.2) x 10(-9) is obtained at 90(95)% confidence level. If no B-s(0) -> e(+)e(-) contribution is assumed, a limit of B(B-0 -> e(+)e(-)) < 2.5(3.0) x 10(-9) is determined at 90(95)% confidence level. These upper limits are more than one order of magnitude lower than the previous values.

引用

页数：11

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