Search for the lepton-flavour violating decays B(s)0 → e± μ∓

被引：30

作者：

Aaij, R. ^{[42
]}

Adeva, B. ^{[41
]}

Adinolfi, M. ^{[50
]}

Ajaltouni, Z. ^{[5
]}

Akar, S. ^{[61
]}

Albrecht, J. ^{[10
]}

Alessio, F. ^{[42
]}

Alexander, M. ^{[55
]}

Alfonso Albero, A. ^{[40
]}

Ali, S. ^{[45
]}

Alkhazov, G. ^{[33
]}

Cartelle, P. Alvarez ^{[57
]}

Alves, A. A. ^{[61
]}

Amato, S. ^{[2
]}

Amerio, S. ^{[25
]}

Amhis, Y. ^{[7
]}

An, L. ^{[3
]}

Anderlini, L. ^{[19
]}

Andreassi, G. ^{[43
]}

Andreotti, M. ^{[17
,18
,80
]}

Andrews, J. E. ^{[62
]}

Appleby, R. B. ^{[58
]}

Archilli, F. ^{[45
]}

d'Argent, P. ^{[12
]}

Romeu, J. Arnau ^{[6
]}

Artamonov, A. ^{[39
]}

Artuso, M. ^{[63
]}

Aslanides, E. ^{[6
]}

Atzeni, M. ^{[44
]}

Auriemma, G. ^{[28
]}

Baalouch, M. ^{[5
]}

Babuschkin, I. ^{[58
]}

Bachmann, S. ^{[12
]}

Back, J. J. ^{[52
]}

Badalov, A. ^{[40
,86
]}

Baesso, C. ^{[64
]}

Baker, S. ^{[57
]}

Balagura, V. ^{[7
,75
]}

Baldini, W. ^{[17
,18
]}

Baranov, A. ^{[37
]}

Barlow, R. J. ^{[58
]}

Barschel, C. ^{[42
]}

Barsuk, S. ^{[7
]}

Barter, W. ^{[58
]}

Baryshnikov, F. ^{[34
]}

Batozskaya, V. ^{[31
]}

Battista, V. ^{[43
]}

Bay, A. ^{[43
]}

Beaucourt, L. ^{[4
]}

Beddow, J. ^{[55
]}

机构：

[1] CBPF, Rio De Janeiro, Brazil

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

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

[4] Univ Savoie Mt Blanc, LAPP, CNRS, IN2P3, Annecy Le Vieux, France

[5] Univ Blaise Pascal, Clermont Univ, CNRS, IN2P3,LPC, Clermont Ferrand, France

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

[7] Univ Paris Sud, LAL, CNRS, IN2P3, Orsay, France

[8] Univ Paris Diderot, Univ Pierre & Marie Curie, LPNHE, CNRS,IN2P3, Paris, France

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

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

[11] MPIK, Heidelberg, Germany

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

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

[14] Sez INFN Bari, Bari, Italy

[15] Sez INFN Bologna, Bologna, Italy

[16] Sez INFN Cagliari, Cagliari, Italy

[17] Univ Ferrara, Ferrara, Italy

[18] Ist Nazl Fis Nucl, Ferrara, Italy

[19] Sez INFN Firenze, Florence, Italy

[20] Lab Nazl INFN Frascati, Frascati, Italy

[21] Sez INFN Genova, Genoa, Italy

[22] Univ Milano Bicocca, Milan, Italy

[23] Ist Nazl Fis Nucl, Milan, Italy

[24] Sez Milano, Milan, Italy

[25] Sez INFN Padova, Padua, Italy

[26] Sez INFN Pisa, Pisa, Italy

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

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

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

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

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

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

[33] PNPI, Gatchina, Russia

[34] ITEP, Moscow, Russia

[35] MSU, SINP, Inst Nucl Phys, Moscow, Russia

[36] Russian Acad Sci, Inst Nucl Res, RAN, Moscow, Russia

[37] Yandex Sch Data Anal, Moscow, Russia

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

[39] IHEP, Protvino, Russia

[40] Univ Barcelona, ICCUB, Barcelona, Spain

[41] Univ Santiago de Compostela, Santiago De Compostela, Spain

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

[43] Ecole Polytech Fed Lausanne, Inst Phys, Lausanne, Switzerland

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

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

[46] Vrije Univ Amsterdam, Amsterdam, Netherlands

[47] KIPT, NSC, Kharkov, Ukraine

[48] Natl Acad Sci KINR, Inst Nucl Res, Kiev, Ukraine

[49] Univ Birmingham, Birmingham, W Midlands, England

[50] Univ Bristol, HH Wills Phys Lab, Bristol, Avon, England

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2018年 / 03期

关键词：

B physics; Branching fraction; Flavor physics; Hadron-Hadron scattering (experiments); Rare decay; MODEL;

D O I：

10.1007/JHEP03(2018)078

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

A search for the lepton-flavour violating decays B-(s)(0) -> e(+/-)mu(-/+) and B-(s)(0) -> e(+/-)mu(-/+) performed based on a sample of proton-proton collision data corresponding to an integrated luminosity of 3 fb(-1), collected with the LHCb experiment at centre-of-mass energies of 7 and 8TeV. The observed yields are consistent with the background-only hypothesis. Upper limits on the branching fraction of the B-(s)(0) -> e(+/-)mu(-/+) decays are evaluated both in the hypotheses of an amplitude completely dominated by the heavy eigenstate and by the light eigenstate. The results are B(B-s(0) -> e(+/-)mu(-/+)) < 6.3 (5.4) x 10(-9) and B(B-s(0) -> e(+/-)mu(-/+)) < 7.2(6.0) x 10(-9) at 95% (90%) confidence level, respectively. The upper limit on the branching fraction of the B-0 -> e(+/-)mu(-/+) decay is also evaluated, obtaining B(B-0 -> e(+/-)mu(-/+)) < 1.3 (1.0) x 10(-9) at 95% (90%) confidence level. These are the strongest limits on these decays to date.

引用

页数：20

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