Search for the lepton-flavour violating decay D0 → e±μ∓

被引：32

作者：

Aaij, R. ^{[41
]}

Beteta, C. Abellan ^{[43
]}

Adeva, B. ^{[40
]}

Adinolfi, M. ^{[49
]}

Affolder, A. ^{[55
]}

Ajaltouni, Z. ^{[5
]}

Akar, S. ^{[6
]}

Albrecht, J. ^{[11
]}

Albrec, J. ^{[11
]}

Alessio, F. ^{[41
]}

Alexander, M. ^{[54
]}

Ali, S. ^{[44
]}

Alkhazov, G. ^{[32
]}

AlvarezCartelle, P. ^{[56
]}

Alves, A. A., Jr. ^{[60
]}

Amato, S. ^{[2
]}

Amerio, S. ^{[24
]}

Amhis, Y. ^{[7
,8
]}

An, L. ^{[3
]}

Anderlini, L. ^{[19
]}

Anderson, J. ^{[43
]}

Andreassi, G. ^{[42
]}

Andreotti, M. ^{[18
]}

Andrews, J. E. ^{[61
]}

Appleby, R. B. ^{[57
]}

Gutierrez, O. Aquines ^{[1
,12
]}

Archilli, F. ^{[41
]}

d'Argent, P. ^{[13
]}

Artamonov, A. ^{[38
]}

Artuso, M. ^{[62
]}

Aslanides, E. ^{[6
]}

Auriemma, G. ^{[27
]}

Baalouch, M. ^{[5
]}

Bachmann, S. ^{[13
]}

Back, J. J. ^{[51
]}

Badalov, A. ^{[39
]}

Baesso, C. ^{[63
]}

Baldini, W. ^{[18
,41
]}

Barlow, R. J. ^{[57
]}

Barschel, C. ^{[41
]}

Barsuk, S. ^{[7
,8
]}

Barter, W. ^{[41
]}

Batozskaya, V. ^{[30
]}

Battista, V. ^{[42
]}

Bay, A. ^{[42
]}

Beaucourt, L. ^{[4
]}

Beddow, J. ^{[54
]}

Bedeschi, F. ^{[25
]}

Bediaga, I. ^{[1
]}

Bel, L. J. ^{[44
]}

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 100084, Peoples R China

[4] Univ Savoie Mont Blanc, CNRS, IN2P3, LAPP, 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, CNRS, IN2P3, LAL, Orsay, France

[8] Univ Paris 06, Univ Paris Diderot, CNRS, IN2P3, Paris, France

[9] Univ Paris 06, Univ Paris Diderot, LPNHE, CNRS,IN2P3, Paris, France

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

[11] Tech Univ Dortmund, Fak Phys, D-44221 Dortmund, Germany

[12] MPIK, Heidelberg, Germany

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

[14] Univ Coll Dublin, Sch Phys, Dublin 2, Ireland

[15] Sez INFN Bari, Bari, Italy

[16] Sez INFN Bologna, Bologna, Italy

[17] Sez INFN Cagliari, Cagliari, Italy

[18] Sez INFN Ferrara, Ferrara, Italy

[19] Sez INFN Firenze, Florence, Italy

[20] Lab Nazl INFN Frascati, Frascati, Italy

[21] Sez INFN Genova, Genoa, Italy

[22] Sez INFN Milano Bicocca, Milan, Italy

[23] Sez INFN Milano, Milan, Italy

[24] Sez INFN Padova, Padua, Italy

[25] Sez INFN Pisa, Pisa, Italy

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

[27] Sez INFN Roma Sapienza, Rome, Italy

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

[29] AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, PL-30059 Krakow, Poland

[30] Natl Ctr Nucl Res, NCB, Warsaw, Poland

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

[32] Petersburg Nucl Phys Inst PNPI, Gatchina, Russia

[33] ITEP, Moscow, Russia

[34] Moscow MV Lomonosov State Univ, Inst Nucl Phys, SINP, Moscow, Russia

[35] Russian Acad Sci, INR, RAN, Moscow, Russia

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

[37] Novosibirsk State Univ, Novosibirsk 630090, Russia

[38] IHEP, Protvino, Russia

[39] Univ Barcelona, Barcelona, Spain

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

[41] CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland

[42] Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland

[43] Univ Zurich, Inst Phys, Schonberggasse 9, Zurich, Switzerland

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

[45] Vrije Univ Amsterdam, Amsterdam, Netherlands

[46] NSC KIPT, Kharkiv, Ukraine

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

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

[49] Univ Bristol, HH Wills Phys Lab, Tyndall Ave, Bristol BS8 1TL, Avon, England

[50] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

来源：

PHYSICS LETTERS B | 2016年 / 754卷

关键词：

NUMBER; RARE;

D O I：

10.1016/j.physletb.2016.01.029

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A search for the lepton-flavour violating decay D-0 -> e(+/-)mu(-/+) is made with a dataset corresponding to an integrated luminosity of 3.0 fb(-1) of proton-proton collisions at centre-of-mass energies of 7 TeV and 8 TeV, collected by the LHCb experiment. Candidate D-0 mesons are selected using the decay D*(+) -> D-0 pi(+) and the D-0 -> e(+/-)mu(+) branching fraction is measured using the decay mode D-0 -> K-pi(+) as a normalization channel. No significant excess of D-0 -> e(+/-)mu(-/+) candidates over the expected background is seen, and a limit is set on the branching fraction, B(D-0 -> e(+/-)mu(-/+)) < 1.3 x10(-8), at 90% confidence level. This is an order of magnitude lower than the previous limit and it further constrains the parameter space in some leptoquark models and in supersymmetric models with R-parity violation. (C) 2016 CERN for the benefit of the LHCb Collaboration. Published by Elsevier B.V.

引用

页码：167 / 175

页数：9

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