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
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
收藏
页码:167 / 175
页数:9
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