Search for the Lepton-Flavor-Violating Decays B-s(0) -> e(+/-)mu(-/+) and B-0 -> e(+/-)mu(-/+)

R. Aaij; B. Adeva; M. Adinolfi; C. Adrover; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle; A. A. Alves; S. Amato; S. Amerio; Y. Amhis; L. Anderlini; R. Andreassen; J. E. Andrews; R. B. Appleby; O. Aquines Gutierrez; F. Archilli; A. Artamonov; M. Artuso; E. Aslanides; G. Auriemma; M. Baalouch; S. Bachmann; J. J. Back; C. Baesso; V. Balagura; W. Baldini; R. J. Barlow; C. Barschel; S. Barsuk; W. Barter; Th Bauer; J. Beddow; F. Bedeschi; I. Bediaga; S. Belogurov; K. Belous; I. Belyaev; E. Ben-Haim; G. Bencivenni; S. Benson; J. Benton; A. Berezhnoy; A. Pellegrino; S. Tolk; LHCb Collaboration

doi:10.1103/PhysRevLett.111.141801

Search for the Lepton-Flavor-Violating Decays B-s(0) -> e(+/-)mu(-/+) and B-0 -> e(+/-)mu(-/+)

R. Aaij
, B. Adeva
, M. Adinolfi
, C. Adrover
, A. Affolder
, Z. Ajaltouni
, J. Albrecht
, F. Alessio
, M. Alexander
, S. Ali
, G. Alkhazov
, P. Alvarez Cartelle
, A. A. Alves
, S. Amato
, S. Amerio
, Y. Amhis
, L. Anderlini
, R. Andreassen
, J. E. Andrews
, R. B. Appleby

O. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J. J. Back, C. Baesso, V. Balagura, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, Th Bauer, J. Beddow, F. Bedeschi, I. Bediaga, S. Belogurov, K. Belous, I. Belyaev, E. Ben-Haim, G. Bencivenni, S. Benson, J. Benton, A. Berezhnoy, A. Pellegrino, S. Tolk, LHCb Collaboration

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Abstract

A search for the lepton-flavor-violating decays B-s(0) -> e(+/-)mu(-/+) and B-0 -> e(+/-)mu(-/+) is performed with a data sample, corresponding to an integrated luminosity of 1.0 fb(-1) of pp collisions at root s = 7 TeV, collected by the LHCb experiment. The observed number of B-s(0) -> e(+/-)mu(-/+) and B-0 -> e(+/-)mu(-/+) candidates is consistent with background expectations. Upper limits on the branching fractions of both decays are determined to be B(B-s(0) -> e(+/-)mu(-/+)) <1.1(1.4) x 10(-8) and B(B-0 -> e(+/-)mu(-/+)) <2.8(3.7) x 10(-9) at 90% (95%) confidence level (C.L.). These limits are a factor of 20 lower than those set by previous experiments. Lower bounds on the Pati-Salam leptoquark masses are also calculated, M-LQ(B-s(0) -> e(+/-)mu(-/+)) > 101 TeV/c(2) and M-LQ(B-0 -> e(+/-)mu -/+) > 126 TeV/c(2) at 95% C.L., and are a factor of 2 higher than the previous bounds.

Original language	English
Article number	141801
Number of pages	9
Journal	Physical Review Letters
Volume	111
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevLett.111.141801
Publication status	Published - 30-Sept-2013

Keywords

SCALAR LEPTOQUARKS
ATLAS DETECTOR
PP COLLISIONS
ROOT-S=7 TEV
PACKAGE
MESON

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Aaij, R., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., Ajaltouni, Z., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Cartelle, P. A., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., Anderlini, L., Andreassen, R., Andrews, J. E., ... LHCb Collaboration (2013). Search for the Lepton-Flavor-Violating Decays B-s(0) -> e(+/-)mu(-/+) and B-0 -> e(+/-)mu(-/+). Physical Review Letters, 111(14), Article 141801. https://doi.org/10.1103/PhysRevLett.111.141801

@article{8b147581037d4e5ca4174b75f599cc14,

title = "Search for the Lepton-Flavor-Violating Decays B-s(0) -> e(+/-)mu(-/+) and B-0 -> e(+/-)mu(-/+)",

abstract = "A search for the lepton-flavor-violating decays B-s(0) -> e(+/-)mu(-/+) and B-0 -> e(+/-)mu(-/+) is performed with a data sample, corresponding to an integrated luminosity of 1.0 fb(-1) of pp collisions at root s = 7 TeV, collected by the LHCb experiment. The observed number of B-s(0) -> e(+/-)mu(-/+) and B-0 -> e(+/-)mu(-/+) candidates is consistent with background expectations. Upper limits on the branching fractions of both decays are determined to be B(B-s(0) -> e(+/-)mu(-/+)) <1.1(1.4) x 10(-8) and B(B-0 -> e(+/-)mu(-/+)) <2.8(3.7) x 10(-9) at 90\% (95\%) confidence level (C.L.). These limits are a factor of 20 lower than those set by previous experiments. Lower bounds on the Pati-Salam leptoquark masses are also calculated, M-LQ(B-s(0) -> e(+/-)mu(-/+)) > 101 TeV/c(2) and M-LQ(B-0 -> e(+/-)mu -/+) > 126 TeV/c(2) at 95\% C.L., and are a factor of 2 higher than the previous bounds.",

keywords = "SCALAR LEPTOQUARKS, ATLAS DETECTOR, PP COLLISIONS, ROOT-S=7 TEV, PACKAGE, MESON",

author = "R. Aaij and B. Adeva and M. Adinolfi and C. Adrover and A. Affolder and Z. Ajaltouni and J. Albrecht and F. Alessio and M. Alexander and S. Ali and G. Alkhazov and Cartelle, \{P. Alvarez\} and Alves, \{A. A.\} and S. Amato and S. Amerio and Y. Amhis and L. Anderlini and R. Andreassen and Andrews, \{J. E.\} and Appleby, \{R. B.\} and Gutierrez, \{O. Aquines\} and F. Archilli and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and M. Baalouch and S. Bachmann and Back, \{J. J.\} and C. Baesso and V. Balagura and W. Baldini and Barlow, \{R. J.\} and C. Barschel and S. Barsuk and W. Barter and Th Bauer and J. Beddow and F. Bedeschi and I. Bediaga and S. Belogurov and K. Belous and I. Belyaev and E. Ben-Haim and G. Bencivenni and S. Benson and J. Benton and A. Berezhnoy and A. Pellegrino and S. Tolk and \{LHCb Collaboration\}",

year = "2013",

month = sep,

day = "30",

doi = "10.1103/PhysRevLett.111.141801",

language = "English",

volume = "111",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "AMER PHYSICAL SOC",

number = "14",

}

Aaij, R, Adeva, B, Adinolfi, M, Adrover, C, Affolder, A, Ajaltouni, Z, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G, Cartelle, PA, Alves, AA, Amato, S, Amerio, S, Amhis, Y, Anderlini, L, Andreassen, R, Andrews, JE, Appleby, RB, Gutierrez, OA, Archilli, F, Artamonov, A, Artuso, M, Aslanides, E, Auriemma, G, Baalouch, M, Bachmann, S, Back, JJ, Baesso, C, Balagura, V, Baldini, W, Barlow, RJ, Barschel, C, Barsuk, S, Barter, W, Bauer, T, Beddow, J, Bedeschi, F, Bediaga, I, Belogurov, S, Belous, K, Belyaev, I, Ben-Haim, E, Bencivenni, G, Benson, S, Benton, J, Berezhnoy, A, Pellegrino, A, Tolk, S & LHCb Collaboration 2013, 'Search for the Lepton-Flavor-Violating Decays B-s(0) -> e(+/-)mu(-/+) and B-0 -> e(+/-)mu(-/+)', Physical Review Letters, vol. 111, no. 14, 141801. https://doi.org/10.1103/PhysRevLett.111.141801

TY - JOUR

T1 - Search for the Lepton-Flavor-Violating Decays B-s(0) -> e(+/-)mu(-/+) and B-0 -> e(+/-)mu(-/+)

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Adrover, C.

AU - Affolder, A.

AU - Ajaltouni, Z.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Ali, S.

AU - Alkhazov, G.

AU - Cartelle, P. Alvarez

AU - Alves, A. A.

AU - Amato, S.

AU - Amerio, S.

AU - Amhis, Y.

AU - Anderlini, L.

AU - Andreassen, R.

AU - Andrews, J. E.

AU - Appleby, R. B.

AU - Gutierrez, O. Aquines

AU - Archilli, F.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Auriemma, G.

AU - Baalouch, M.

AU - Bachmann, S.

AU - Back, J. J.

AU - Baesso, C.

AU - Balagura, V.

AU - Baldini, W.

AU - Barlow, R. J.

AU - Barschel, C.

AU - Barsuk, S.

AU - Barter, W.

AU - Bauer, Th

AU - Beddow, J.

AU - Bedeschi, F.

AU - Bediaga, I.

AU - Belogurov, S.

AU - Belous, K.

AU - Belyaev, I.

AU - Ben-Haim, E.

AU - Bencivenni, G.

AU - Benson, S.

AU - Benton, J.

AU - Berezhnoy, A.

AU - Pellegrino, A.

AU - Tolk, S.

AU - LHCb Collaboration

PY - 2013/9/30

Y1 - 2013/9/30

N2 - A search for the lepton-flavor-violating decays B-s(0) -> e(+/-)mu(-/+) and B-0 -> e(+/-)mu(-/+) is performed with a data sample, corresponding to an integrated luminosity of 1.0 fb(-1) of pp collisions at root s = 7 TeV, collected by the LHCb experiment. The observed number of B-s(0) -> e(+/-)mu(-/+) and B-0 -> e(+/-)mu(-/+) candidates is consistent with background expectations. Upper limits on the branching fractions of both decays are determined to be B(B-s(0) -> e(+/-)mu(-/+)) <1.1(1.4) x 10(-8) and B(B-0 -> e(+/-)mu(-/+)) <2.8(3.7) x 10(-9) at 90% (95%) confidence level (C.L.). These limits are a factor of 20 lower than those set by previous experiments. Lower bounds on the Pati-Salam leptoquark masses are also calculated, M-LQ(B-s(0) -> e(+/-)mu(-/+)) > 101 TeV/c(2) and M-LQ(B-0 -> e(+/-)mu -/+) > 126 TeV/c(2) at 95% C.L., and are a factor of 2 higher than the previous bounds.

AB - A search for the lepton-flavor-violating decays B-s(0) -> e(+/-)mu(-/+) and B-0 -> e(+/-)mu(-/+) is performed with a data sample, corresponding to an integrated luminosity of 1.0 fb(-1) of pp collisions at root s = 7 TeV, collected by the LHCb experiment. The observed number of B-s(0) -> e(+/-)mu(-/+) and B-0 -> e(+/-)mu(-/+) candidates is consistent with background expectations. Upper limits on the branching fractions of both decays are determined to be B(B-s(0) -> e(+/-)mu(-/+)) <1.1(1.4) x 10(-8) and B(B-0 -> e(+/-)mu(-/+)) <2.8(3.7) x 10(-9) at 90% (95%) confidence level (C.L.). These limits are a factor of 20 lower than those set by previous experiments. Lower bounds on the Pati-Salam leptoquark masses are also calculated, M-LQ(B-s(0) -> e(+/-)mu(-/+)) > 101 TeV/c(2) and M-LQ(B-0 -> e(+/-)mu -/+) > 126 TeV/c(2) at 95% C.L., and are a factor of 2 higher than the previous bounds.

KW - SCALAR LEPTOQUARKS

KW - ATLAS DETECTOR

KW - PP COLLISIONS

KW - ROOT-S=7 TEV

KW - PACKAGE

KW - MESON

U2 - 10.1103/PhysRevLett.111.141801

DO - 10.1103/PhysRevLett.111.141801

M3 - Article

SN - 0031-9007

VL - 111

JO - Physical Review Letters

JF - Physical Review Letters

IS - 14

M1 - 141801

ER -

Search for the Lepton-Flavor-Violating Decays B-s(0) -> e(+/-)mu(-/+) and B-0 -> e(+/-)mu(-/+)

Abstract

Keywords

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