Search for lepton flavour violating decays of the Higgs boson to eτ and eμ in proton-proton collisions at √s=8 TeV

被引：52

作者：

Khachatryan, V. ^{[1
]}

Sirunyan, A. M. ^{[1
]}

Tumasyan, A. ^{[1
]}

Adam, W. ^{[2
]}

Asilar, E. ^{[2
]}

Bergauer, T. ^{[2
]}

Brandstetter, J. ^{[2
]}

Brondolin, E. ^{[2
]}

Dragicevic, M. ^{[2
]}

Ero, J. ^{[2
]}

Flechl, M. ^{[2
]}

Friedl, M. ^{[2
]}

Fruehwirth, R. ^{[2
,191
]}

Ghete, V. M. ^{[2
]}

Hartl, C. ^{[2
]}

Hoermann, N. ^{[2
]}

Hrubec, J. ^{[2
]}

Jeitler, M. ^{[2
,191
]}

Knuenz, V. ^{[2
]}

Koenig, A. ^{[2
]}

Krammer, M. ^{[2
,191
]}

Kraetschmer, I. ^{[2
]}

Liko, D. ^{[2
]}

Matsushita, T. ^{[2
]}

Mikulec, I. ^{[2
]}

Rabady, D. ^{[2
]}

Rahbaran, B. ^{[2
]}

Rohringer, H. ^{[2
]}

Schieck, J. ^{[2
,191
]}

Schoefbeck, R. ^{[2
]}

Strauss, J. ^{[2
]}

Treberer-Treberspurg, W. ^{[2
]}

Waltenberger, W. ^{[2
]}

Wulz, C. -E. ^{[2
,191
]}

Mossolov, V. ^{[3
]}

Shumeiko, N. ^{[3
]}

Gonzalez, J. Suarez ^{[3
]}

Alderweireldt, S. ^{[4
]}

Cornelis, T. ^{[4
]}

DeWolf, E. A. ^{[4
]}

Janssen, X. ^{[4
]}

Knutsson, A. ^{[4
]}

Lauwers, J. ^{[4
]}

Luyckx, S. ^{[4
]}

De Klundert, M. Van ^{[4
]}

Van Haevermaet, H. ^{[4
]}

Van Mechelen, P. ^{[4
]}

Van Remortel, N. ^{[4
]}

Van Spilbeeck, A. ^{[4
]}

Abu Zeid, S. ^{[5
]}

机构：

[1] Yerevan Phys Inst, Yerevan, Armenia

[2] Inst Hochenergiephys OeAW, Vienna, Austria

[3] Natl Ctr Particle & High Energy Phys, Minsk, BELARUS

[4] Univ Antwerp, Antwerp, Belgium

[5] Vrije Univ Brussel, Brussels, Belgium

[6] Univ Libre Bruxelles, Brussels, Belgium

[7] Univ Ghent, Ghent, Belgium

[8] Catholic Univ Louvain, Louvain La Neuve, Belgium

[9] Univ Mons, Mons, Belgium

[10] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil

[11] Univ Estado Rio de Janeiro, Rio De Janeiro, Brazil

[12] Univ Estadual Paulista, Sao Paulo, Brazil

[13] Univ Fed ABC, Sao Paulo, Brazil

[14] Inst Nucl Energy Res, Sofia, Bulgaria

[15] Univ Sofia, Sofia, Bulgaria

[16] Inst High Energy Phys, Beijing, Peoples R China

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

[18] Univ Los Andes, Bogota, Colombia

[19] Univ Split, Fac Elect Engn Mech Engn & Naval Architecture, Split, Croatia

[20] Univ Split, Fac Sci, Split, Croatia

[21] Inst Rudjer Boskov, Zagreb, Croatia

[22] Univ Cyprus, Nicosia, Cyprus

[23] Charles Univ Prague, Prague, Czech Republic

[24] Acad Sci Res & Technol Arab Republ Egypt, Egyptian Network High Energy Phys, Cairo, Egypt

[25] NICPB, Tallinn, Estonia

[26] Univ Helsinki, Dept Phys, Helsinki, Finland

[27] Helsinki Inst Phys, Helsinki, Finland

[28] Lappeenranta Univ Technol, Lappeenranta, Finland

[29] Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France

[30] Ecole Polytech, IN2P3, CNRS, Lab Leprince Ringuet, Palaiseau, France

[31] Univ Strasbourg, Univ Haute Alsace Mulhouse, Inst Pluridisciplinaire Hubert Curien, CNRS IN2P3, Strasbourg, France

[32] Inst Natl Phys Nucl & Phys Particules, Ctr Calcul, CNRS, IN2P3, Villeurbanne, France

[33] Univ Claude Bernard Lyon 1, Univ Lyon, Inst Phys Nucl Lyon, CNRS IN2P3, Villeurbanne, France

[34] Georgian Tech Univ, Tbilisi, Georgia

[35] Tbilisi State Univ, Tbilisi, Georgia

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

[37] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany

[38] Rhein Westfal TH Aachen, Phys Inst B 3, Aachen, Germany

[39] DESY, Hamburg, Germany

[40] Univ Hamburg, Hamburg, Germany

[41] Inst Expt Kernphys, Karlsruhe, Germany

[42] NCSR Demokritos, Inst Nucl & Particle Phys, Aghia Paraskevi, Greece

[43] Natl & Kapodistrian Univ Athens, Athens, Greece

[44] Univ Ioannina, Ioannina, Greece

[45] Wigner Res Ctr Phys, Budapest, Hungary

[46] Inst Nucl Res ATOMKI, Debrecen, Hungary

[47] Univ Debrecen, Debrecen, Hungary

[48] Natl Inst Sci Educ & Res, Bhubaneswar, Orissa, India

[49] Panjab Univ, Chandigarh, India

[50] Univ Delhi, Delhi, India

来源：

PHYSICS LETTERS B | 2016年 / 763卷

基金：

欧洲研究理事会; 芬兰科学院; 巴西圣保罗研究基金会; 美国国家科学基金会;

关键词：

CMS; Physics; Higgs; Lepton-flavour-violation;

D O I：

10.1016/j.physletb.2016.09.062

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A direct search for lepton flavour violating decays of the Higgs boson (H) in the H. etand H. e mu channels is described. The data sample used in the search was collected in proton-proton collisions at root s= 8 TeVwith the CMS detector at the LHC and corresponds to an integrated luminosity of 19.7 fb(-1). No evidence is found for lepton flavour violating decays in either final state. Upper limits on the branching fractions, B(H. et) < 0.69% and B(H. e mu) < 0.035%, are set at the 95% confidence level. The constraint set on B(H. et) is an order of magnitude more stringent than the existing indirect limits. The limits are used to constrain the corresponding flavour violating Yukawa couplings, absent in the standard model. (C) 2016 The Author(s). Published by Elsevier B.V.

引用

页码：472 / 500

页数：29

共 83 条

[1] Search for lepton-flavour-violating H → μτ decays of the Higgs boson with the ATLAS detector
Aad, G.
Abbott, B.
Abdallah, J.
Abdinov, O.
Aben, R.
Abolins, M.
AbouZeid, O. S.
Abramowicz, H.
Abreu, H.
Abreu, R.
Abulaiti, Y.
Acharya, B. S.
Adamczyk, L.
Adams, D. L.
Adelman, J.
Adomeit, S.
Adye, T.
Affolder, A. A.
Agatonovic-Jovin, T.
Agricola, J.
Aguilar-Saavedra, J. A.
Ahlen, S. P.
Ahmadov, F.
Aielli, G.
Akerstedt, H.
Akesson, T. P. A.
Akimov, A. V.
Alberghi, G. L.
Albert, J.
Albrand, S.
Verzini, M. J. Alconada
Aleksa, M.
Aleksandrov, I. N.
Alexa, C.
Alexander, G.
Alexopoulos, T.
Alhroob, M.
Alimonti, G.
Alio, L.
Alison, J.
Alkire, S. P.
Allbrooke, B. M. M.
Allport, P. P.
Aloisio, A.
Alonso, A.
Alonso, F.
Alpigiani, C.
Altheimer, A.
Gonzalez, B. Alvarez
Piqueras, D. Alvarez
[J]. JOURNAL OF HIGH ENERGY PHYSICS, 2015, (11): : 1 - 33
[2] Evidence for the Higgs-boson Yukawa coupling to tau leptons with the ATLAS detector
Aad, G.
Abbott, B.
Abdallah, J.
Khalek, S. Abdel
Abdinov, O.
Aben, R.
Abi, B.
Abolins, M.
AbouZeid, O. S.
Abramowicz, H.
Abreu, H.
Abreu, R.
Abulaiti, Y.
Acharya, B. S.
Adamczyk, L.
Adams, D. L.
Adelman, J.
Adomeit, S.
Adye, T.
Agatonovic-Jovin, T.
Aguilar-Saavedra, J. A.
Agustoni, M.
Ahlen, S. P.
Ahmadov, F.
Aielli, G.
Akerstedt, H.
Akesson, T. P. A.
Akimoto, G.
Akimov, A. V.
Alberghi, G. L.
Albert, J.
Albrand, S.
Alconada Verzini, M. J.
Aleksa, M.
Aleksandrov, I. N.
Alexa, C.
Alexander, G.
Alexandre, G.
Alexopoulos, T.
Alhroob, M.
Alimonti, G.
Alio, L.
Alison, J.
Allbrooke, B. M. M.
Allison, L. J.
Allport, P. P.
Aloisio, A.
Alonso, A.
Alonso, F.
Alpigiani, C.
[J]. JOURNAL OF HIGH ENERGY PHYSICS, 2015, (04): : 1 - 74
[3] Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
Aad, G.
Abajyan, T.
Abbott, B.
Abdallah, J.
Khalek, S. Abdel
Abdelalim, A. A.
Abdinov, O.
Aben, R.
Abi, B.
Abolins, M.
AbouZeid, U. S.
Abramowicz, H.
Abreu, H.
Acharya, B. S.
Adamczyk, L.
Adams, D. L.
Addy, T. N.
Adelman, J.
Adomeit, S.
Adragna, P.
Adye, T.
Aefsky, S.
Aguilar-Saavedra, J. A.
Agustoni, M.
Aharrouche, M.
Ahlen, S. P.
Ahles, F.
Ahmad, A.
Ahsan, M.
Aielli, G.
Akdogan, T.
Akesson, T. P. A.
Akimoto, G.
Akimov, A. V.
Alam, M. S.
Alam, M. A.
Albert, J.
Albrand, S.
Aleksa, M.
Aleksandrov, I. N.
Alessandria, F.
Alexa, C.
Alexander, G.
Alexandre, G.
Alexopoulos, T.
Alhroob, M.
Aliev, M.
Alimonti, G.
Alison, J.
Allbrooke, B. M. M.
[J]. PHYSICS LETTERS B, 2012, 716 (01) : 1 - 29
[4] Composite Higgs-mediated flavor-changing neutral current
Agashe, Kaustubh
Contino, Roberto
[J]. PHYSICAL REVIEW D, 2009, 80 (07):
[5] GEANT4-a simulation toolkit
Agostinelli, S
Allison, J
Amako, K
Apostolakis, J
Araujo, H
Arce, P
Asai, M
Axen, D
Banerjee, S
Barrand, G
Behner, F
Bellagamba, L
Boudreau, J
Broglia, L
Brunengo, A
Burkhardt, H
Chauvie, S
Chuma, J
Chytracek, R
Cooperman, G
Cosmo, G
Degtyarenko, P
Dell'Acqua, A
Depaola, G
Dietrich, D
Enami, R
Feliciello, A
Ferguson, C
Fesefeldt, H
Folger, G
Foppiano, F
Forti, A
Garelli, S
Giani, S
Giannitrapani, R
Gibin, D
Cadenas, JJG
González, I
Abril, GG
Greeniaus, G
Greiner, W
Grichine, V
Grossheim, A
Guatelli, S
Gumplinger, P
Hamatsu, R
Hashimoto, K
Hasui, H
Heikkinen, A
Howard, A
[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2003, 506 (03) : 250 - 303
[6] A minimal set of top-Higgs anomalous couplings
Aguilar-Saavedra, J. A.
[J]. NUCLEAR PHYSICS B, 2009, 821 (1-2) : 215 - 227
[7] Electroweak and flavour structure of a warped extra dimension with custodial protection
Albrecht, Michaela E.
Blanke, Monika
Buras, Andrzej J.
Duling, Bjoern
Gemmler, Katrin
[J]. JOURNAL OF HIGH ENERGY PHYSICS, 2009, (09):
[8] Jet pair production in POWHEG
Alioli, Simone
Hamilton, Keith
Nason, Paolo
Oleari, Carlo
Re, Emanuele
[J]. JOURNAL OF HIGH ENERGY PHYSICS, 2011, (04):
[9] A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
Alioli, Simone
Nason, Paolo
Oleari, Carlo
Re, Emanuele
[J]. JOURNAL OF HIGH ENERGY PHYSICS, 2010, (06):
[10] NLO Higgs boson production via gluon fusion matched with shower in POWHEG
Alioli, Simone
Nason, Paolo
Oleari, Carlo
Re, Emanuele
[J]. JOURNAL OF HIGH ENERGY PHYSICS, 2009, (04):

← 1 2 3 4 5 6 7 8 9 →