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

CMS Collaboration

doi:10.1016/j.physletb.2016.09.062

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

CMS Collaboration

A. Alikhanian Yerevan Institute of Physics
Austrian Academy of Sciences
TU Wien
CERN
Belarusian State University
University of Antwerp
Vrije Universiteit Brussel
Université libre de Bruxelles
Peking University
Ghent University
Université catholique de Louvain
CNRS/IN2P3-Univ Mediterranee
National Institute of Chemical Physics and Biophysics, Tallinn
Lomonosov Moscow State University
Universite de Mons
Centro Brasileiro de Pesquisas Físicas
Universidade do Estado do Rio de Janeiro
Universidade Estadual de Campinas
Universidade Estadual Paulista Júlio de Mesquita Filho
Universidade Federal do ABC
CNRS
Bulgarian Academy of Sciences
Sofia University St. Kliment Ohridski
CAS - Institute of High Energy Physics
IN2P3-CNRS
Universidad de los Andes Colombia
University of Split
Ruder Boskovic Institute
University of Cyprus
Charles University
Joint Institute for Nuclear Research
Helwan University
Kyungpook National University
Academy of Scientific Research and Technology
The British University in Egypt
Texas A&M University at Qatar
University of Helsinki
Lappeenranta-Lahti University of Technology
Université Paris-Saclay
Université de Haute-Alsace
Institut Pluridisciplinaire - Hubert Curien (IPHC)
Universite Claude Bernard Lyon 1
Ivane Javakhishvili Tbilisi State University
Georgian Technical University
RWTH Aachen University
German Electron Synchrotron
University of Hamburg
Brandenburg University of Technology
Institut für Experimentelle Kernphysik
Demokritos National Centre for Scientific Research
National and Kapodistrian University of Athens
University of Ioannina
Wigner Research Centre for Physics
Institute for Nuclear Research
Eötvös Loránd University
University of Debrecen
Indian Institute of Science Education and Research Bhopal
National Institute of Science Education and Research
Panjab University
University of Delhi
Saha Institute of Nuclear Physics
Bhabha Atomic Research Centre
Tata Institute of Fundamental Research
Visva-Bharati University
Erzincan University
University of Ruhuna
Indian Institute of Science Education and Research Pune
Institute for Research for Fundamental Sciences
Isfahan University of Technology
University of Tehran
Islamic Azad University
University College Dublin
National Institute for Nuclear Physics
University of Bari
Polytechnic University of Bari
University of Bologna
University of Catania
University of Florence
University of Genoa
University of Milan - Bicocca
University of Basilicata
Università G. Marconi
University of Naples Federico II
University of Padua
University of Trento
University of Pavia
University of Perugia
University of Siena
Scuola Normale Superiore di Pisa
University of Pisa
Purdue University
Università di Roma
University of Turin
University of Eastern Piedmont
University of Trieste
Kangwon National University
Jeonbuk National University
Argonne National Laboratory
Chonnam National University
Korea University
Seoul National University
University of Seoul
Sungkyunkwan University
Vilnius University
University of Malaya
International Islamic University Malaysia
Malaysian Nuclear Agency
Centro de Investigacion y de Estudios Avanzados del Instituto Politécnico Nacional
Consejo Nacional de Ciencia y Tecnologia Mexico
Universidad Iberoamericana (UIA)
Benemerita Universidad Autonoma de Puebla
Universidad Autonoma de San Luis Potosi
The University of Auckland
University of Canterbury
Quaid-I-Azam University
National Centre for Nuclear Research
University of Warsaw
Warsaw University of Technology
Laboratório de Instrumentação e Física Experimental de Partículas
RAS - Institute for Nuclear Research
Universitàdi Roma
RAS - Saint Petersburg Nuclear Physics Institute
Peter the Great St. Petersburg Polytechnic University
Alikhanov Institute for Theoretical and Experimental Physics
Moscow Engineering Physics Institute
RAS - P.N. Lebedev Physics Institute
California Institute of Technology
Institute for High Energy Physics
University of Belgrade
CIEMAT
Universidad Autónoma de Madrid
University of Oviedo
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National Technical University of Athens
Paul Scherrer Institute
ETH Zurich—Institute for Particle Physics and Astrophysics (IPA)
University of Zurich
University of Bern
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National Taiwan University
Chulalongkorn University
Cukurova University
Gaziosmanpasa University
Mersin University
Cag University
Piri Reis University
Adiyaman University
Middle East Technical University
Ozyegin University
Izmir Institute of Technology
Istanbul Technical University
Hacettepe University
NASU - Institute for Single Crystals
NASU - Kharkov Institute of Physics and Technology
University of Bristol
Rutherford Appleton Laboratory
University of Southampton
Imperial College London
Instituto de Astrofísica de Canarias
Brunel University London
Baylor University
University of Alabama
Boston University
Brown University
University of California at Davis
University of California at Los Angeles
University of California at Riverside
University of California at San Diego
Utah Valley University
University of California at Santa Barbara
Carnegie Mellon University
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Cornell University
Fermi Natl. Accelerator Laboratory
University of Florida
Florida International University
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Florida Institute of Technology
University of Illinois at Chicago
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Helsinki Institute of Physics

Research output: Contribution to journal › Article › peer-review

60 Citations (Scopus)

Abstract

A direct search for lepton flavour violating decays of the Higgs boson (H) in the H→eτ and H→eμ channels is described. The data sample used in the search was collected in proton–proton collisions at s=8 TeV with 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→eτ)<0.69% and B(H→eμ)<0.035%, are set at the 95% confidence level. The constraint set on B(H→eτ) 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.

Original language	English
Pages (from-to)	472-500
Number of pages	29
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	763
DOIs	https://doi.org/10.1016/j.physletb.2016.09.062
Publication status	Published - 10 Dec 2016
Externally published	Yes

Keywords

CMS
Higgs
Lepton-flavour-violation
Physics

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10.1016/j.physletb.2016.09.062

Cite this

@article{7df1afc86a714020bb2d13f72353499d,

title = "Search for lepton flavour violating decays of the Higgs boson to eτ and eμ in proton–proton collisions at s=8 TeV",

abstract = "A direct search for lepton flavour violating decays of the Higgs boson (H) in the H→eτ and H→eμ channels is described. The data sample used in the search was collected in proton–proton collisions at s=8 TeV with 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→eτ)<0.69\% and B(H→eμ)<0.035\%, are set at the 95\% confidence level. The constraint set on B(H→eτ) 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.",

keywords = "CMS, Higgs, Lepton-flavour-violation, Physics",

author = "\{CMS Collaboration\} and V. Khachatryan and Sirunyan, \{A. M.\} and A. Tumasyan and W. Adam and E. Asilar and T. Bergauer and J. Brandstetter and E. Brondolin and M. Dragicevic and J. Er{\"o} and M. Flechl and M. Friedl and R. F{\"u}hwirth and Ghete, \{V. M.\} and C. Hartl and N. H{\"o}rmann and J. Hrubec and M. Jeitler and V. Kn{\"u}nz and A. K{\"o}nig and M. Krammer and I. Kr{\"a}tschmer and D. Liko and T. Matsushita and I. Mikulec and D. Rabady and B. Rahbaran and H. Rohringer and J. Schieck and R. Sch{\"o}fbeck and J. Strauss and W. Treberer-Treberspurg and W. Waltenberger and Wulz, \{C. E.\} and V. Mossolov and N. Shumeiko and \{Suarez Gonzalez\}, J. and S. Alderweireldt and T. Cornelis and \{De Wolf\}, \{E. A.\} and X. Janssen and A. Knutsson and J. Lauwers and S. Luyckx and \{Van De Klundert\}, M. and \{Van Haevermaet\}, H. and \{Van Mechelen\}, P. and \{Van Remortel\}, N. and \{Van Spilbeeck\}, A. and \{Abu Zeid\}, S.",

note = "Publisher Copyright: {\textcopyright} 2016 The Author(s)",

year = "2016",

month = dec,

day = "10",

doi = "10.1016/j.physletb.2016.09.062",

language = "English",

volume = "763",

pages = "472--500",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

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T1 - Search for lepton flavour violating decays of the Higgs boson to eτ and eμ in proton–proton collisions at s=8 TeV

AU - CMS Collaboration

AU - Khachatryan, V.

AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Asilar, E.

AU - Bergauer, T.

AU - Brandstetter, J.

AU - Brondolin, E.

AU - Dragicevic, M.

AU - Erö, J.

AU - Flechl, M.

AU - Friedl, M.

AU - Fühwirth, R.

AU - Ghete, V. M.

AU - Hartl, C.

AU - Hörmann, N.

AU - Hrubec, J.

AU - Jeitler, M.

AU - Knünz, V.

AU - König, A.

AU - Krammer, M.

AU - Krätschmer, I.

AU - Liko, D.

AU - Matsushita, T.

AU - Mikulec, I.

AU - Rabady, D.

AU - Rahbaran, B.

AU - Rohringer, H.

AU - Schieck, J.

AU - Schöfbeck, R.

AU - Strauss, J.

AU - Treberer-Treberspurg, W.

AU - Waltenberger, W.

AU - Wulz, C. E.

AU - Mossolov, V.

AU - Shumeiko, N.

AU - Suarez Gonzalez, J.

AU - Alderweireldt, S.

AU - Cornelis, T.

AU - De Wolf, E. A.

AU - Janssen, X.

AU - Knutsson, A.

AU - Lauwers, J.

AU - Luyckx, S.

AU - Van De Klundert, M.

AU - Van Haevermaet, H.

AU - Van Mechelen, P.

AU - Van Remortel, N.

AU - Van Spilbeeck, A.

AU - Abu Zeid, S.

PY - 2016/12/10

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N2 - A direct search for lepton flavour violating decays of the Higgs boson (H) in the H→eτ and H→eμ channels is described. The data sample used in the search was collected in proton–proton collisions at s=8 TeV with 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→eτ)<0.69% and B(H→eμ)<0.035%, are set at the 95% confidence level. The constraint set on B(H→eτ) 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.

AB - A direct search for lepton flavour violating decays of the Higgs boson (H) in the H→eτ and H→eμ channels is described. The data sample used in the search was collected in proton–proton collisions at s=8 TeV with 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→eτ)<0.69% and B(H→eμ)<0.035%, are set at the 95% confidence level. The constraint set on B(H→eτ) 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.

KW - CMS

KW - Higgs

KW - Lepton-flavour-violation

KW - Physics

UR - https://www.scopus.com/pages/publications/84996992941

U2 - 10.1016/j.physletb.2016.09.062

DO - 10.1016/j.physletb.2016.09.062

M3 - Article

AN - SCOPUS:84996992941

SN - 0370-2693

VL - 763

SP - 472

EP - 500

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

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

Abstract

Keywords

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