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

Yerevan Physics Institute
Institut für Hochenergiephysik
Vienna University of Technology
European Organization for Nuclear Research
National Centre for Particle and High Energy Physics
University of Antwerp
Université Paris-Saclay
Imperial College London

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

61 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

Keywords

CMS
Higgs
Lepton-flavour-violation
Physics

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10.1016/j.physletb.2016.09.062

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@article{ffc01b05e4fc41b49e3ac74fe7fa4a81,

title = "Search for lepton flavour violating decays of the Higgs boson to eτ and eμ in proton{\textendash}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{\textendash}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 A. Zghiche and F. Beaudette and C. Charlot and O. Davignon and \{Granierde Cassagnac\}, R. and M. Nguyen and C. Ochando and P. Paganini and R. Salerno and Y. Sirois and A. Zabi and \{De Wit\}, A.",

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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TY - JOUR

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 - Zghiche, A.

AU - Beaudette, F.

AU - Charlot, C.

AU - Davignon, O.

AU - Granierde Cassagnac, R.

AU - Nguyen, M.

AU - Ochando, C.

AU - Paganini, P.

AU - Salerno, R.

AU - Sirois, Y.

AU - Zabi, A.

AU - De Wit, A.

PY - 2016/12/10

Y1 - 2016/12/10

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

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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