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

Khachatryan, Vardan

doi:10.1016/j.physletb.2016.09.062

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

Journal Article · Thu Oct 06 00:00:00 EDT 2016 · Physics Letters. B

DOI:https://doi.org/10.1016/j.physletb.2016.09.062· OSTI ID:1294445

Khachatryan, Vardan ^[1]

Yerevan Physics Inst. (YerPhI) (Armenia). et al.

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 $$\sqrt s=$$ 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. Finally, the limits are used to constrain the corresponding flavour violating Yukawa couplings, absent in the standard model.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Organization:: CMS Collaboration

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1294445

Report Number(s):: FERMILAB-PUB-16-311-CMS; CMS-HIG-14-040; CERN-EP-2016-112; arXiv:1607.03561; 1475472

Journal Information:: Physics Letters. B, Vol. 763, Issue C; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 51 works

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