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    Search for lepton-flavour-violating decays of the Higgs boson

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    sanders_lepton.pdf (1.398Mb)
    Issue Date
    2015-07-26
    Author
    CMS Collaboration
    Publisher
    Elsevier
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Published Version
    http://www.sciencedirect.com/science/article/pii/S0370269315005638
    Rights
    Open Access funded by SCOAP³ - Sponsoring Consortium for Open Access Publishing in Particle Physics
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    Abstract
    The first direct search for lepton-flavour-violating decays of the recently discovered Higgs boson (H) is described. The search is performed in the H→μτe and H→μτh channels, where τe and τh are tau leptons reconstructed in the electronic and hadronic decay channels, respectively. The data sample used in this search was collected in pp collisions at a centre-of-mass energy of View the MathML source with the CMS experiment at the CERN LHC and corresponds to an integrated luminosity of 19.7 fb−1. The sensitivity of the search is an order of magnitude better than the existing indirect limits. A slight excess of signal events with a significance of 2.4 standard deviations is observed. The p -value of this excess at MH=125 GeV is 0.010. The best fit branching fraction is View the MathML source. A constraint on the branching fraction, B(H→μτ)<1.51% at 95% confidence level is set. This limit is subsequently used to constrain the μ–τ Yukawa couplings to be less than 3.6×10−3.
    URI
    http://hdl.handle.net/1808/22241
    DOI
    https://doi.org/10.1016/j.physletb.2015.07.053
    Collections
    • Physics & Astronomy Scholarly Works [1711]
    Citation
    CMS Collaboration. "Search for lepton-flavour-violating decays of the Higgs boson." Physics Letters B v. 749 (2015): 337-362.

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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