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Search for lepton-flavour-violating decays of the Higgs boson
CMS Collaboration
2015
发表期刊PHYSICS LETTERS B
卷号749页码:337-362
摘要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 -> mu tau(e) and H -> mu tau(h) channels, where tau(e) and tau(h) 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 root s = 8 TeV 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 M-H = 125 GeV is 0.010. The best fit branching fraction is beta(H -> mu tau) = (0.84(-0.37)(+0.39))%. A constraint on the branching fraction, beta(H -> mu tau) < 1.51% at 95% confidence level is set. This limit is subsequently used to constrain the mu-tau Yukawa couplings to be less than 3.6 x 10(-3). (C) 2015 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V.
文章类型Article
关键词CMS Physics Higgs Muons Taus Lepton-flavour-violation
学科领域Astronomy & Astrophysics; Physics
DOI10.1016/j.physletb.2015.07.053
收录类别SCI
WOS类目Astronomy & Astrophysics ; Physics, Nuclear ; Physics, Particles & Fields
WOS记录号WOS:000361562900048
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被引频次:143[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/229016
专题粒子天体物理中心
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CMS Collaboration. Search for lepton-flavour-violating decays of the Higgs boson[J]. PHYSICS LETTERS B,2015,749:337-362.
APA CMS Collaboration.(2015).Search for lepton-flavour-violating decays of the Higgs boson.PHYSICS LETTERS B,749,337-362.
MLA CMS Collaboration."Search for lepton-flavour-violating decays of the Higgs boson".PHYSICS LETTERS B 749(2015):337-362.
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