Evidence for the 125 GeV Higgs boson decaying to a pair of τ leptons
Evidence for the 125 GeV Higgs boson decaying to a pair of τ leptons
复制标题
125 GeV 希格斯玻色子衰变成一对 Ï 轻子的证据
DOI:
10.1007/jhep05(2014)104
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发表时间:
2014
影响因子:
5.4
通讯作者:
T. Müller)
中科院分区:
文献类型:
--
作者:
CMS Collaboration;Chatrchyan;Serguei (GRK 1694: J. Berger;F. Frensch;R. Friese;T. Müller)
A search for a standard model Higgs boson decaying into a pair of tau leptons is performed using events recorded by the CMS experiment at the LHC in 2011 and 2012. The dataset corresponds to an integrated luminosity of 4.9 fb(-1) at a centre-of-mass energy of 7 TeV and 19.7 fb(-1) at 8 TeV. Each tau lepton decays hadronically or leptonically to an electron or a muon, leading to six different final states for the tau-lepton pair, all considered in this analysis. An excess of events is observed over the expected background contributions, with a local significance larger than 3 standard deviations for m (H) values between 115 and 130 GeV. The best fit of the observed H -> tau tau signal cross section times branching fraction for m(H) = 125 GeV is 0.78 +/- 0.27 times the standard model expectation. These observations constitute evidence for the 125 GeV Higgs boson decaying to a pair of tau leptons.
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