Evidence for the 125 GeV Higgs boson decaying to a pair of τ leptons
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Chatrchyan-2014-Evidence for the 125.pdf
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1.57 MB
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Checksum (MD5)
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Author(s)
Apyan, Aram
Busza, Wit
Cali, Ivan Amos
Chan, M.
Di Matteo, Leonardo
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Gulhan, Doga Can
Klute, Markus
Lai, Yue Shi
Date Issued
May 2014
Journal
Journal of High Energy Physics
Publisher
Springer-Verlag
Citation
Chatrchyan, S., V. Khachatryan, A.M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, et al. “Evidence for the 125 GeV Higgs Boson Decaying to a Pair of τ Leptons.” J. High Energ. Phys. 2014, no. 5 (May 2014). © CERN, for the benefit of the CMS Collaboration
Version
Final published version
Abstract
A search for a standard model Higgs boson decaying into a pair of τ 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[superscript −1] at a centre-of-mass energy of 7 TeV and 19.7 fb[superscript −1] at 8 TeV. Each τ lepton decays hadronically or leptonically to an electron or a muon, leading to six different final states for the τ -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 [subscript H] values between 115 and 130 GeV. The best fit of the observed H → τ τ signal cross section times branching fraction for m [subscript 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 τ leptons.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Massachusetts Institute of Technology. School of Science
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DOI of Published Version
https://doi.org/10.1007/jhep05(2014)104
