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-1 at a centre-of-mass energy of 7TeV and 19.7fb-1 at 8TeV. 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 mH values between 115 and 130 GeV. The best fit of the observed H → ττ signal cross section times branching fraction for mH = 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.
Original language | English |
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Article number | 104 |
Journal | Journal of High Energy Physics |
Volume | 2014 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2014 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© CERN 2014
Funding
Funders | Funder number |
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Not added | ST/H00081X/2 |
National Science Foundation | 1151640, 1314131, 0906479, 1306951, 1205960, 1120138 |
Science and Technology Facilities Council | ST/L00609X/1, ST/J004901/1, ST/K003542/1, ST/K001256/1, ST/K003844/1, GRIDPP, ST/I505580/1, ST/I505572/1, ST/I005912/1, ST/J005665/1, ST/K001639/1, ST/L005603/1, ST/F007094/1 |
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung | 146730, 156687, 146398 |
Keywords
- Hadron-Hadron Scattering
- Higgs physics