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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
Evidence for the 125 GeV Higgs boson decaying to a pair of τ leptons
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 7 TeV and 19.7 fb−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 mH values between 115 and 130 GeV. The best fit of the observed H → τ τ 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.
1029-8479
104
Chatrchyan, Serguei
23ce6af5-bdd2-435c-92c8-9b1b71a261ee
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
Chatrchyan, Serguei
23ce6af5-bdd2-435c-92c8-9b1b71a261ee
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

Chatrchyan, Serguei and Belyaev, Alexander (2014) Evidence for the 125 GeV Higgs boson decaying to a pair of τ leptons. Journal of High Energy Physics, 05, 104. (doi:10.1007/JHEP05(2014)104).

Record type: Article

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 7 TeV and 19.7 fb−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 mH values between 115 and 130 GeV. The best fit of the observed H → τ τ 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.

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Published date: 2014
Organisations: Physics & Astronomy

Identifiers

Local EPrints ID: 410507
URI: http://eprints.soton.ac.uk/id/eprint/410507
ISSN: 1029-8479
PURE UUID: c500e181-92df-4504-b28d-1bf2deb92404
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

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Date deposited: 09 Jun 2017 09:01
Last modified: 17 Dec 2019 01:44

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Author: Serguei Chatrchyan

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