Evidence for the 125 gev higgs boson decaying to a pair of τ leptons

The CMS collaboration

Research output: Contribution to journalArticle

158 Citations (Scopus)

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 languageEnglish
Article number104
JournalJournal of High Energy Physics
Volume2014
Issue number5
DOIs
Publication statusPublished - 1 Jan 2014
Externally publishedYes

Fingerprint

Higgs bosons
leptons
center of mass
muons
standard deviation
luminosity
cross sections
decay
electrons
energy

Keywords

  • Hadron-Hadron Scattering
  • Higgs physics

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Evidence for the 125 gev higgs boson decaying to a pair of τ leptons. / The CMS collaboration.

In: Journal of High Energy Physics, Vol. 2014, No. 5, 104, 01.01.2014.

Research output: Contribution to journalArticle

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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.",
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AU - Tumasyan, A.

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AU - Bergauer, T.

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AU - Schöfbeck, R.

AU - Strauss, J.

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AU - Treberer-Treberspurg, W.

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AU - Mossolov, V.

AU - Shumeiko, N.

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AB - 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.

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