A search for the Higgs boson with a mass of about 125 GeV decaying into a pair of τ leptons is performed with a data sample of proton-proton collisions, corresponding to an integrated luminosity of L=20.3 fb−1, collected with the ATLAS detector at the LHC at a centre-of-mass energy of s√=8 TeV. Final states in all τ decay combinations (both hadronic and leptonic) are examined. The observed (expected) deviation from the background-only hypothesis corresponds to a significance of 4.1 (3.2) standard deviations, and the measured signal strength is μ=1.4+0.5−0.4. This is evidence for the existence of H→τ+τ− decays, consistent with the Standard Model expectation for a Higgs boson with mH=125 GeV.
Evidence for Higgs Boson Decays to the τ+τ− Final State with the ATLAS Detector
CAVASINNI, VINCENZO
2013-01-01
Abstract
A search for the Higgs boson with a mass of about 125 GeV decaying into a pair of τ leptons is performed with a data sample of proton-proton collisions, corresponding to an integrated luminosity of L=20.3 fb−1, collected with the ATLAS detector at the LHC at a centre-of-mass energy of s√=8 TeV. Final states in all τ decay combinations (both hadronic and leptonic) are examined. The observed (expected) deviation from the background-only hypothesis corresponds to a significance of 4.1 (3.2) standard deviations, and the measured signal strength is μ=1.4+0.5−0.4. This is evidence for the existence of H→τ+τ− decays, consistent with the Standard Model expectation for a Higgs boson with mH=125 GeV.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
