A measurement of the H → τ τ signal strength is performed using events recorded in proton–proton collisions by the CMS experiment at the LHC in 2016 at a center-of-mass energy of 13 TeV. The data set corresponds to an integrated luminosity of 35.9 fb . The H → ττ signal is established with a significance of 4.9 standard deviations, to be compared to an expected significance of 4.7 standard deviations. The best fit of the product of the observed H → τ τ signal production cross section and branching fraction is 1.09+0.27 times the standard model expectation. The combination with the −0.26 corresponding measurement performed with data collected by the CMS experiment at center-of-mass energies of 7 and 8 TeV leads to an observed significance of 5.9 standard deviations, equal to the expected significance. This is the first observation of Higgs boson decays to τ leptons by a single experiment.

Observation of the Higgs boson decay to a pair of τ leptons with the CMS detector

Abbrescia, M.;Calabria, C.;De Palma, M.;Errico, F.;Lezki, S.;Miniello, G.;My, S.;Nuzzo, S.;Pompili, A.;Radogna, R.;Selvaggi, G.;Venditti, R.;
2018-01-01

Abstract

A measurement of the H → τ τ signal strength is performed using events recorded in proton–proton collisions by the CMS experiment at the LHC in 2016 at a center-of-mass energy of 13 TeV. The data set corresponds to an integrated luminosity of 35.9 fb . The H → ττ signal is established with a significance of 4.9 standard deviations, to be compared to an expected significance of 4.7 standard deviations. The best fit of the product of the observed H → τ τ signal production cross section and branching fraction is 1.09+0.27 times the standard model expectation. The combination with the −0.26 corresponding measurement performed with data collected by the CMS experiment at center-of-mass energies of 7 and 8 TeV leads to an observed significance of 5.9 standard deviations, equal to the expected significance. This is the first observation of Higgs boson decays to τ leptons by a single experiment.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11586/215257
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