A study is presented of anomalous HVV interactions of the Higgs boson,including its CP properties. The study uses Higgs boson candidatesproduced mainly in vector boson fusion and gluon fusion thatsubsequently decay to a pair of tau leptons. The data were recorded bythe CMS experiment at the LHC in 2016 at a center-of-mass energy of 13TeV and correspond to an integrated luminosity of 35.9 fb(-1). A matrixelement technique is employed for the analysis of anomalousinteractions. The results are combined with those from the H -> 4l decaychannel presented earlier, yielding the most stringent constraints onanomalous Higgs boson couplings to electroweak vector bosons expressedas effective cross section fractions and phases: the CP-violatingparameter f(a3) cos(phi(a3)) = (0.00 +/- 0.27) x 10(-3) and theCP-conserving parameters f(a2) cos(phi(a2)) = (0.08)(-0.21)(+1.04)) x10(-3), f(Lambda 1) cos(phi(Lambda 1)) = (0.00)(-0.09)(+0.53)) x 10(-3),and f(Lambda 1)(Z gamma) cos(phi(Z gamma)(Lambda 1)) = (0.0(-1.3)(+1.1))x 10(-3). The current dataset does not allow for precise constraints onCP properties in the gluon fusion process. The results are consistentwith standard model expectations.
Constraints on anomalous HVV couplings from the production of Higgs bosons decaying to tau lepton pairs
Albergo, S.;Potenza, R.;Tricomi, A.;Tuve, C.;
2019-01-01
Abstract
A study is presented of anomalous HVV interactions of the Higgs boson,including its CP properties. The study uses Higgs boson candidatesproduced mainly in vector boson fusion and gluon fusion thatsubsequently decay to a pair of tau leptons. The data were recorded bythe CMS experiment at the LHC in 2016 at a center-of-mass energy of 13TeV and correspond to an integrated luminosity of 35.9 fb(-1). A matrixelement technique is employed for the analysis of anomalousinteractions. The results are combined with those from the H -> 4l decaychannel presented earlier, yielding the most stringent constraints onanomalous Higgs boson couplings to electroweak vector bosons expressedas effective cross section fractions and phases: the CP-violatingparameter f(a3) cos(phi(a3)) = (0.00 +/- 0.27) x 10(-3) and theCP-conserving parameters f(a2) cos(phi(a2)) = (0.08)(-0.21)(+1.04)) x10(-3), f(Lambda 1) cos(phi(Lambda 1)) = (0.00)(-0.09)(+0.53)) x 10(-3),and f(Lambda 1)(Z gamma) cos(phi(Z gamma)(Lambda 1)) = (0.0(-1.3)(+1.1))x 10(-3). The current dataset does not allow for precise constraints onCP properties in the gluon fusion process. The results are consistentwith standard model expectations.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
