A measurement of the Higgs boson Yukawa coupling to the top quark is presented using proton-proton collision data at s=13 TeV, corresponding to an integrated luminosity of 137 fb-1, recorded with the CMS detector. The coupling strength with respect to the standard model value, Yt, is determined from kinematic distributions in tt¯ final states containing ee, μμ, or eμ pairs. Variations of the Yukawa coupling strength lead to modified distributions for tt¯ production. In particular, the distributions of the mass of the tt¯ system and the rapidity difference of the top quark and antiquark are sensitive to the value of Yt. The measurement yields a best fit value of Yt=1.16-0.35+0.24, bounding Yt<1.54 at a 95% confidence level.

Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Dragicevic, M., et al. (2020). Measurement of the top quark Yukawa coupling from tt¯kinematic distributions in the dilepton final state in proton-proton collisions at s=13  TeV. PHYSICAL REVIEW D, 102(9) [10.1103/PhysRevD.102.092013].

Measurement of the top quark Yukawa coupling from tt¯kinematic distributions in the dilepton final state in proton-proton collisions at s=13  TeV

Benaglia, A.;Beschi, A.;Brivio, F.;Cetorelli, F.;Ciriolo, V.;De Guio, F.;Dinardo, M.  E.;Ghezzi, A.;Govoni, P.;Guzzi, L.;Malberti, M.;Monti, F.;Moroni, L.;Paganoni, M.;Ragazzi, S.;Tabarelli de Fatis, T.;Valsecchi, D.;Zuolo, D.;Lucchini, M.  T.;
2020

Abstract

A measurement of the Higgs boson Yukawa coupling to the top quark is presented using proton-proton collision data at s=13 TeV, corresponding to an integrated luminosity of 137 fb-1, recorded with the CMS detector. The coupling strength with respect to the standard model value, Yt, is determined from kinematic distributions in tt¯ final states containing ee, μμ, or eμ pairs. Variations of the Yukawa coupling strength lead to modified distributions for tt¯ production. In particular, the distributions of the mass of the tt¯ system and the rapidity difference of the top quark and antiquark are sensitive to the value of Yt. The measurement yields a best fit value of Yt=1.16-0.35+0.24, bounding Yt<1.54 at a 95% confidence level.
Articolo in rivista - Articolo scientifico
Physics - LHC - CMS - Top Quark
English
2020
102
9
092013
open
Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Dragicevic, M., et al. (2020). Measurement of the top quark Yukawa coupling from tt¯kinematic distributions in the dilepton final state in proton-proton collisions at s=13  TeV. PHYSICAL REVIEW D, 102(9) [10.1103/PhysRevD.102.092013].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/297217
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