A search for flavor-changing neutral current interactions of the top quark (t) and the Higgs boson (H)is presented. The search is based on proton-proton collision data collected in 2016–2018 at a center-of-mass energy of 13 TeV with the CMS detector at the LHC, and corresponding to an integrated luminosity of 138 fb−1. Events containing a pair of leptons with the same-sign electric charge and at least one jet are considered. The results are used to constrain the branching fraction (B) of the top quark decaying to a Higgs boson and an up (u) or charm (c) quark. No significant excess above the estimated background was found. The observed (expected) upper limits at a 95% confidence level are found to be 0.072% (0.059%) for B(t → Hu) and 0.043% (0.062%) for B(t → Hc). These results are combined with two other searches performed by the CMS Collaboration for flavor-changing neutral current interactions of top quarks and Higgs bosons in final states where the Higgs boson decays to either a pair of photons or a pair of bottom quarks. The resulting observed (expected) upper limits at the 95% confidence level are 0.019% (0.027%) for B(t → Hu) and 0.037% (0.035%) for B(t → Hc).

Hayrapetyan, A., Tumasyan, A., Adam, W., Andrejkovic, J. w., Bergauer, T., Chatterjee, S., et al. (2025). Search for flavor-changing neutral current interactions of the top quark mediated by a Higgs boson in proton-proton collisions at 13 TeV. PHYSICAL REVIEW D, 112(3), 1-25 [10.1103/95q6-vvlp].

Search for flavor-changing neutral current interactions of the top quark mediated by a Higgs boson in proton-proton collisions at 13 TeV

Iemmi, F.;Battilana, C.;Bonacorsi, D.;Borgonovi, L.;Castro, A.;Cuffiani, M.;Diotalevi, T.;Fanfani, A.;Giommi, L.;Guiducci, L.;Rovelli, T.;Siroli, G.  P.;Fontanesi, E.;
2025

Abstract

A search for flavor-changing neutral current interactions of the top quark (t) and the Higgs boson (H)is presented. The search is based on proton-proton collision data collected in 2016–2018 at a center-of-mass energy of 13 TeV with the CMS detector at the LHC, and corresponding to an integrated luminosity of 138 fb−1. Events containing a pair of leptons with the same-sign electric charge and at least one jet are considered. The results are used to constrain the branching fraction (B) of the top quark decaying to a Higgs boson and an up (u) or charm (c) quark. No significant excess above the estimated background was found. The observed (expected) upper limits at a 95% confidence level are found to be 0.072% (0.059%) for B(t → Hu) and 0.043% (0.062%) for B(t → Hc). These results are combined with two other searches performed by the CMS Collaboration for flavor-changing neutral current interactions of top quarks and Higgs bosons in final states where the Higgs boson decays to either a pair of photons or a pair of bottom quarks. The resulting observed (expected) upper limits at the 95% confidence level are 0.019% (0.027%) for B(t → Hu) and 0.037% (0.035%) for B(t → Hc).
2025
Hayrapetyan, A., Tumasyan, A., Adam, W., Andrejkovic, J. w., Bergauer, T., Chatterjee, S., et al. (2025). Search for flavor-changing neutral current interactions of the top quark mediated by a Higgs boson in proton-proton collisions at 13 TeV. PHYSICAL REVIEW D, 112(3), 1-25 [10.1103/95q6-vvlp].
Hayrapetyan, A.; Tumasyan, A.; Adam, W.; Andrejkovic, J.  w.; Bergauer, T.; Chatterjee, S.; Damanakis, K.; Dragicevic, M.; Hussain, P.  s.; Jeitler, M...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1041600
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