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 a data sample corresponding to an integrated luminosity of 137 fb−1 recorded by the CMS experiment at the LHC in proton-proton collisions at s = 13 TeV. Events containing exactly one lepton (muon or electron) and at least three jets, among which at least two are identified as originating from the hadronization of a bottom quark, are analyzed. A set of deep neural networks is used for kinematic event reconstruction, while boosted decision trees distinguish the signal from the background events. No significant excess over the background predictions is observed, and upper limits on the signal production cross sections are extracted. These limits are interpreted in terms of top quark decay branching fractions (B) to the Higgs boson and an up (u) or a charm quark (c). Assuming one nonvanishing extra coupling at a time, the observed (expected) upper limits at 95% confidence level are B(t → Hu) < 0.079 (0.11)% and B(t → Hc) < 0.094 (0.086)%.

Tumasyan, A., Adam, W., Andrejkovic, J., Bergauer, T., Chatterjee, S., Damanakis, K., et al. (2022). Search for flavor-changing neutral current interactions of the top quark and the Higgs boson decaying to a bottom quark-antiquark pair at √s = 13 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2022(2) [10.1007/JHEP02(2022)169].

Search for flavor-changing neutral current interactions of the top quark and the Higgs boson decaying to a bottom quark-antiquark pair at √s = 13 TeV

Benaglia, A.;Boldrini, G.;Brivio, F.;Cetorelli, F.;De Guio, F.;Dinardo, M. E.;Ghezzi, A.;Govoni, P.;Guzzi, L.;Lucchini, M. T.;Malberti, M.;Massironi, A.;Moroni, L.;Paganoni, M.;Pinolini, B. S.;Ragazzi, S.;Tabarelli de Fatis, T.;Valsecchi, D.;Zuolo, D.;Ortona, G.;Gerosa, R.;
2022

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 a data sample corresponding to an integrated luminosity of 137 fb−1 recorded by the CMS experiment at the LHC in proton-proton collisions at s = 13 TeV. Events containing exactly one lepton (muon or electron) and at least three jets, among which at least two are identified as originating from the hadronization of a bottom quark, are analyzed. A set of deep neural networks is used for kinematic event reconstruction, while boosted decision trees distinguish the signal from the background events. No significant excess over the background predictions is observed, and upper limits on the signal production cross sections are extracted. These limits are interpreted in terms of top quark decay branching fractions (B) to the Higgs boson and an up (u) or a charm quark (c). Assuming one nonvanishing extra coupling at a time, the observed (expected) upper limits at 95% confidence level are B(t → Hu) < 0.079 (0.11)% and B(t → Hc) < 0.094 (0.086)%.
Articolo in rivista - Articolo scientifico
B Physics; Flavour Changing Neutral Currents; Hadron-Hadron Scattering; Higgs Physics; Top Physics;
English
21-feb-2022
2022
2022
2
169
open
Tumasyan, A., Adam, W., Andrejkovic, J., Bergauer, T., Chatterjee, S., Damanakis, K., et al. (2022). Search for flavor-changing neutral current interactions of the top quark and the Higgs boson decaying to a bottom quark-antiquark pair at √s = 13 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2022(2) [10.1007/JHEP02(2022)169].
File in questo prodotto:
File Dimensione Formato  
10281-429901_VoR.pdf

accesso aperto

Tipologia di allegato: Publisher’s Version (Version of Record, VoR)
Licenza: Creative Commons
Dimensione 1.83 MB
Formato Adobe PDF
1.83 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/429901
Citazioni
  • Scopus 14
  • ???jsp.display-item.citation.isi??? 8
Social impact