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Preprint
Report number arXiv:2407.15172 ; CMS-TOP-22-002 ; CERN-EP-2024-174 ; CMS-TOP-22-002-003
Title Search for flavor-changing neutral current interactions of the top quark mediated by a Higgs boson in proton-proton collisions at 13 TeV
Related supersedes: CMS-PAS-TOP-22-002
Author(s) CMS Collaboration  Visualizza tutti i 2333 autori
Corporate author(s) CMS Collaboration
Publication 2024
Imprint 21 Jul 2024
Number of pages 41
Note Submitted to Physical Review D. All figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-22-002 (CMS Public Pages)
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; CMS
Keywords top physics
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 fb1. 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 95% confidence level are found to be 0.072% (0.059%) for B(tHu) and 0.043% (0.062%) for B(tHc). 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 with a pair of photons or of bottom quarks. The resulting observed (expected) upper limits at 95% confidence level are 0.019% (0.027%) for B(tHu) and 0.037% (0.035%) for B(tHc). These results constitute the most stringent limits on these branching fractions to date.
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Copyright/License Preprint: © 2024-2025 CERN (License: CC-BY-4.0)
Submitted by cms-publication-committee-chair@cern.ch



 
 Record creato 2024-07-21, modificato l'ultima volta il 2024-12-26


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