Compact Muon Solenoid
LHC, CERN
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| CMS-PAS-TOP-20-007 | ||
| Search for flavor-changing neutral current interactions of the top quark and the Higgs boson in the diphoton decay channel in proton-proton collisions at $\sqrt{s}= $ 13 TeV | ||
| CMS Collaboration | ||
| June 2021 | ||
| Abstract: Proton-proton interactions resulting in the prodution of a Higgs boson with subsequent decay into two photons are studied in a search for the signature of flavor-changing neutral current interactions of top quarks and Higgs bosons. The analysis is based on data collected at a center-of-mass energy $\sqrt{s}= $ 13 TeV by the CMS detector at the LHC, corresponding to an integrated luminosity of 137 fb$^{-1}$. Multivariate machine learning techniques are used to separate signal and standard model background processes. No significant excess above the background prediction is observed, and upper limits on the $\mathrm{t} \to \mathrm{Hq}$ branching fractions are derived through a binned fit to the diphoton invariant mass spectrum. The observed (expected) 95% confidence level upper limits are found to be 1.9 $\times$ 10$^{-4}$ (3.1 $\times$ 10$^{-4}$) for $\mathcal B(\mathrm{t} \to \mathrm{Hu})$ and 7.3 $\times$ 10$^{-4}$ (5.1 $\times$ 10$^{-4}$) for $\mathcal B(\mathrm{t} \to \mathrm{Hc})$. | ||
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Links:
CDS record (PDF) ;
inSPIRE record ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, Submitted to PRL. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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