UBC Faculty Research and Publications

Search for the associated production of charm quarks and a Higgs boson decaying into a photon pair with the ATLAS detector ATLAS Collaboration

Abstract

A search for the production of a Higgs boson and one or more charm quarks, in which the Higgs boson decays into a photon pair, is presented. This search uses proton-proton collision data with a centre-of-mass energy of √ s = 13 TeV and an integrated luminosity of 140 fb−1 recorded by the ATLAS detector at the Large Hadron Collider. The analysis relies on the identifcation of charm-quark-containing jets, and adopts an approach based on Gaussian process regression to model the non-resonant di-photon background. The observed (expected, assuming the Standard Model signal) upper limit at the 95% confdence level on the cross-section for producing a Higgs boson and at least one charm-quark-containing jet that passes a fducial selection is found to be 10.6 pb (8.8 pb). The observed (expected) measured cross-section for this process is 5.3 ± 3.2 pb (2.9 ± 3.1 pb).

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Rights

Attribution 4.0 International (CC BY 4.0)