Search for a vector-like quark T' → tH via the diphoton decay mode of the Higgs boson in proton-proton collisions at √s = 13 TeV
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Abstract
A search for the electroweak production of a vector-like quark T' , decaying to a top quark and a Higgs boson is presented. The search is based on a sample of proton-proton collision events recorded at the LHC at √ s = 13 TeV, corresponding to an integrated luminosity of 138 fb−1 . This is the first T' search that exploits the Higgs boson decay to a pair of photons. For narrow isospin singlet T' states with masses up to 1.1 TeV, the excellent diphoton invariant mass resolution of 1–2% results i ...
A search for the electroweak production of a vector-like quark T' , decaying to a top quark and a Higgs boson is presented. The search is based on a sample of proton-proton collision events recorded at the LHC at √ s = 13 TeV, corresponding to an integrated luminosity of 138 fb−1 . This is the first T' search that exploits the Higgs boson decay to a pair of photons. For narrow isospin singlet T' states with masses up to 1.1 TeV, the excellent diphoton invariant mass resolution of 1–2% results in an increased sensitivity compared to previous searches based on the same production mechanism. The electroweak production of a T' quark with mass up to 960 GeV is excluded at 95% confidence level, assuming a coupling strength κT = 0.25 and a relative decay width Γ/MT' < 5%. ...
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The journal of high energy physics. Trieste. No. 9 (Sept. 2023), 57, 40 p.
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