Probing anomalous top-Higgs couplings at the HL-LHC via H→WW* decay channelsSupported by the Foundation of Henan Institute of Science and Technology (2016ZD01) and the China Scholarship Council (201708410324), The work of SM is supported in part by the NExT Institute and the STFC CG (ST/L000296/1)

Liu, Yao-Bei (Henan Institute of Science and Technology, Xinxiang 453003, China) ; Moretti, Stefano (School of Physics & Astronomy, University of Southampton, Highfield, Southampton SO17 1BJ, UK)

02 January 2019

Abstract: We study the prospects of probing the anomalous tHq (q = u, c) couplings via SS2L or 3L signatures at the High Luminosity (HL-LHC) run of the 14 TeV CERN collider. We focus on signals of the tH associated production followed by the decay modes t → bℓ+νℓ and H → WW*, and production followed by the decay modes t → bℓ+νℓ and , where ℓ = e,μ. Based on two types of H → WW* decay topologies, one assuming the semileptonic decay mode H → WW*→ℓ+νjj and the other the fully leptonic decay mode , we perform a full simulation for signals and backgrounds. It is shown that, at the future HL-LHC, the branching ratio Br(t → uh) (Br(t → ch)) can be probed to 1.17 (1.56) × 10−3 for the same-sign di-lepton channel, and to 7.1 × 10−4 (1.39 × 10−3) for the 3L channel at 3σ sensitivity.

Published in: Chinese Phys. C 43 (2019) 013102
Published by: Institute of Physics Publishing/Chinese Academy of Sciences
DOI: 10.1088/1674-1137/43/1/013102
arXiv: 1810.00653
License: CC-BY-3.0

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