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Probing anomalous top-Higgs couplings at the HL-LHC via H→WW∗ decay channels

Probing anomalous top-Higgs couplings at the HL-LHC via H→WW∗ decay channels
Probing anomalous top-Higgs couplings at the HL-LHC via H→WW∗ decay channels

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 + ν and H → WW∗, and production followed by the decay modes t → bℓ + ν 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.

Anomalous top-higgs couplings, flavor changing neutral currents, LHC
1674-1137
Liu, Yao Bei
1e5720f9-1103-4ed9-bb45-7215c7ca4a36
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Liu, Yao Bei
1e5720f9-1103-4ed9-bb45-7215c7ca4a36
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614

Liu, Yao Bei and Moretti, Stefano (2019) Probing anomalous top-Higgs couplings at the HL-LHC via H→WW∗ decay channels. Chinese Physics C, 43 (1). (doi:10.1088/1674-1137/43/1/013102).

Record type: Article

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 + ν and H → WW∗, and production followed by the decay modes t → bℓ + ν 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.

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e-pub ahead of print date: 12 November 2018
Published date: 1 January 2019
Keywords: Anomalous top-higgs couplings, flavor changing neutral currents, LHC

Identifiers

Local EPrints ID: 427503
URI: https://eprints.soton.ac.uk/id/eprint/427503
ISSN: 1674-1137
PURE UUID: bb435909-051a-45eb-a3b5-4cc4e185a3f6

Catalogue record

Date deposited: 22 Jan 2019 17:30
Last modified: 14 Aug 2019 16:35

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