期刊
CHINESE PHYSICS C
卷 43, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1674-1137/43/1/013102
关键词
anomalous top-higgs couplings; flavor changing neutral currents; LHC
资金
- Foundation of Henan Institute of Science and Technology [2016ZD01]
- China Scholarship Council [201708410324]
- NExT Institute
- STFC CG [ST/L000296/1]
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(+)nu(l) and H -> WW*, and t (t) over bar production followed by the decay modes t -> bl(+)nu(l) and (t) over bar -> H (-> WW*)(q) over bar, where l = e, mu. Based on two types of H -> WW* decay topologies, one assuming the semileptonic decay mode H -> WW* -> l(+)nu jj and the other the fully leptonic decay mode H -> WW* -> l(+)nu l(-)(nu) over bar, 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) x 10(-3) for the same-sign di-lepton channel, and to 7.1 x 10(-4) (1.39 x 10(-3)) for the 3L channel at 3 sigma sensitivity.
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