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

作　　者：Yao-Bei Liu Stefano Moretti 刘要北;Stefano Moretti

机构地区：[1]Henan Institute of Science and Technology [2]School of Physics & Astronomy, University of Southampton

出　　处：《Chinese Physics C》2019年第1期9-15,共7页中国物理C（英文版）

基　　金：Supported by the Foundation of Henan Institute of Science and Technology(2016ZD01);the China Scholarship Council(201708410324);supported in part by the NExT Institute and the STFC CG(ST/L000296/1)

摘　　要：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 Te V CERN collider.We focus on signals of the tH associated production followed by the decay modes t→b?^+ν_?and H→W W~*,and ■ production followed by the decay modes t→b?^+ν_?and■where?=e,μ.Based on two types of H→W W~*decay topologies,one assuming the semileptonic decay mode H→W W~*→?^+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 to7.1×10^(-4)(1.39×10^(-3))for the 3L channel at 3σsensitivity.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 Te V CERN collider.We focus on signals of the tH associated production followed by the decay modes t→b?^+ν_?and H→W W~*,and ■production followed by the decay modes t→b?^+ν_?and■where?=e,μ.Based on two types of H→W W~*decay topologies,one assuming the semileptonic decay mode H→W W~*→?^+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 to7.1×10^(-4)(1.39×10^(-3))for the 3L channel at 3σsensitivity.

关 键 词：ANOMALOUS TOP-HIGGS COUPLINGS FLAVOR changing neutral CURRENTS LHC 

分 类 号：O572.2[理学—粒子物理与原子核物理]