Search for an exotic vectorlike X-quark in same-sign dilepton final states at the future 3 TeV CLIC  

作　　者：张艳菊 常金龙 刘太刚 Yan-Ju Zhang;Jin-Long Chang;Tai-Gang Liu(School of Medical Engineering,Xinxiang Medical University,Xinxiang 453003,China)

机构地区：[1]School of Medical Engineering,Xinxiang Medical University,Xinxiang 453003,China

出　　处：《Chinese Physics C》2024年第7期67-74,共8页中国物理C（英文版）

基　　金：Supported by the Science and Technology Plan Projects of Henan Province,China(222102310483)。

摘　　要：Vectorlike quarks(VLQs)with masses at the TeV-scale have been predicted in many new physics scenarios beyond the Standard Model(SM).Based on a simplified(X,T)doublet model including the exotic vectorlike X quark(VLQ-X)with an electric charge 5/3,we study the production of the VLQ-X decaying into tW at the future Compact Linear Collider(CLIC)with √s=3 TeV including the initial state radiation and beamstrahlung effects.We focus on the final signals,including same-sign dileptons(electrons or muons),at least one b-tagged jet,and large missing transverse momentum.By performing detailed signal-to-background analyses and detector simulations,we obtain the 2σexclusion capabilities and discovery reaches,respectively,on the mass of the VLQ-Xmx as well as the relevant parameters(Br(X→_(t)W))for mx≥1500GeV and the coupling strength g^(*) for mx≥1500 GeV)for some typical luminosities at the 3 TeV CLIC.

关 键 词：Vectorlike quarks CLIC same-sign dilepton 

分 类 号：O572.33[理学—粒子物理与原子核物理]