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

【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 ■ 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 2σ exclusion capabilities and 5σ discovery reaches,respectively,on the mass of the VLQ-X mX as well as the relevant parameters(Br(X→tW) for mX <1500 GeV and the coupling strength g~* for mX≥1500 GeV) for some typical luminosities at the 3 TeV CLIC.更多还原

【Abstract】 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 ■ 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 2σ exclusion capabilities and 5σ discovery reaches,respectively,on the mass of the VLQ-X mX as well as the relevant parameters(Br(X→tW) for mX <1500 GeV and the coupling strength g~* for mX≥1500 GeV) for some typical luminosities at the 3 TeV CLIC.更多还原