https://doi.org/10.1140/epjc/s10052-024-13475-1
Regular Article
Searching for the vector-like X-quark at the future electron–proton colliders
School of Biomedical Engineering, Xinxiang Medical University, 453003, Xinxiang, China
Received:
13
May
2024
Accepted:
9
October
2024
Published online:
19
November
2024
In a simplified model including an exotic vector-like X-quark (VLQ-X) with electric charge 5/3, we investigate the process 
induced by the couplings between the VLQ-X and the first- and third-generation quarks at the future ep colliders. We further explore the prospects of discovering the VLQ-X via the 
decay model at the electron–hadron Future Circular Collider (FCC-eh) with its proposed 60 GeV electron beam and 50 TeV proton beam. We focus our analysis on the final states, including two same-sign lepton (electrons or muons) or 
pairs, at least one b-tagged jet, and large missing transverse momentum. By performing a detailed signal-to-background analysis and detector simulations, the 95% confidence level exclusion limits and 
discovery reaches are presented in terms of parameter space regions.
© The Author(s) 2024
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Funded by SCOAP3.
