arXiv subjects

Xue-Jia Cheng

Publications and source records attributed to Xue-Jia Cheng.

3 recordsLinked to original sources

arXiv2026

Probing Neutral Triple Gauge Couplings at e- p colliders

The Standard Model Effective Field Theory~(SMEFT) has attracted much attention as a model-independent way for probing new physical signals. In the SMEFT framework, $e^{-}p$ colliders can be used to study new interactions of gauge bosons, such as neutral Triple Gauge Couplings~(nTGCs). We study the signals and backgrounds of six different processes at the Future Circular Collider-hadron electron~(FCC-he) and propose different event selection strategies. The expected constraints on the coefficients of the dimension-8 operators for each process, as well as the combined constraints are obtained. The results show that the sensitivity of $e^{-}p$ colliders to nTGCs is similar to the current Large Hadron Collider~(LHC) experiments and is more competitive than that of Circular Electron Positron Collider~(CEPC) experiments.

hep-ph↗

arXiv2023

Sensitivity of the future $\boldsymbol{e^{-}p}$ collider to the coupling of axion-like particles with vector bosons

Axion-like particles (ALPs) arise naturally in many extensions of the Standard Model (SM). We explore the discovery potential for ALPs of the Large Hadron electron Collider (LHeC) via the $W^{+}W^{-}$ fusion process. For concreteness, both cases of the ALP decaying to muon pairs and $b\overline{b}$ pairs are investigated. Our numerical results show that the LHeC with the center of mass energy of $1.3$ TeV and the integrated luminosity of $1$ ab$^{-1}$ might be more sensitive than the LHC in probing ALPs over a range of masses from a few tens of GeV to $900$ GeV, where the promising sensitivities to the coupling of ALP with $W^{\pm}$ bosons reach nearly $0.15$ TeV$^{-1}$ and $0.32$ TeV$^{-1}$ for the signal processes $e^{-}p\rightarrowν_{e}ja(a\rightarrowμ^{+}μ^{-})$ and $e^{-}p\rightarrowν_{e}ja(a\rightarrow b\overline{b})$, respectively.

hep-ph↗

arXiv2023

Charged-current non-standard neutrino interactions at the LHC and HL-LHC

A series of new physics scenarios predict the existence of the extra charged gauge boson $W'$, which can induce charged-current (CC) non-standard neutrino interactions (NSIs). The theoretical constraints on the simplified $W'$ model and further on the CC NSI parameters $\widetildeε^{ qq'Y}_{αβ}$ from partial wave unitarity and $W'$ decays are considered. The sensitivity of the process $p p \rightarrow W'\rightarrow \ellν$ to the $W'$ model at the LHC and high-luminosity~(HL) LHC experiments is investigated by estimating the expected constraints on $\widetildeε^{qq'Y}_{αβ}$ ($α= β= e $ or $μ$) using a Monte-Carlo~(MC) simulation. We find that the interference effect plays an important role, and the LHC can strongly constrain $\widetildeε^{qq'L}_{αβ}$. Compared with those at the $13 \;{\rm TeV}$ LHC with $\mathcal{L}=139\;{\rm fb}^{-1}$, the expected constraints at the $14 \;{\rm TeV}$ LHC with $\mathcal{L}=3\;{\rm ab}^{-1}$ can be strengthened to approximately one order of magnitude.

hep-ph↗