BSM physics at the LHeC and the FCC-he

TL;DR

This paper reviews the potential of electron-proton colliders like LHeC and FCC-he for exploring Beyond the Standard Model physics, highlighting their unique capabilities despite lower energies compared to proton-proton colliders.

Contribution

It provides a comprehensive overview of BSM physics prospects at LHeC and FCC-he, summarizing recent studies and emphasizing their role in complementing other collider experiments.

Findings

LHeC and FCC-he can probe various BSM scenarios effectively.

These colliders offer unique insights into electroweak and leptoquark physics.

Synergies between BSM and $e^-p$ communities are enhanced.

Abstract

Electron-proton ($e^-p$) colliders are an ideal laboratory to study common features of electron and quarks with production via electroweak bosons, leptoquarks, multi-jet final states and very forward physics, due to their impressive pseudorapidity coverage. In addition to these physics cases, there exist a broad Beyond the Standard Model (BSM) program aimed at exploring the capabilities of the LHeC [1] and FCC-he [2] for several New Physics scenarios. Although their centre-of-mass energy is down with respect to a $pp$ collider by a factor of $\sqrt{E_p/E_e} \sim 10~(30)$ for the LHeC (FCC-he), they can be an invaluable tool to characterize BSM physics hints at $ee$ and $pp$ machines. The aim of this talk is to provide, on behalf of the BSM $e^-p$ Working Group, an overview of the aforementioned BSM program, by briefly summarizing the existing studies and reporting on the most recent progress. We expect that the ample scope in terms of NP models to be tested would enhance the synergies between the BSM and $e^-p$ communities