Excited electron production at the SPPC-based ep colliders via contact interactions

TL;DR

This paper explores the potential to produce and detect excited electrons at future SPPC-based electron-proton colliders through contact interactions, analyzing their signatures and setting mass and compositeness scale limits.

Contribution

It introduces a detailed analysis of excited electron production at SPPC-based ep colliders, including signal detection strategies and limits on mass and compositeness scale.

Findings

Discovery, observation, and exclusion mass limits for excited electrons.

Kinematical cuts optimized for signal enhancement.

Estimated maximum compositeness scale for detection.

Abstract

If a linear electron accelerator is installed into the SPPC (Super Proton-Proton Collider) complex, ep collision options will be available in addition to pp collisions. We consider the production of excited electrons with spin-1/2 at the future SPPC-based electron-proton colliders with center-of-mass energies of $8.44$, $11.66$, $26.68$ and $36.88$ TeV. In the $ep\rightarrow e^{\star}X\rightarrow e\gamma X$ signal process, excited electrons are produced by contact interactions and decay into the photon channel by gauge interactions. Taking into account the corresponding background process, the pseudorapidity and transverse momentum distributions of the final state particles are plotted. We reported the discovery, observation and exclusion mass limits of excited electrons by applying appropriate kinematical cuts best suited for amplify the signal of the excited electron signature. We also investigated the highest achievable values of the compositeness scale for the discovery of excited electrons at these colliders.