Single production of composite electrons at the future SPPC-based lepton-hadron colliders

TL;DR

This paper investigates the potential to produce and detect excited composite electrons at future high-energy SPPC-based electron-proton colliders, analyzing production rates, decay channels, and discovery prospects across various energies.

Contribution

It provides the first detailed analysis of excited electron production and detection strategies at future SPPC-based ep colliders, including cross-section calculations and significance contours.

Findings

Production cross-sections increase with collider energy.

Photon decay channel offers promising detection prospects.

Discovery potential extends to higher mass ranges at increased luminosities.

Abstract

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 $8.4$, $11.6$, $26.6$ and $36.8$ TeV. These exotic particles are predicted in the composite models. We calculate the production cross-sections and concentrate on the photon decay channel of the excited electrons with the process of $ep\rightarrow e^{\star}X\rightarrow e\gamma X$ . The pseudorapidity and transverse momentum distributions of the electrons and photons in the final-state have been plotted in order to determine the kinematical cuts best suited for discovery of the excited electrons. By applying these cuts we compute $2\sigma$, $3\sigma$ and $5\sigma$ contour plots of the statistical significance of the expected signal in the parameter space ($L$, $m^{\star}$), where $L$ denotes the integrated luminosity of the collider and $m^{\star}$ is the mass of the composite electrons.