Single production of the excited electrons in the future FCC-based lepton-hadron colliders

Abstract

We study the composite electron production at the FCC-based three electron-proton colliders with the center-of-mass energies of 3.46, 10 and 31.6 TeV. For the signal process of ep -> e* X -> e gamma X, the production cross-sections and decay widths of the excited electrons have been calculated. The differences of some kinematical quantities of the final state particles between the signal and background have been analyzed. For this purpose, transverse momentum and pseudorapidity distributions of electron and photon have been obtained and the kinematical cuts for discovery of the excited electrons have been assigned. We have finally determined the mass limits of excited electrons for observation and discovery by applying these cuts. It is shown that the mass limit for discovery obtained from the collider with root s = 31.6 TeV (called PWFA-LC circle times FCC) is 22.3 TeV for the integrated luminosity L-int = 10 fb(-1).