CEEX EW Corrections for f \bar{f}\rightarrow f'\bar{f'} at LHC, Muon Colliders and FCC-ee as Realized in KK MC 4.22

TL;DR

This paper extends the CEEX resummation method within KK MC to accurately simulate far{f} to f'ar{f'} processes, crucial for precision measurements at LHC, FCC-ee, and muon colliders.

Contribution

The paper introduces an extension of the CEEX approach in KK MC to include a wider range of fermion pair processes relevant for collider physics.

Findings

Enhanced theoretical framework for fermion pair processes.

Applicability to LHC, FCC-ee, and muon collider physics.

Improved precision in collider process simulations.

Abstract

With an eye toward the precision physics of the LHC, FCC-ee and possible high energy muon colliders, we present the extension of the CEEX (coherent exclusive exponentiation) realization of the YFS approach to resummation in our KK MC to include the processes f\bar{f}\rightarrow f'\bar{f'}, f=\mu,\tau, q,\nu_\ell, f'=e, \mu,\tau, q, \nu_\ell, q=u,d,s,c,b,t, \ell =e,\mu,\tau with f \ne f'. After giving a brief summary of the CEEX theory with reference to the older EEX (exclusive exponentiation) theory, we illustrate theoretical results relevant to the LHC, FCC-ee, and possible muon collider physics programs.