KK MC 4.22: CEEX EW Corrections for f\bar{f}\rightarrow f'\bar{f'} at LHC and Muon Colliders

TL;DR

This paper enhances the CEEX exponentiation method within the KK MC Monte Carlo to improve precision calculations of fermion pair production processes at the LHC and muon colliders, comparing it to older methods.

Contribution

The paper introduces an upgraded CEEX implementation in KK MC for various fermion processes, improving accuracy for collider physics applications.

Findings

Enhanced CEEX implementation for multiple fermion processes.

Comparison of CEEX and EEX theories highlighting improvements.

Relevance to LHC and muon collider precision physics.

Abstract

We present the upgrade of the coherent exclusive (CEEX) exponentiation realization of the Yennie-Frautschi-Suura (YFS) theory used in our Monte Carlo ({\cal KK} MC) to 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', with an eye toward the precision physics of the LHC and possible high energy muon colliders. We give a brief summary of the CEEX theory in comparison to the older (EEX) exclusive exponentiation theory and illustrate theoretical results relevant to the LHC and possible muon collider physics programs.