Limits on non-minimal Lorentz violating parameters through FCNC and LFV processes

TL;DR

This paper investigates how non-minimal Lorentz-violating extensions of the electroweak theory affect flavor-changing neutral currents and lepton flavor violation, establishing strong bounds on these parameters.

Contribution

It provides the first detailed analysis of Lorentz-violating effects on FCNC and LFV processes within a non-minimal electroweak framework, deriving new experimental bounds.

Findings

Strong bounds on Lorentz-violating parameters in quark sector

Constraints on leptonic flavor violation due to Lorentz violation

Analysis links CKM rotation to Lorentz-violating contributions

Abstract

In this work we analyse a non-minimal Lorentz-violating extension of the electroweak theory in the fermionic sector. Firstly we analyse the relation between the CKM rotation in the quark sector and possible contributions of this new coupling to flavour changing neutral currents (FCNC) processes. In sequel we look for non-diagonal terms through possible leptonic flavour violation (LFV) decays. Strong bounds are presented to the Lorentz violating parameters of both the quark and the leptonic sectors.