Eur. Phys. J. C (2020) 80: 287
https://doi.org/10.1140/epjc/s10052-020-7848-3

Regular Article - Theoretical Physics

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

Centro Brasileiro de Pesquisas Físicas (CBPF), Rua Dr Xavier Sigaud 150, Urca, Rio de Janeiro, CEP 22290-180, Brazil

^* e-mail: ymuller@cbpf.br

Received: 15 November 2019
Accepted: 16 March 2020
Published online: 30 March 2020

Abstract

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