Lepton flavor violation processes in nuclei

CIVITARESE, O.; TARUTINA, T.

Praga

Workshop; Workshop on Calculation of Double-Beta-Decay Matrix Elements (MEDEX'19); 2019

Institute of Experimental and Applied Physics, Czech Technical University in Prague (Czech Republic); by the University of La Plata (La Plata, Argentina) and by the University of Jyväskylä (Jyväskylä, Finland)

Lepton-flavor violation (LFV) processes in the presence of nuclei are revisited. The theoretical framework is constructed by considering a general Lagrangian written at quark level. By successive approximations the Lagrangian is converted into an effective one where the quark degrees of freedom are replaced by their nucleonic counterparts. The effective current operators are explicitly separated into spin dependent and spin independent terms. We focus, particularly, in the estimative of non-coherent processes. The case of (µ− → e−) LFV in 208Pb is given as an example about the use of the formalism.