# DISCRETE 2018

26-30 November 2018
Europe/Vienna timezone

## Violation of lepton number in 3 units

29 Nov 2018, 14:00
25m
Festsaal

#### Festsaal

Austrian Academy of Sciences, Dr.-Ignaz-Seipel-Platz 2, 1010 Vienna, AUSTRIA
Non-Invited Talk [4] Neutrino masses, mixing and discrete symmetries

### Speaker

Renato Fonseca (IPNP, Charles University, Prague)

### Description

The number of leptons ($L$) may or may not be conserved by the laws of physics. The Standard Model predicts that it is (in perturbative processes), but there is the well known possibility that new physics violates $L$ in 1 or 2 units. The first case ($\Delta L=1$) is associated to proton decay into mesons plus a lepton or anti-lepton; the second case ($\Delta L=2$) is usually associated to Majorana neutrino masses and neutrinoless double beta decay. In this talk, I will discuss the possibility that leptons can only be created or destroyed in units of 3 ($\Delta L=3$). Such a scenario can be probed both by proton decay experiments and by colliders.

Content of the contribution Theory

### Primary author

Renato Fonseca (IPNP, Charles University, Prague)

Paper files: