Spontaneous Baryogenesis from effective U(1) symmetries in beyond standard model extensions

• Grant number: 24/17752-0
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: April 01, 2025
• End date: September 30, 2028
• Field of knowledge: Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields
• Principal Investigator: Chee Sheng Fong
• Grantee: Sergio Manuel Cubides Pérez
• Host Institution: Centro de Ciências Naturais e Humanas (CCNH). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil
• Associated research grant: 19/11197-6 - Precision test of baryogenesis, AP.JP

Abstract

We propose a novel approach to explain the baryon asymmetry of the Universe based on spontaneous baryogenesis. Our research focuses on investigating extensions to the Standard Model that break spontaneously some effective $U(1)_x$symmetries together higher dimensional operators that break the baryon minus lepton $(B-L)$ symmetry. The resulting Pseudo-Nambu-Goldstone bosons (PNGBs) induce CPT violation through the derivative coupling to the associated current, allowing for baryon asymmetry generation through in-equilibrium (B-L)-violating interactions. We will explore the potential consequences of these interactions on the dark matter production and associated phenomena like proton decay, neutrinoless double beta decay and neutron-antineutron oscillation which both violate B-L.