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Title: The role of CP violating scatterings in baryogenesis—case study of the neutron portal

Many baryogenesis scenarios invoke the charge parity (CP) violating out-of-equilibrium decay of a heavy particle in order to explain the baryon asymmetry. Such scenarios will in general also allow CP violating scatterings. We study the effect of these CP violating scatterings on the final asymmetry in a neutron portal scenario. We solve the Boltzmann equations governing the evolution of the baryon number numerically and show that the CP violating scatterings play a dominant role in a significant portion of the parameter space.
Authors:
; ; ;  [1] ;  [2]
  1. ARC Centre of Excellence for Particle Physics at the Terascale, School of Physics, The University of Melbourne, Victoria 3010 (Australia)
  2. Nikhef, Science Park 105, 1098 XG Amsterdam (Netherlands)
Publication Date:
OSTI Identifier:
22375730
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 11; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASYMMETRY; BARYON NUMBER; BOLTZMANN EQUATION; CP INVARIANCE; DECAY; EVOLUTION; NEUTRONS; PARITY; SCATTERING; SPACE