2013/10/31 by G. Lambiase, S. Mohanty, A. R. Prasanna · 1 citation
Physics and Astronomy · #astro-ph.CO #gr-qc #hep-ph
paper · pdf · doi:10.1142/s0218271813300309
62 pages, no figures. Invited review to appear in IJMPD
arxiv created 2013/10/31 · arxiv updated 2015/06/17
In this work we review the theories of origin of matter-antimatter asymmetry in the Universe. The general conditions for achieving baryogenesis and leptogenesis in a CPT conserving field theory have been laid down by Sakharov. In this review we discuss scenarios where a background scalar or gravitational field spontaneously breaks the CPT symmetry and splits the energy levels between particles and anti-particles. Baryon or Lepton number violating processes in proceeding at thermal equilibrium in such backgrounds gives rise to Baryon or Lepton number asymmetry.