Matter-antimatter asymmetry without departure from thermal equilibrium
  We explore the possibility of baryogenesis without departure from thermal equilibrium. A possible scenario is found, though it contains strong constraints on the size of the $CPT$ violation ($CPTV$) effects and on the role of the $B$ (baryon number) nonconserving interactions which are needed for it. 
Jos\'e Manuel Carmona, Jos\'e Luis Cort\'es, Ashok Das, Jorge Gamboa   and Fernando M\'endez