1998/09/30 by Utpal Sarkar, Rishikesh Vaidya, R. Vaidya · 1 citation
Physics and Astronomy · #Asymmetry #Baryon asymmetry #Hamiltonian (control theory) #Leptogenesis #Lepton #Lepton number #Mass matrix #Neutrino #Neutrino Physics Research #Noncommutative and Quantum Gravity Theories #Particle physics theoretical and experimental studies #Physics beyond the Standard Model #hep-ph
paper · pdf · doi:10.1016/s0370-2693(98)01286-6
published as Phys.Lett. B442 (1998) 243-248 · 9 pages latex file, minor changes
arxiv created 1998/10/15 · openalex publication_date 1998/12/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We discuss the question of CP-violation in the effective Hamiltonian approach in models of leptogenesis through heavy right handed neutrino decays. We first formulate the problem in four component notation and then point out that before the heavy neutrinos have decayed away, the universe becomes CP-asymmetric in the heavy neutrinos. However, the lepton asymmetry generated after they completely decay are independent of this asymmetry.