2018/11/01 by J. Racker, Racker, J.
Physics and Astronomy · #Asymmetry #Baryogenesis #CP violation #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th) #Leptogenesis #Lepton #Neutrino #Neutrino Physics Research #Nuclear physics #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Physics #Unitarity #Yukawa potential #hep-ph #hep-th
paper · pdf · doi:10.48550/arxiv.1811.00280
published in arXiv (Cornell University) (Cornell University) · 17 pages, 5 figures. V2 has additional explanations and a problem with infrared divergences has been solved (almost matches published version in JHEP)
openalex publication_date 2018/11/01 · arxiv created 2019/02/19 · arxiv updated 2019/02/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
With an emphasis on unitarity and CPT requirements, we study the inclusion of CP-violating processes in baryogenesis at next-to-leading order, particularly those involving the top Yukawa interaction in leptogenesis. We show that there are more contributions than previously considered, but also important cancellations. Some of these involve the interference of connected with disconnected diagrams. We also discuss on the application of the Kinoshita-Lee-Nauenberg theorem to treat the infrared divergences that are common at next-to-leading order. Finally, we calculate the CP asymmetry in the three-body decay of a sterile neutrino into a lepton and top quarks.