Leptogenesis and a Jarlskog Invariant

2003/12/10 by Sacha Davidson, Ryuichiro Kitano · 1 citation
Physics and Astronomy · #Neutrino Physics Research #Noncommutative and Quantum Gravity Theories #Particle physics theoretical and experimental studies #hep-ph

paper · pdf · doi:10.1088/1126-6708/2004/03/020

published as JHEP 0403 (2004) 020 · 16 pages(spacing reduced a bit), 2 figures; minor editorial changes, a reference added

arxiv created 2003/12/10 · openalex publication_date 2004/03/05 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01

Abstract

The relation between low energy CP violating phases, and the CP asymmetry of leptogenesis, ε, is investigated. Although it is known that in general those are independent, there may be a relation when a model is specified. We construct a Jarlskog invariant which is proportional to ε if the right-handed neutrino masses are hierarchical. Since the invariant can be expressed in terms of left-handed neutrino parameters--some measurable, and some not--it is useful in identifying the limits in which ε is related to MNS phases.

Citations

• No-go for detecting CP violation via neutrinoless double beta decay
• Probing the seesaw mechanism with neutrino data and leptogenesis
• Leptogenesis withoutCPviolation at low energies
• Supersymmetric seesaw mechanism without singlet neutrinos: Neutrino masses and lepton-flavor violation

Cited by

• Low scale seesaw, electron electric dipole moment, and leptogenesis in a model with spontaneousCPviolation