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Title: Insensitivity of Leptogenesis with Flavor Effects to Low Energy Leptonic CP Violation

Abstract

If the baryon asymmetry of the Universe is produced by leptogenesis, CP violation is required in the lepton sector. In the seesaw extension of the standard model with three hierarchical right-handed neutrinos, we show that the baryon asymmetry is insensitive to the Pontecorvo-Maki-Nagakawa-Sakata phases: thermal leptogenesis can work for any value of the observable phases. This result was well known when there were no flavor effects in leptogenesis; we show that it remains true when flavor effects are included.

Authors:
;  [1]; ;  [2]
  1. IPN de Lyon, Universite Lyon 1, CNRS, 4 rue Enrico Fermi, Villeurbanne, 69622 cedex (France)
  2. Departamento de Fisica Teorica and IFIC, Universidad de Valencia-CSIC, Valencia (Spain)
Publication Date:
OSTI Identifier:
21024311
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 99; Journal Issue: 16; Other Information: DOI: 10.1103/PhysRevLett.99.161801; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; BARYONS; CP INVARIANCE; FLAVOR MODEL; NEUTRINOS; PARTICLE PRODUCTION; STANDARD MODEL; UNIVERSE

Citation Formats

Davidson, Sacha, Palorini, Federica, Garayoa, Julia, and Rius, Nuria. Insensitivity of Leptogenesis with Flavor Effects to Low Energy Leptonic CP Violation. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.99.161801.
Davidson, Sacha, Palorini, Federica, Garayoa, Julia, & Rius, Nuria. Insensitivity of Leptogenesis with Flavor Effects to Low Energy Leptonic CP Violation. United States. doi:10.1103/PHYSREVLETT.99.161801.
Davidson, Sacha, Palorini, Federica, Garayoa, Julia, and Rius, Nuria. Fri . "Insensitivity of Leptogenesis with Flavor Effects to Low Energy Leptonic CP Violation". United States. doi:10.1103/PHYSREVLETT.99.161801.
@article{osti_21024311,
title = {Insensitivity of Leptogenesis with Flavor Effects to Low Energy Leptonic CP Violation},
author = {Davidson, Sacha and Palorini, Federica and Garayoa, Julia and Rius, Nuria},
abstractNote = {If the baryon asymmetry of the Universe is produced by leptogenesis, CP violation is required in the lepton sector. In the seesaw extension of the standard model with three hierarchical right-handed neutrinos, we show that the baryon asymmetry is insensitive to the Pontecorvo-Maki-Nagakawa-Sakata phases: thermal leptogenesis can work for any value of the observable phases. This result was well known when there were no flavor effects in leptogenesis; we show that it remains true when flavor effects are included.},
doi = {10.1103/PHYSREVLETT.99.161801},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 16,
volume = 99,
place = {United States},
year = {2007},
month = {10}
}