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Title: Three-Flavoured Non-Resonant Leptogenesis at Intermediate Scales

Abstract

Leptogenesis can successfully explain the matter-antimatter asymmetry via out-of-equilibrium decays of heavy Majorana neutrinos in the early Universe. In this article we focus on non-resonant thermal leptogenesis and we study the possibility of lowering its scale through flavour effects in an exhaustive exploration of the model parameter space. We numerically solve the density matrix equations for one and two decaying heavy Majorana neutrinos and present the level of fine-tuning of the light neutrino masses within these scenarios. We demonstrate that the scale of thermal leptogenesis may be as low as $10^6$ GeV.

Authors:
 [1];  [1];  [2];  [3];  [4]
  1. Durham U., IPPP
  2. Tokyo U., IPMU
  3. Cincinnati U.
  4. Fermilab
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1436701
Report Number(s):
arXiv:1804.05066; IPPP-18-25; FERMILAB-PUB-18-100-T; IPMU18-0062; SISSA-17-2018-FISI
1667870
DOE Contract Number:
AC02-07CH11359
Resource Type:
Journal Article
Resource Relation:
Journal Name: TBD
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Moffat, K., Pascoli, S., Petcov, S. T., Schulz, H., and Turner, J. Three-Flavoured Non-Resonant Leptogenesis at Intermediate Scales. United States: N. p., 2018. Web.
Moffat, K., Pascoli, S., Petcov, S. T., Schulz, H., & Turner, J. Three-Flavoured Non-Resonant Leptogenesis at Intermediate Scales. United States.
Moffat, K., Pascoli, S., Petcov, S. T., Schulz, H., and Turner, J. Fri . "Three-Flavoured Non-Resonant Leptogenesis at Intermediate Scales". United States. doi:. https://www.osti.gov/servlets/purl/1436701.
@article{osti_1436701,
title = {Three-Flavoured Non-Resonant Leptogenesis at Intermediate Scales},
author = {Moffat, K. and Pascoli, S. and Petcov, S. T. and Schulz, H. and Turner, J.},
abstractNote = {Leptogenesis can successfully explain the matter-antimatter asymmetry via out-of-equilibrium decays of heavy Majorana neutrinos in the early Universe. In this article we focus on non-resonant thermal leptogenesis and we study the possibility of lowering its scale through flavour effects in an exhaustive exploration of the model parameter space. We numerically solve the density matrix equations for one and two decaying heavy Majorana neutrinos and present the level of fine-tuning of the light neutrino masses within these scenarios. We demonstrate that the scale of thermal leptogenesis may be as low as $10^6$ GeV.},
doi = {},
journal = {TBD},
number = ,
volume = ,
place = {United States},
year = {Fri Apr 13 00:00:00 EDT 2018},
month = {Fri Apr 13 00:00:00 EDT 2018}
}