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Title: Three-flavored nonresonant leptogenesis at intermediate scales

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 Univ., Durham (United Kingdom)
  2. SISSA/INFN, Trieste (Italy); Univ. of Tokyo, Kashiwa (Japan)
  3. Univ. of Cincinnati, Cincinnati, OH (United States)
  4. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Publication Date:
Report Number(s):
arXiv:1804.05066; IPPP-18-25; FERMILAB-PUB-18-100-T; IPMU18-0062; SISSA-17-2018-FISI
Journal ID: ISSN 2470-0010; PRVDAQ; 1667870
Grant/Contract Number:
AC02-07CH11359
Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 98; Journal Issue: 1; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1461914
Alternate Identifier(s):
OSTI ID: 1436701

Moffat, Kristian, Pascoli, Silvia, Petcov, S. T., Schulz, H., and Turner, J.. Three-flavored nonresonant leptogenesis at intermediate scales. United States: N. p., Web. doi:10.1103/PhysRevD.98.015036.
Moffat, Kristian, Pascoli, Silvia, Petcov, S. T., Schulz, H., & Turner, J.. Three-flavored nonresonant leptogenesis at intermediate scales. United States. doi:10.1103/PhysRevD.98.015036.
Moffat, Kristian, Pascoli, Silvia, Petcov, S. T., Schulz, H., and Turner, J.. 2018. "Three-flavored nonresonant leptogenesis at intermediate scales". United States. doi:10.1103/PhysRevD.98.015036.
@article{osti_1461914,
title = {Three-flavored nonresonant leptogenesis at intermediate scales},
author = {Moffat, Kristian and Pascoli, Silvia 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 = {10.1103/PhysRevD.98.015036},
journal = {Physical Review D},
number = 1,
volume = 98,
place = {United States},
year = {2018},
month = {7}
}