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Title: Nonthermal leptogenesis via direct inflaton decay without SU(2){sub L} triplets

Abstract

We present a nonthermal leptogenesis scenario following standard supersymmetric hybrid inflation, in the case where light neutrinos acquire mass via the usual seesaw mechanism and inflaton decay to heavy right-handed neutrino superfields is kinematically disallowed, or the right-handed neutrinos which can be decay products of the inflaton are unable to generate sufficient baryon asymmetry via their subsequent decay. The primordial lepton asymmetry is generated through the decay of the inflaton into light particles by the interference of one-loop diagrams with exchange of different right-handed neutrinos. The mechanism requires superpotential couplings explicitly violating a U(1) R-symmetry and R-parity. We take into account the constraints from neutrino masses and mixing and the preservation of the primordial asymmetry. We consider two models, one without and one with SU(2){sub R} gauge symmetry. We show that the former is viable, whereas the latter is ruled out. Although the broken R-parity need not have currently observable low-energy signatures, some R-parity-violating slepton decays may be detectable in the future colliders.

Authors:
; ;  [1]
  1. Physics Division, School of Technology, Aristotle University of Thessaloniki, Thessaloniki 54124 (Greece)
Publication Date:
OSTI Identifier:
20711302
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 72; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevD.72.043502; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; BARYONS; COSMOLOGY; FEYNMAN DIAGRAM; GAUGE INVARIANCE; INTERFERENCE; NEUTRINO OSCILLATION; NEUTRINOS; PARITY; PARTICLE DECAY; PARTICLE PRODUCTION; POTENTIALS; REST MASS; SPARTICLES; SU-2 GROUPS; SUPERSYMMETRY; SYMMETRY BREAKING; TRIPLETS; U-1 GROUPS; UNITARY SYMMETRY

Citation Formats

Dent, Thomas, Lazarides, George, Ruiz de Austri, Roberto, and Departamento de Fisica Teorica C-XI and Instituto de Fisica Teorica C-XVI, Universidad Autonoma de Madrid, Cantoblanco, Madrid 28049. Nonthermal leptogenesis via direct inflaton decay without SU(2){sub L} triplets. United States: N. p., 2005. Web. doi:10.1103/PhysRevD.72.043502.
Dent, Thomas, Lazarides, George, Ruiz de Austri, Roberto, & Departamento de Fisica Teorica C-XI and Instituto de Fisica Teorica C-XVI, Universidad Autonoma de Madrid, Cantoblanco, Madrid 28049. Nonthermal leptogenesis via direct inflaton decay without SU(2){sub L} triplets. United States. https://doi.org/10.1103/PhysRevD.72.043502
Dent, Thomas, Lazarides, George, Ruiz de Austri, Roberto, and Departamento de Fisica Teorica C-XI and Instituto de Fisica Teorica C-XVI, Universidad Autonoma de Madrid, Cantoblanco, Madrid 28049. 2005. "Nonthermal leptogenesis via direct inflaton decay without SU(2){sub L} triplets". United States. https://doi.org/10.1103/PhysRevD.72.043502.
@article{osti_20711302,
title = {Nonthermal leptogenesis via direct inflaton decay without SU(2){sub L} triplets},
author = {Dent, Thomas and Lazarides, George and Ruiz de Austri, Roberto and Departamento de Fisica Teorica C-XI and Instituto de Fisica Teorica C-XVI, Universidad Autonoma de Madrid, Cantoblanco, Madrid 28049},
abstractNote = {We present a nonthermal leptogenesis scenario following standard supersymmetric hybrid inflation, in the case where light neutrinos acquire mass via the usual seesaw mechanism and inflaton decay to heavy right-handed neutrino superfields is kinematically disallowed, or the right-handed neutrinos which can be decay products of the inflaton are unable to generate sufficient baryon asymmetry via their subsequent decay. The primordial lepton asymmetry is generated through the decay of the inflaton into light particles by the interference of one-loop diagrams with exchange of different right-handed neutrinos. The mechanism requires superpotential couplings explicitly violating a U(1) R-symmetry and R-parity. We take into account the constraints from neutrino masses and mixing and the preservation of the primordial asymmetry. We consider two models, one without and one with SU(2){sub R} gauge symmetry. We show that the former is viable, whereas the latter is ruled out. Although the broken R-parity need not have currently observable low-energy signatures, some R-parity-violating slepton decays may be detectable in the future colliders.},
doi = {10.1103/PhysRevD.72.043502},
url = {https://www.osti.gov/biblio/20711302}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 4,
volume = 72,
place = {United States},
year = {2005},
month = {8}
}