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Title: PQ-symmetry for a small Dirac neutrino mass, dark radiation and cosmic neutrinos

Abstract

We propose a supersymmetric scenario in which the small Yukawa couplings for the Dirac neutrino mass term are generated by the spontaneous-breaking of Pecci-Quinn symmetry. In this scenario, a right amount of dark matter relic density can be obtained by either right-handed sneutrino or axino LSP, and a sizable amount of axion dark radiation can be obtained. Interestingly, the decay of right-handed sneutrino NLSP to axino LSP is delayed to around the present epoch, and can leave an observable cosmological background of neutrinos at the energy scale of O(10−100) GeV.

Authors:
 [1]
  1. School of Physics, KIAS, Seoul 130-722 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22373497
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 06; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMIC NEUTRINOS; DENSITY; GEV RANGE 100-1000; MASS; NONLUMINOUS MATTER; PARTICLE DECAY; SUPERSYMMETRY

Citation Formats

Park, Wan-Il, E-mail: wipark@kias.re.kr. PQ-symmetry for a small Dirac neutrino mass, dark radiation and cosmic neutrinos. United States: N. p., 2014. Web. doi:10.1088/1475-7516/2014/06/049.
Park, Wan-Il, E-mail: wipark@kias.re.kr. PQ-symmetry for a small Dirac neutrino mass, dark radiation and cosmic neutrinos. United States. doi:10.1088/1475-7516/2014/06/049.
Park, Wan-Il, E-mail: wipark@kias.re.kr. Sun . "PQ-symmetry for a small Dirac neutrino mass, dark radiation and cosmic neutrinos". United States. doi:10.1088/1475-7516/2014/06/049.
@article{osti_22373497,
title = {PQ-symmetry for a small Dirac neutrino mass, dark radiation and cosmic neutrinos},
author = {Park, Wan-Il, E-mail: wipark@kias.re.kr},
abstractNote = {We propose a supersymmetric scenario in which the small Yukawa couplings for the Dirac neutrino mass term are generated by the spontaneous-breaking of Pecci-Quinn symmetry. In this scenario, a right amount of dark matter relic density can be obtained by either right-handed sneutrino or axino LSP, and a sizable amount of axion dark radiation can be obtained. Interestingly, the decay of right-handed sneutrino NLSP to axino LSP is delayed to around the present epoch, and can leave an observable cosmological background of neutrinos at the energy scale of O(10−100) GeV.},
doi = {10.1088/1475-7516/2014/06/049},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 06,
volume = 2014,
place = {United States},
year = {Sun Jun 01 00:00:00 EDT 2014},
month = {Sun Jun 01 00:00:00 EDT 2014}
}