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Title: MeV right-handed neutrinos and dark matter

Abstract

We consider the possibility of having an MeV right-handed neutrino as a dark matter constituent. The initial reason for this study was the 511 keV spectral line observed by the satellite experiment INTEGRAL: could it be due to an interaction between dark matter and baryons? Independently of this, we find a number of constraints on the assumed right-handed interactions. They arise, in particular, from the measurements by solar neutrino experiments. We come to the conclusion that such particle interactions are possible, and could reproduce the peculiar angular distribution, but not the rate of the INTEGRAL signal. However, we stress that solar neutrino experiments are susceptible to provide further constraints in the future.

Authors:
; ; ; ; ;  [1]
  1. Service de Physique Theorique, Universite Libre de Bruxelles, B-1050 Brussels (Belgium)
Publication Date:
OSTI Identifier:
21020429
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 8; Other Information: DOI: 10.1103/PhysRevD.75.085017; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANGULAR DISTRIBUTION; BARYONS; KEV RANGE; MEV RANGE; NONLUMINOUS MATTER; PARTICLE INTERACTIONS; SOLAR NEUTRINOS; STRESSES

Citation Formats

Frere, J.-M., Ling, F.-S., Honorez, L. Lopez, Nezri, E., Swillens, Q., and Vertongen, G.. MeV right-handed neutrinos and dark matter. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.085017.
Frere, J.-M., Ling, F.-S., Honorez, L. Lopez, Nezri, E., Swillens, Q., & Vertongen, G.. MeV right-handed neutrinos and dark matter. United States. doi:10.1103/PHYSREVD.75.085017.
Frere, J.-M., Ling, F.-S., Honorez, L. Lopez, Nezri, E., Swillens, Q., and Vertongen, G.. Sun . "MeV right-handed neutrinos and dark matter". United States. doi:10.1103/PHYSREVD.75.085017.
@article{osti_21020429,
title = {MeV right-handed neutrinos and dark matter},
author = {Frere, J.-M. and Ling, F.-S. and Honorez, L. Lopez and Nezri, E. and Swillens, Q. and Vertongen, G.},
abstractNote = {We consider the possibility of having an MeV right-handed neutrino as a dark matter constituent. The initial reason for this study was the 511 keV spectral line observed by the satellite experiment INTEGRAL: could it be due to an interaction between dark matter and baryons? Independently of this, we find a number of constraints on the assumed right-handed interactions. They arise, in particular, from the measurements by solar neutrino experiments. We come to the conclusion that such particle interactions are possible, and could reproduce the peculiar angular distribution, but not the rate of the INTEGRAL signal. However, we stress that solar neutrino experiments are susceptible to provide further constraints in the future.},
doi = {10.1103/PHYSREVD.75.085017},
journal = {Physical Review. D, Particles Fields},
number = 8,
volume = 75,
place = {United States},
year = {Sun Apr 15 00:00:00 EDT 2007},
month = {Sun Apr 15 00:00:00 EDT 2007}
}
  • In a left-right framework, we study the possibility of a light right-handed neutrino dark matter candidate. The most stringent constraints come from neutrino experiments on solar neutrino fluxes, suppressing the magnitude of the right-handed interactions. Despite this constraint we calculate the relic density avoiding over abundance thanks to a very low rehating temperature scenario. The possibility of explaining the Integral 511 keV line is also studied through a dark matter - baryon interaction. If the morphology seems to fit well the shape of the signale absolute flux is much too low compared to the experiment measurement.
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  • Relic abundance of dark matter is investigated in the framework of universal extra dimension models with right-handed neutrinos. These models are free from the serious Kaluza-Klein (KK) graviton problem that the original universal extra dimension model possesses. The first KK particle of the right-handed neutrino is a candidate for dark matter in this framework. When ordinary neutrino masses are large enough such as the degenerate mass spectrum case, the dark matter relic abundance can change significantly. The scale of the extra dimension consistent with cosmological observations can be 500 GeV in the minimal setup of universal extra dimension models withmore » right-handed neutrinos.« less
  • We perform a systematic study of the effects of the type-I seesaw mechanism on the dark matter abundance in the constrained minimal supersymmetric standard model (CMSSM) which includes three right-handed neutrinos (the {nu}CMSSM). For large values of m{sub 0}, m{sub 1/2}, we exploit the effects of large neutrino Yukawa couplings on the renormalization group evolution of the up-type Higgs. In particular, we show that the focus point scale can greatly exceed the electroweak scale resulting in the absence of a focus point region for which the relic density of neutralinos is within the range determined by WMAP. We also discussmore » the effects of the right-handed neutrinos on the so-called funnel region, where the relic density is controlled by s-channel annihilations through a heavy Higgs. For small values of m{sub 0}, m{sub 1/2}, we discuss the possibility of sneutrino coannihilation regions with an emphasis on the suppression of the left-handed slepton doublet masses due to the neutrino Yukawa coupling. We consider two types of toy models consistent with either the normal or inverted hierarchy of neutrino masses.« less