Dark matter indirect detection signals and the nature of neutrinos in the supersymmetric U(1)B-L extension of the standard model

被引:10
|
作者
Allahverdi, Rouzbeh [1 ]
Campbell, Sheldon S. [2 ,3 ]
Dutta, Bhaskar [4 ]
Gao, Yu [4 ]
机构
[1] Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA
[2] Ohio State Univ, Ctr Cosmol & AstroParticle Phys, Columbus, OH 43210 USA
[3] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA
[4] Texas A&M Univ, Dept Phys & Astron, Mitchell Inst Fundamental Phys & Astron, College Stn, TX 77843 USA
来源
PHYSICAL REVIEW D | 2014年 / 90卷 / 07期
基金
美国国家科学基金会;
关键词
CONSTRAINTS; CANDIDATES; VIRGO; MASS;
D O I
10.1103/PhysRevD.90.073002
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
In this paper, we study the prospects for determining the nature of neutrinos in the context of a supersymmetric B - L extension of the standard model by using dark matter indirect detection signals and bounds on N-eff from the cosmic microwave background data. The model contains two new dark matter candidates whose dominant annihilation channels produce more neutrinos than neutralino dark matter in the minimal supersymmetric standard model. The photon and neutrino counts may then be used to discriminate between the two models. If the dark matter comes from the B - L sector, its indirect signals and impact on the cosmic microwave background can shed light on the nature of the neutrinos. When the light neutrinos are of Majorana type, the indirect neutrino signal from the Sun and the Galactic center may show a prompt neutrino box feature, as well as an earlier cutoff in both neutrino and gamma-ray energy spectra. When the light neutrinos are of Dirac type, their contribution to the effective number of neutrinos Neff is at a detectable level.
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页数:11
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