Warm dark matter in low scale left-right theory

被引:101
|
作者
Nemevsek, Miha [1 ,2 ]
Senjanovic, Goran [1 ]
Zhang, Yue [1 ]
机构
[1] Abdus Salaam Int Ctr Theoret Phys, I-34014 Trieste, Italy
[2] Jozef Stefan Inst, Ljubljana 1001, Slovenia
来源
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2012年 / 07期
关键词
dark matter theory; particle physics - cosmology connection; cosmology of theories beyond the SM; DOUBLE-BETA DECAY; STERILE NEUTRINOS; MAJORANA NEUTRINOS; POWER SPECTRUM; MASS; SEARCH; PARITY; OSCILLATIONS; COLLISIONS; VIOLATION;
D O I
10.1088/1475-7516/2012/07/006
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We investigate the viability of having dark matter in the minimal left-right symmetric theory. We find the lightest right-handed neutrino with a mass around keV as the only viable candidate consistent with a TeV scale of left-right symmetry. In order to account for the correct relic density with such low scales, the thermal overproduction of the dark matter in the early universe is compensated by a sufficient late entropy production due to late decay of heavier right-handed neutrinos. We point out that the presence of the right-handed charge-current interactions, operative around the QCD phase transition, has a crucial impact on the amount of dilution, as does the nature of the phase transition itself. A careful numerical study, employing the Boltzmann equations, reveals the existence of a narrow window for the right-handed gauge boson mass, possibly within the reach of LHC (in disagreement with a previous study). We also elaborate on a variety of astrophysical, cosmological and low energy constraints on this scenario.
引用
收藏
页数:32
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