Warm dark matter in low scale left-right theory

被引：107

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

页数：32

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