低尺度左右理论中的暖暗物质
Warm Dark Matter in Low Scale Left-Right Theory
摘要：
我们调查的可行性，有暗物质在最小的左右对称理论。我们发现最轻的右手中微子的质量约keV的唯一可行的候选人符合TeV规模的左右对称性。为了解释如此低尺度的遗迹密度，早期宇宙中暗物质的热过剩产生被较重右手中微子晚期衰变产生的足够晚期熵产生所补偿。我们指出，右手电荷电流相互作用的存在下，操作周围的QCD相变，有一个至关重要的影响量的稀释，相变本身的性质。仔细的数值研究，采用玻尔兹曼方程，揭示了右手规范玻色子质量的窄窗口的存在，可能在大型强子对撞机的范围内（与以前的研究不一致）。我们还详细阐述了各种天体物理学，宇宙学和低能量的限制，这种情况下。
英文摘要：
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.
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