论文标题
非热文物的温暖有多温暖？ lyman- $α$在超平衡的暗物质上界限
How warm are non-thermal relics? Lyman-$α$ bounds on out-of-equilibrium dark matter
论文作者
论文摘要
我们研究了以热平衡状态产生的非冷暗物质（NCDM）的功率谱。我们考虑从标量冷凝物（Adflaton，Moduli），热和非热粒子的衰减以及热和非热冻结中的暗物质产生。对于每种情况，我们计算NCDM相空间分布和线性物质功率谱，该频谱具有类似于温暖暗物质（WDM）的截止。该量表仅由NCDM状态方程确定。我们提出了一个映射过程，该过程将转换为NCDM场景的WDM Lyman-$α$质量。此过程不需要非线性物质功率谱的昂贵临时数值计算。通过应用它，我们获得了几种NCDM可能性的界限，范围从$ m _ {\ rm dm} \ gtrsim {\ rm eev} $，用于DM生产的DM生产，从重新加热的温度低，到非电热量冻结的sub-kev值。我们讨论了这些结果对特定示例的现象学含义，包括强稳定和非稳定的超对称模量，加重衰减产生的重力，$ z'$ $ z'$和spin-2介导的冻结以及非苏皮比对称旋转旋转-3/2 dm。
We investigate the power spectrum of Non-Cold Dark Matter (NCDM) produced in a state out of thermal equilibrium. We consider dark matter production from the decay of scalar condensates (inflaton, moduli), the decay of thermalized and non-thermalized particles, and from thermal and non-thermal freeze-in. For each case, we compute the NCDM phase space distribution and the linear matter power spectrum, which features a cutoff analogous to that for Warm Dark Matter (WDM). This scale is solely determined by the equation of state of NCDM. We propose a mapping procedure that translates the WDM Lyman-$α$ mass bound to NCDM scenarios. This procedure does not require expensive ad hoc numerical computations of the non-linear matter power spectrum. By applying it, we obtain bounds on several NCDM possibilities, ranging from $m_{\rm DM}\gtrsim {\rm EeV}$ for DM production from inflaton decay with a low reheating temperature, to sub-keV values for non-thermal freeze-in. We discuss the phenomenological implications of these results for specific examples which include strongly-stabilized and non-stabilized supersymmetric moduli, gravitino production from inflaton decay, $Z'$ and spin-2 mediated freeze-in, and non-supersymmetric spin-3/2 DM.
