论文标题
NLO的共鸣$ S $ -CHANNEL暗物质歼灭
Resonant $s$-channel dark matter annihilation at NLO
论文作者
论文摘要
通过$ S $通道共振的暗物质歼灭的研究通常基于诸如狭窄宽度近似或实际中间状态减法等食谱。我们回顾了一种无配方的形式主义，该形式主义可以在整个理论中在NLO层面实施，并确保取消大众奇点。它的基本成分可以在相对论制度中提出，但是我们表明，如果我们转到非偏见的方法并假设存在动力学平衡，则该过程可以简化。用$ m _ {\ rm s}^{} \ simeq 60 $ gev说明了后一种情况，用于标量单元暗物质，冻结在$ t \ simeq（1-3）$ gev上，重新填充这种情况的可行性，使couplings tiny tiny tiny tiny tiny tiny tiny tiny tiny tiny tiny tiny tiny tiny evade实验性约束。
Studies of dark matter annihilation through an $s$-channel resonance are often based on recipes such as a narrow width approximation or real intermediate state subtraction. We review a recipe-free formalism that can be implemented at the NLO level in the full theory, and ensures the cancellation of mass singularities. Its basic ingredients can be formulated in the relativistic regime, but we show that the procedure simplifies if we go to the non-relativistic one and assume the presence of kinetic equilibrium. The latter case is illustrated for scalar singlet dark matter with $m_{\rm S}^{ } \simeq 60$ GeV, freezing out at $T \simeq (1-3)$ GeV, re-confirming the viability of this scenario with couplings tiny enough to evade experimental constraints.
