论文标题
通过重中微子门户探测冻结暗物质
Probing Freeze-in Dark Matter via Heavy Neutrino Portal
论文作者
论文摘要
我们探讨了使用RHN搜索实验探测通过右中微子（RHN）门户生成的冻结暗物质（DM）的可能性。我们专注于最小扩展的类型I SEESAW模型的简化框架，该框架仅由四个自由参数组成，即RHN质量，费米子DM质量，DM和RHN之间的Yukawa耦合以及一个真实的单元标量表。我们考虑通过热RHN的衰减或通过RHN介导的浴粒子的散射来考虑DM产生的两种情况。在这两种情况下，我们都表明，对于子TEV量表DM质量，满足观察到的DM遗物密度的允许模型参数空间落在冻结场景的情况下，属于当前和未来的对撞机，光束垃圾场和正向物理设施的范围，寻找虚假耦合的重型中微子。
We explore the possibility of probing freeze-in dark matter (DM) produced via the right-handed neutrino (RHN) portal using the RHN search experiments. We focus on a simplified framework of minimally-extended type-I seesaw model consisting of only four free parameters, namely the RHN mass, the fermionic DM mass, the Yukawa coupling between the DM and the RHN, and a real singlet scalar mass. We consider two cases for the DM production either via decay of the thermal RHN or via scattering of the bath particles mediated by the RHN. In both cases, we show that for sub-TeV scale DM masses, the allowed model parameter space satisfying the observed DM relic density for freeze-in scenario falls within the reach of current and future collider, beam dump and forward physics facilities looking for feebly-coupled heavy neutrinos.
