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arXiv 2109.14944hep-phhep-ex
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利用三体非弹性散射过程直接探测Sub-GeV暗物质

Direct detection of Sub-GeV Dark Matter via 3-body Inelastic Scattering Process

Wei Chao, Mingjie Jin, Ying-Quan Peng

摘要:

直接探测亚GeV暗物质是一项具有挑战性的工作,因为亚GeV暗物质的弹性散射产生的原子核或电子的反冲能量很难达到探测器的探测阈值。本文提出了一种通过三体非弹性散射过程直接探测亚GeV暗辐射的新方法,即$χ+ χ+ {\rm SM} \to η+ {\rm SM}$,其中$χ$是暗辐射候选,$η$是暗辐射复合态或任意暗辐射.这一过程在一大类DM模型中很常见,而无需假设早期宇宙的特定热历史。来自该过程的典型特征几乎是单能脉冲信号,其中反冲能量来自结合能或消耗的DM粒子。我们表明,可检测DM质量范围可以有效地扩大相比,弹性散射过程。

英文摘要:

Direct detection of Sub-GeV dark matter (DM) is challenging because the recoil energy of the nuclei or electron from the elastic scattering of a sub-GeV DM off the target can hardly reach the detector threshold. In this paper, we present a new direct detection strategy for sub-GeV DM via the three-body inelastic scattering process, $χ+ χ+ {\rm SM} \to η+ {\rm SM}$, where $χ$ is DM candidate and $η$ is either a DM composite state or any dark radiation. This process is common for a large class of DM models without presuming particular thermal history in the early Universe. The typical signature from this process is almost a monoenergetic pulse signal where the recoil energy comes from either the binding energy or the consumed DM particle. We show that detectable DM mass range can be effectively enlarged compared to the elastic scattering process.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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