Detecting Light Dark Matter via Inelastic Cosmic Ray Collisions.
Detecting Light Dark Matter via Inelastic Cosmic Ray Collisions.
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DOI：
10.1103/physrevlett.123.261802
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发表时间：
2019-05
影响因子：
8.6
通讯作者：
J.B.G. Alvey;M. Campos;M. Fairbairn;T. You
中科院分区：
文献类型：
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作者：
J.B.G. Alvey;M. Campos;M. Fairbairn;T. You
直接探测实验依赖于核反冲签名失去敏感性亚GeV的暗物质的典型星系速度。如果存在另一个动量更高的通量源，这种灵敏度就会恢复。这样一个充满能量的亮暗物质流可能来自于非弹性宇宙射线碰撞中产生的介子衰变。我们计算这种新的生产机制-宇宙束流收集实验-并估计由此产生的限制从XENON 1 T和LZ。我们发现，来自非弹性宇宙线与大气核碰撞的暗物质通量可以支配来自与残余暗物质的弹性碰撞的通量。我们得到的限制hadrophilic标量介质模型的竞争力与那些从MiniBoone光兆电子伏尺度介质群众。
Direct detection experiments relying on nuclear recoil signatures lose sensitivity to sub-GeV dark matter for typical galactic velocities. This sensitivity is recovered if there exists another source of flux with higher momenta. Such an energetic flux of light dark matter could originate from the decay of mesons produced in inelastic cosmic ray collisions. We compute this novel production mechanism-a cosmic beam dump experiment-and estimate the resulting limits from XENON1T and LZ. We find that the dark matter flux from inelastic cosmic rays colliding with atmospheric nuclei can dominate over the flux from elastic collisions with relic dark matter. The limits that we obtain for hadrophilic scalar mediator models are competitive with those from MiniBoone for light MeV-scale mediator masses.