论文标题
宇宙射线在Sub-Gev暗物质上的弹性和非弹性散射
Elastic and Inelastic Scattering of Cosmic-Rays on Sub-GeV Dark Matter
论文作者
论文摘要
我们在银河系中重新审视了宇宙射线在Sub-Gev暗物质（DM）上碰撞的签名。除了通过广泛讨论的现有DM和中微子实验探测的高散射DM组件外，我们还研究了$γ$ - 砂中的相关信号和中微子中的相关信号，这些信号由于无弹性散射而跨越了广泛的能量范围。假设有一个简单的矢量门户DM模型，我们通过宇宙射线质子来计算散射的DM通量，以及从质子激发，强春岩和随后的Meson衰变中产生的次级$γ$ rays和高能中微子的发射。我们使用$γ$ ray和高能中微子望远镜（包括费米，H.E.S.S.和ICECUBE。将这些限制与在低能DM/中微子检测器Xenon1t/miniboone和IceCube上考虑的向上散射的DM信号进行了比较。对于此特定模型，由于低能能处的大散射横截面，在大多数DM质量范围内，Xenon1T中的向外散射DM事件主要通过未检测到限制。然而，我们的研究表明，传统上认为是DM歼灭和衰减的间接探针的$γ$ ray和中微子信号也可以直接用于约束DM-Nucleon - nucleon与直接搜索实验的互补相互作用。
We revisit the signatures from collisions of cosmic-rays on sub-GeV dark matter (DM) in the Milky Way. In addition to the upscattered DM component that can be probed by existing DM and neutrino experiments widely discussed, we examine the associated signals in $γ$-rays and neutrinos that span a wide energy range due to the inelastic scatterings. Assuming a simple vector portal DM model for illustration, we compute both the upscattered DM flux by cosmic-ray protons, and the resulting emission of secondary $γ$-rays and high-energy neutrinos from proton excitation, hadronization, and the subsequent meson decay. We derive limits on coupling constants in the vector portal model using data from the $γ$-ray and high-energy neutrino telescopes including Fermi, H.E.S.S. and IceCube. These limits are compared to those obtained by considering the upscattered DM signals at the low-energy DM/neutrino detectors XENON1T/MiniBooNE and the IceCube. For this particular model, the limits are set predominantly by non-detection of the upscattered DM events in XENON1T, for most of the DM mass range due to the large scattering cross section at low energies. Nevertheless, our study demonstrates that the $γ$-ray and neutrino signals, traditionally considered as indirect probes for DM annihilation and decay, can also be directly used to constrain the DM--nucleon interaction in complementary to the direct search experiments.
