论文标题
来自宇宙射线产生的毫米粒子的新约束
New Constraints on Millicharged Particles from Cosmic-ray Production
论文作者
论文摘要
我们研究了从宇宙射线射线 - 大气碰撞中生产异国情调的毫运动颗粒（MCP），这构成了所有陆地实验的永久MCP生产源，我们对MCP通量的计算可用于重新解释现有的限制，例如在宏观和Majoara诸如宏观和Majoara的实验中的限制。大规模的地下中微子探测器是由此产生的MCP的特别有利目标。使用Super-K实验中的可用数据，我们对MCPS设定了新的限制，这是质量范围$ 0.1 \ LessSIMM_χ\ Lessim 0.5 $ 0.5 $ GEV的最佳敏感性，并且具有基于加速器的群体的竞争力，最高为1.5 GEV。将这些约束应用于暗物质（DM）的子主导成分（DM）的模型，使我们能够探测参数空间的一部分，这些部分对常规的直接检测DM实验具有挑战性，而与对DM丰度的任何假设无关。通过下一代大规模中微子探测器，可以进一步改善这些结果。
We study the production of exotic millicharged particles (MCPs) from cosmic ray-atmosphere collisions which constitutes a permanent MCP production source for all terrestrial experiments Our calculation of the MCP flux can be used to reinterpret existing limits from experiments such as MACRO and Majorana on an ambient flux of ionizing particles. Large-scale underground neutrino detectors are particularly favorable targets for the resulting MCPs. Using available data from the Super-K experiment, we set new limits on MCPs, which are the best in sensitivity reach for the mass range $0.1 \lesssim m_χ \lesssim 0.5$ GeV, and which are competitive with accelerator-based searches for masses up to 1.5 GeV. Applying these constraints to models where a sub-dominant component of dark matter (DM) is fractionally charged allows us to probe parts of the parameter space that are challenging for conventional direct-detection DM experiments, independently of any assumptions about the DM abundance. These results can be further improved with the next generation of large-scale neutrino detectors.
