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arXiv 2004.13966hep-phastro-ph.CO
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强度前沿时代的强相互作用大质量粒子与暗光子

Strongly-interacting massive particle and dark photon in the era of intensity frontier

Ayuki Kamada, Masaki Yamada, Tsutomu T. Yanagida

摘要:

强相互作用大质量粒子(SIMP)是暗物质(DM)的一个有趣的候选者,因为它的自相互作用截面可以自然地强到足以解决小尺度结构形成的天体物理问题。通过假设一个非线性凝聚,提出了一个简单的模型,其中复合SIMP来自“强相互作用”U(1)$_{\rm d}$规范理论.在原始模型中,DM遗迹丰度由$3\to2$湮灭过程通过Wess-Zumino-Witten项确定。在这封信中,我们讨论了DM遗迹丰度也是通过超荷规范玻色子和暗U(1)$_{\rm d}$规范玻色子(暗光子)之间的动力学混合的半湮灭过程自然确定的。在不久的将来,可以通过LDMX式的丢失动量实验发现暗光子。

英文摘要:

A strongly interacting massive particle (SIMP) is an interesting candidate for dark matter (DM) because its self-interaction cross section can be naturally strong enough to address the astrophysical problem of small-scale structure formation. A simple model was proposed by assuming a monopole condensation, where composite SIMP comes from a "strongly interacting" U(1)$_{\rm d}$ gauge theory. In the original model, the DM relic abundance is determined by the $3\to2$ annihilation process via the Wess-Zumino-Witten term. In this letter, we discuss that the DM relic abundance is naturally determined also by a semi-annihilation process via a kinetic mixing between the hypercharge gauge boson and the dark U(1)$_{\rm d}$ gauge boson (dark photon). The dark photon can be discovered by LDMX-style missing momentum experiments in the near future.

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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