论文标题
黑暗重子的宇宙学和天体物理探针
Cosmological and astrophysical probes of dark baryons
论文作者
论文摘要
我们检查了“黑暗巴里昂”的宇宙学和天体物理特征，这是一种与中子混合的中性效率。由于混合通过夸克一级的高维操作员，因此在高能下的深色重子的产生会增强，因此早期宇宙中的丰度可能很重要。将其最初的丰度视为一个自由参数，我们得出了深色重子的特性的新的强大限制。原始的核合成和宇宙微波背景提供了强大的限制，这是由于中子通过其诱导的过渡偶极子与深色重子的转化，并且由于深色bary子的后期衰变。此外，中子恒星中的中子可能会缓慢腐烂到黑暗的重子，从而提供了一种新型的热源，该热源受到脉冲星温度测量的限制。考虑到所有约束，我们确定了参数空间，其中深色重子可以成为可行的暗物质候选者，并讨论探测它的有希望的途径。
We examine the cosmological and astrophysical signatures of a "dark baryon," a neutral fermion that mixes with the neutron. As the mixing is through a higher-dimensional operator at the quark level, production of the dark baryon at high energies is enhanced so that its abundance in the early universe may be significant. Treating its initial abundance as a free parameter, we derive new, powerful limits on the properties of the dark baryon. Primordial nucleosynthesis and the cosmic microwave background provide strong constraints due to the inter-conversion of neutrons to dark baryons through their induced transition dipole, and due to late decays of the dark baryon. Additionally, neutrons in a neutron star could decay slowly to dark baryons, providing a novel source of heat that is constrained by measurements of pulsar temperatures. Taking all the constraints into account, we identify parameter space where the dark baryon can be a viable dark matter candidate and discuss promising avenues for probing it.
