论文标题
用深光标量探索宇宙
Exploring the Universe with Dark Light Scalars
论文作者
论文摘要
我们研究由（超）轻标量组成的黑暗扇区的宇宙学。由于标量质量辐射不稳定，因此需要一个特殊的解释才能使质量比紫外线尺度小得多。标量质量的起源有两种众所周知的机制。标量可以识别为伪金石玻色子，其移位对称性被非扰动校正（如轴）明确打破。或者，它可以被识别为像粘合球这样的复合粒子，其质量受到理论的限制量表的限制。在这两种情况下，标量都可以自然光，但是相互作用行为却大不相同。斧子（粘合球）较轻，较弱（较强）相互作用。我们认为隐藏的非亚伯仪对称性对称性对称性的对称性异常折断。在仪表组限制之后，黑轴和深色粘合球会得到质量，并且都形成了多组分的暗物质。我们仔细考虑了从黑胶体到深色轴的能量流的影响，并得出了背景和扰动变量的全部运动方程。还阐明了深色轴向黑胶偶联对熵演变和等异神经扰动的影响。最后，我们讨论了光环形式后粘合球子组成的暗物质的坟墓 - 热塌陷，以探索有助于在高红移处观察到的超质量黑洞的种子形成的潜力。有了简化的假设，胶球子组合物的暗物质质量为$ 0.01-0.1 {\ rm mev} $，以及带有衰减常数$ f_a = {\ cal o}（10^{15^{15} {15} -10^{16} {16} {16}）{ O}（10^{ - 14} -10^{ - 18}）\，{\ rm ev} $，可以在高红移时提供有关超质量黑洞的起源的提示。
We study the cosmology of the dark sector consisting of (ultra) light scalars. Since the scalar mass is radiatively unstable, a special explanation is required to make the mass much smaller than the UV scale. There are two well-known mechanisms for the origin of scalar mass. The scalar can be identified as a pseudo-Goldstone boson, whose shift symmetry is explicitly broken by non-perturbative corrections, like the axion. Alternatively, it can be identified as a composite particle like the glueball, whose mass is limited by the confinement scale of the theory. In both cases, the scalar can be naturally light, but interaction behavior is quite different. The lighter the axion (glueball), the weaker (stronger) it interacts. We consider the dark axion whose shift symmetry is anomalously broken by the hidden non-abelian gauge symmetry. After the confinement of the gauge group, the dark axion and the dark glueball get masses and both form multicomponent dark matter. We carefully consider the effects of energy flow from the dark gluons to the dark axions and derive the full equations of motion for the background and the perturbed variables. The effect of the dark axion-dark gluon coupling on the evolution of the entropy and the isocurvature perturbations is also clarified. Finally, we discuss the gravo-thermal collapse of the glueball subcomponent dark matter after the halos form, in order to explore the potential to contribute to the formation of seeds for the supermassive black holes observed at high redshifts. With the simplified assumptions, the glueball subcomponent dark matter with the mass of $0.01-0.1 {\rm MeV}$, and the axion main dark matter component with the decay constant $f_a={\cal O}(10^{15}-10^{16}){\rm GeV}$, the mass of ${\cal O}(10^{-14}-10^{-18})\,{\rm eV}$, can provide the hint on the origin of the supermassive black holes at high redshifts.
