陪集宇宙学
Coset Cosmology
摘要：
我们表明，Nambu-Goldstone玻色子的潜力，可以有两个或两个以上的本地最小值，例如在对极位置的真空歧管。这发生在许多复合希格斯粒子和复合暗物质的模型中。三角势导致不寻常的功能，如在高温下的对称性不恢复。在某些模型中，例如在基本表象中含有费米子的最小$\rm SO(5)/SO(4)$复合希格斯粒子，这两个最小值是退化的，给出了宇宙学的畴壁问题。否则，一种不寻常的宇宙学就会出现，它可能导致超大质量的原始黑洞;真空或热衰变;破裂的$\mathrm{SU}(2)_L$的高温阶段，这可能对重子生成很有意义。
英文摘要：
We show that the potential of Nambu-Goldstone bosons can have two or more local minima e.g. at antipodal positions in the vacuum manifold. This happens in many models of composite Higgs and of composite Dark Matter. Trigonometric potentials lead to unusual features, such as symmetry non-restoration at high temperature. In some models, such as the minimal $\rm SO(5)/SO(4)$ composite Higgs with fermions in the fundamental representation, the two minima are degenerate giving cosmological domain-wall problems. Otherwise, an unusual cosmology arises, that can lead to supermassive primordial black holes; to vacuum or thermal decays; to a high-temperature phase of broken $\mathrm{SU}(2)_L$, possibly interesting for baryogenesis.
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