arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2304.08686hep-ph
收藏

伴随双瀑布场的暴胀优雅退出与再加热

Graceful exit from inflation and reheating with twin waterfalls

Hyun Min Lee, Adriana Menkara

AI总结:

研究了含赝Nambu-Goldstone玻色子暴胀子与双瀑布标量场的混合暴胀,利用$Z_2$对称性保持势平坦并避免畴壁问题,通过Higgs portal耦合实现高效再加热,并在额外对称性下提出预热可产生正确丰度的瀑布暗物质。

摘要:

我们研究了具有赝 Nambu-Goldstone 玻色子暴胀子和两个瀑布标量场的混合暴胀。瀑布场的 $Z_2$ 对称性使暴胀子势免受来自瀑布耦合的量子修正而保持平坦,并在我们宇宙的 Hubble 视界内自发破缺于真空中,且不存在畴壁问题。我们证明,与瀑布场的 $Z_2$ 不变 Higgs portal 耦合负责再加热过程,从而在暴胀后产生足够高的再加热温度。在存在额外 $Z'_2$ 对称性时,其中一个瀑布场或另一个单重态标量场会成为暗物质候选者。特别是,我们发现预热足以解释瀑布暗物质的正确遗留密度。

英文摘要:

We study the hybrid inflation with a pseudo-Nambu-Goldstone boson inflaton and two waterfall scalar fields. The $Z_2$ symmetry for the waterfall fields keeps inflaton potential flat against quantum corrections coming from the waterfall couplings, and it is broken spontaneously in the vacuum without a domain wall problem within the Hubble horizon of our universe. We show that the $Z_2$ invariant Higgs portal couplings to the waterfall fields are responsible for the reheating process, leading to a sufficiently large reheating temperature after inflation. In the presence of an extra $Z'_2$ symmetry, one of the waterfall fields or another singlet scalar field becomes a dark matter candidate. In particular, we find that preheating is sufficient to account for the correct relic density of the waterfall dark matter.

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。

↑