量子跷跷板宇宙学:来自泡利阻塞的加热阶段
Quantum Seesaw Cosmology: A Heating Phase from Pauli Blocking
- New York University Abu Dhabi(纽约大学阿布扎比分校)
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC(ABC联邦大学自然与人文科学中心)
机构由 AI 辅助整理,请以论文原文为准。
中文总结 AI 辅助
该研究提出量子跷跷板宇宙学中的新加热机制,右手中微子填充受限动量空间导致泡利阻塞,使标准模型温度随尺度因子按 $T \propto a^{+3/8}$ 增加,区别于传统再加热的 $T \propto a^{-3/8}$ 标度。
中文摘要 AI 辅助
在跷跷板宇宙学中,标量场通过右手中微子(RHNs)对标准模型(SM)进行再加热,这些右手中微子通过跷跷板机制产生微小的中微子质量。当右手中微子迅速填充受限的动量空间区域时,宇宙膨胀不断打开新的费米子态,这些态随后被标量衰变重新填充,从而维持近似恒定的物理右手中微子密度。这产生了一种新颖的加热机制,其中标准模型温度随尺度因子按 $T \propto a^{+3/8}$ 增加,与物质主导再加热期间传统的 $T \propto a^{-3/8}$ 标度形成鲜明对比。
英文摘要
In Seesaw Cosmology, a scalar field reheats the Standard Model (SM) through right-handed neutrinos (RHNs), which generate tiny neutrino masses through the seesaw mechanism. When RHNs rapidly fill a restricted momentum-space region, expansion continually opens new fermionic states that are refilled by subsequent scalar decays, maintaining an approximately constant physical RHN density. This gives rise to a novel heating regime in which the SM temperature increases with the scale factor as $T \propto a^{+3/8}$, in sharp contrast to the conventional $T \propto a^{-3/8}$ scaling during matter-dominated reheating.