论文标题
辐射高原的EV Hubble规模通货膨胀：B-L扩展中的非常轻的充气，加热和暗物质
eV Hubble Scale Inflation with Radiative Plateau: Very light Inflaton, Reheating & Dark Matter in B-L Extensions
论文作者
论文摘要
我们研究了类似辐射高原的通货膨胀\＆z $ _ {bl} $ - 在最小的B-L扩展模型中，Portal Freeze-In fermionic暗物质（DM）。 u（1）$ _ {b-l} $ higgs负责沉重的中微子群众，还可以在早期的宇宙中驱动通货膨胀，这要归功于重型中微子\＆z $ _ {bl} $ gauge boson的辐射校正。在我们为U（1）$ _ {B-l} $的基准选择中，$ g_ {b-l} \ sim10^{ - 4} $，一个光Z $ _ {bl} $ boson可以通过当前和未来的生命周期实验，例如Faser和Faser 2，例如在Faser和lhc，Ship，ship，ship，belb，belb，belb，bell等。对于基准，通货膨胀的哈勃量表（$ \ Mathcal {h} _ {inf} $）非常低（$ \ nathcal {h} _ {inf} = \ Mathcal {o}（o}（100）$ ev） Efteraton非常小。我们研究了具有充气/b-l希格斯和标准模型（SM）希格斯的2个场系统，并发现当水平向SM HIGGS方向的水方向在标量场演化的轨迹中张开时，会发生相当高的温度加热。
We study radiative plateau-like inflation \& Z$_{BL}$-portal freeze-in fermionic dark matter (DM) in a minimal B-L extended model. The U(1)$_{B-L}$ Higgs, responsible for heavy neutrino masses, also drives inflation in the early universe, thanks to radiative corrections from the heavy neutrinos \& the Z$_{BL}$ gauge boson. In our benchmark choice for the U(1)$_{B-L}$ gauge coupling $g_{B-L}\sim10^{-4}$, a light Z$_{BL}$ boson can be explored by current and future lifetime frontier experiments, such as FASER and FASER 2 at the LHC, SHiP, Belle II and LHCb. For the benchmark, the Hubble scale of inflation ($\mathcal{H}_{inf}$) is very low ($\mathcal{H}_{inf} = \mathcal{O}(100)$ eV) \& the inflaton turns out to be very light with mass of $\mathcal{O}(1)$ eV, and consequently the decay width of inflaton is extremely small. We investigate a 2-field system with the inflaton/B-L Higgs and the Standard Model (SM) Higgs, and find that the reheating with a suffuciently high temperature occurs when the water-fall direction to the SM Higgs direction opens up in the trajectory of the scalar field evolution.
