论文标题
Smart U（1）$ _ x $ $ - $带有轴，右手中微子，两个Higgs Doublets和u（1）$ _ x $量规对称的标准型号
SMART U(1)$_X$ $-$ Standard Model with Axion, Right handed neutrinos, Two Higgs doublets and U(1)$_X$ gauge symmetry
论文作者
论文摘要
为了解决粒子物理和宇宙学标准模型（SM）的五个基本缺点，我们提出了一个智能U（1）$ _ x $模型，即SM的$ U（1）_x \ times u（times u（1）_ {pq} $ SM的扩展。 $ u（1）_x $量规对称是众所周知的$ u（1）_ {b-l} $对称的概括，$ u（1）_ {pq} $是全球peccie-quinn（pq）sommetry。添加了三个右手中微子，以取消$ U（1）_x $相关的异常，并且它们在理解观察到的中微子振荡并通过瘦素发生在宇宙中观察到的巴里昂不对称性起着至关重要的作用。 PQ对称性有助于解决强大的CP问题，并提供轴心作为引人注目的暗物质（DM）候选者。 $ u（1）_x $ gauge对称性使我们能够使用$ h_ {inf} \ lyseSim 2 \ times 10^{7} $ GEV实现拐点通货膨胀方案，其中$ h_ {inf} $是通货膨胀期间Hubble参数的值。这使我们能够克服潜在的轴突壁问题以及轴突等效问题。正如我们简要显示的那样，可以将Smart U（1）$ _ x $模型与$ su（5）$合并。
To address five fundamental shortcomings of the Standard Model (SM) of particle physics and cosmology, we propose a SMART U(1)$_X$ model which is a $U(1)_X \times U(1)_{PQ}$ extension of the SM. The $U(1)_X$ gauge symmetry is a generalization of the well-known $U(1)_{B-L}$ symmetry and $U(1)_{PQ}$ is the global Peccie-Quinn (PQ) symmetry. Three right handed neutrinos are added to cancel $U(1)_X$ related anomalies, and they play a crucial role in understanding the observed neutrino oscillations and explaining the observed baryon asymmetry in the universe via leptogenesis. The PQ symmetry helps resolve the strong CP problem and also provides axion as a compelling dark matter (DM) candidate. The $U(1)_X$ gauge symmetry enables us to implement the inflection-point inflation scenario with $H_{inf} \lesssim 2 \times 10^{7}$ GeV, where $H_{inf}$ is the value of Hubble parameter during inflation. This allows us to overcome a potential axion domain wall problem as well as the axion isocurvature problem. The SMART U(1)$_X$ model can be merged with $SU(5)$ as we briefly show.
