论文标题
深色光子深色物质的重力产生由希格斯机制产生的质量
Gravitational production of dark photon dark matter with mass generated by the Higgs mechanism
论文作者
论文摘要
我们研究了通货膨胀期间深色光子暗物质的重力产生，当时暗光子通过希格斯机制获得质量。在先前的研究中，假定深色光子具有stückelberg质量，或者是由希格斯机制产生的质量，具有足够重的希格斯玻色子。在本文中，我们考虑了希格斯玻色子没有完全脱钩的情况。 Higgs场更改通货膨胀后的真空期望值。然后，深色光子质量也随通货膨胀后的时间而变化，纵向模式的时间演变与Stückelberg质量的情况不同。因此，深色光子能量密度的光谱可以在中间尺度和小尺度上具有两个峰。我们表明，暗光子是否可以解释其当前质量是否大于$ 6 \，μ{\ rm ev} \ times（h_i / 10^{14} \，{\ rm gev}） gev}）^{ - 3/2} $，$ h_i $是通货膨胀期间的哈勃参数。如果考虑较大的量规耦合常数，则需要更高的质量。 stückelberg质量的结果可以在小规格耦合常数的极限下再现。我们还评论量子重力理论中各种猜想所设定的约束。
We study the gravitational production of dark photon dark matter during inflation, when dark photons acquire mass by the Higgs mechanism. In the previous study, it was assumed that the dark photon has a Stückelberg mass, or a mass generated by the Higgs mechanism with a sufficiently heavy Higgs boson. In this paper we consider a case in which the Higgs boson is not fully decoupled; the Higgs field changes its vacuum expectation value after inflation. Then, the dark photon mass also changes with time after inflation, and the time evolution of the longitudinal mode is different from the case with a Stückelberg mass. Consequently, the spectrum of the dark photon energy density can have two peaks at an intermediate scale and a small scale. We show that the dark photon can explain the dark matter if its current mass is larger than $6 \, μ{\rm eV} \times (H_I / 10^{14} \, {\rm GeV})^{-4}$ and smaller than $0.8 \, {\rm GeV} \times (H_I / 10^{14} \, {\rm GeV})^{-3/2}$, with $H_I$ being the Hubble parameter during inflation. A higher mass is required if one considers a larger gauge coupling constant. The result for the Stückelberg mass can be reproduced in the limit of a small gauge coupling constant. We also comment on the constraints set by various conjectures in quantum gravity theory.
