Vector dark matter production from inflation with symmetry breaking
Vector dark matter production from inflation with symmetry breaking
复制标题
DOI：
10.1103/physrevd.103.063526
复制
发表时间：
2020-10
影响因子：
5
通讯作者：
Borna Salehian;M. Gorji;H. Firouzjahi;S. Mukohyama
中科院分区：
文献类型：
--
作者：
Borna Salehian;M. Gorji;H. Firouzjahi;S. Mukohyama
我们提出了一个方案，矢量暗物质的生产对称性破缺结束时的通货膨胀。在这个模型中，与暗光子的量子涨落相关的累积能量密度解释了暗物质的当前能量密度。暴胀子是一个真实的标量场，而一个重的复杂标量场，如混合暴胀瀑布，在暗规范场下带电。在暴胀结束时，重场变成快子，迅速滚向其全局最小值，暗光子通过希格斯机制获得质量。为了防止暴胀过程中矢量场能量密度的衰减，我们在暴胀子和规范场之间引入耦合，使得能量被泵送到暗区。该装置可以产生观测到的暗物质丰度的暗光子的质量范围很广，再加热温度约为10 ^{12}$ GeV。该模型预测了宇宙弦在暴胀结束时的形成，其张力与CMB上界一致。
We present a scenario of vector dark matter production from symmetry breaking at the end of inflation. In this model, the accumulated energy density associated with the quantum fluctuations of the dark photon accounts for the present energy density of dark matter. The inflaton is a real scalar field while a heavy complex scalar field, such as the waterfall of hybrid inflation, is charged under the dark gauge field. After the heavy field becomes tachyonic at the end of inflation, rolling rapidly towards its global minimum, the dark photon acquires mass via Higgs mechanism. To prevent the decay of the vector field energy density during inflation, we introduce couplings between the inflaton and the gauge field such that the energy is pumped to the dark sector. The setup can generate the observed dark matter abundance for a wide range of the dark photon's mass and with the reheat temperature around $10^{12}$ GeV. The model predicts the formation of cosmic strings at the end of inflation with the tensions which are consistent with the CMB upper bounds.