论文标题
$μ$ - 杂化通货膨胀，重力暗物质和宇宙弦的随机重力波背景
$μ$-hybrid Inflation, Gravitino Dark Matter and Stochastic Gravitational Wave Background from Cosmic Strings
论文作者
论文摘要
我们提出了基于测量的$ u（1）_ {b-l} $最小超对称标准模型扩展的超对称$ $ $ $ hybrid通货膨胀模型的成功实现，其软超对称性破坏术语起着重要作用。成功的非热卵生生成具有重力暗物质可在$ 2 \ times 10^{7} \ Lessim t_r t_r \ Lessim 5 \ times 10^{9} $ GEV的范围内重新加热。 This corresponds to the predictions $2 \times 10^{-18} \lesssim r\lesssim 4 \times 10^{-13}$ for the tensor to scalar ratio, and $-2 \times 10^{-6} \lesssim dn_s/d\ln k \lesssim -5 \times 10^{-11}$ for the running of the scalar spectral index. $ b-l $打破量表估计为$ 6 \ times 10^{14} \ Lessim m/ \ text {gev} \ Lessim 10^{16} $，按标量频谱指数的核心价值计算，$ n_s = 0.9655 $，由Planck 2018中的参与者汇总，在二合一的参数中，该效果是在二合一的参数。范围$ 10^{ - 9} \ Lessimgμ__\ text {cs} \ Lessim 10^{ - 6} $对应于最近Nanograv 12.5-yr数据的2 $σ$内的随机引力波背景。
We present a successful realization of supersymmetric $μ$-hybrid inflation model based on a gauged $U(1)_{B-L}$ extension of the minimal supersymmetric standard model, with the soft supersymmetry breaking terms are playing an important role. Successful non-thermal leptogenesis with gravitino dark matter yields a reheat temperature in the range $2 \times 10^{7} \lesssim T_R \lesssim 5 \times 10^{9}$ GeV. This corresponds to the predictions $2 \times 10^{-18} \lesssim r\lesssim 4 \times 10^{-13}$ for the tensor to scalar ratio, and $-2 \times 10^{-6} \lesssim dn_s/d\ln k \lesssim -5 \times 10^{-11}$ for the running of the scalar spectral index. The $B-L$ breaking scale is estimated as $ 6 \times 10^{14}\lesssim M/ \text{GeV}\lesssim 10^{16}$, calculated at the central value of the scalar spectral index, $n_s =0.9655$, reported by Planck 2018. Finally, in a grand unified theory setup the dimensionless string tension parameter associated with the metastable strings is in the range $ 10^{-9} \lesssim Gμ_\text{cs} \lesssim 10^{-6}$ corresponding to a stochastic gravitational wave background lying within the 2$σ$ bound of the recent NANOGrav 12.5-yr data.
