Implications of gravitational waves for supersymmetric grand unification
Implications of gravitational waves for supersymmetric grand unification
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DOI：
10.1103/physrevd.104.035031
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发表时间：
2020-11
影响因子：
5
通讯作者：
So Chigusa;Y. Nakai;Jiaming Zheng
中科院分区：
文献类型：
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作者：
So Chigusa;Y. Nakai;Jiaming Zheng
基于SO（10）$的超对称大统一是标准模型之外最有吸引力的物理学范式之一。受最近NANOGrav信号的启发，我们讨论了探测由宇宙弦网络发射的随机引力波背景对SO（10）大统一的影响。从一个最小的模型与多个步骤的对称性破缺，我们表明，它通常更喜欢一个高的中间尺度以上10 ^{14}\mathrm{GeV}$，这是可观测的原始引力波的青睐。观测到的谱可以潜在地缩小宇宙弦尺度的可能范围，并通过要求规范耦合统一来限制统一耦合和统一尺度。作为高宇宙弦尺度的一个间接结果，中微子丰度对理论施加了重要的限制。这些是补充质子衰变的约束和探测超对称SO（10）$统一理论的不同方面。
Supersymmetric grand unification based on $SO(10)$ is one of the most attractive paradigms in physics beyond the Standard Model. Inspired by the recent NANOGrav signal, we discuss the implications of detecting a stochastic gravitational wave background emitted by a network of cosmic strings for the $SO(10)$ grand unification. Starting from a minimal model with multiple steps of symmetry breaking, we show that it generally prefers a high intermediate scale above $10^{14}\, \mathrm{GeV}$ that is favored by observable primordial gravitational waves. The observed spectrum can potentially narrow the possible range of the cosmic string scale and restricts the unified couplings and the unification scale by requiring gauge coupling unification. As an indirect consequence of the high cosmic string scale, the monopole abundance places non-trivial constraints on the theory. These are complementary to the proton decay constraints and probe different facets of supersymmetric $SO(10)$ unification theories.