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arXiv 2501.06307hep-ph
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$\mathbf{SU(3)_c\times SU(2)_L\times SU(2)_R \times U(1)_{B-L}}$ 中的 $\mathbf\mu$-混合暴胀与亚稳态宇宙弦

$\mathbfμ$-Hybrid Inflation and Metastable Cosmic Strings in $\mathbf{SU(3)_c\times SU(2)_L\times SU(2)_R \times U(1)_{B-L}}$

Muhammad Nadeem Ahmad, Maria Mehmood, Mansoor Ur Rehman, Qaisar Shafi

发表信息：
Phys.Rev.D 111(2025)8,083526
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AI总结：

在左右对称模型框架内发展了 $\mu$-混合暴胀图景，通过引入 $R$-对称性破缺项实现了两阶段对称性破缺、暴胀、轻子生成、亚稳态宇宙弦与引力子暗物质，且符合观测与再加热温度约束。

摘要：

我们在由规范对称群 $G_{3221} = SU(3)_c \times SU(2)_L \times SU(2)_R \times U(1)_{B-L}$ 定义的左右对称模型框架内，发展了基于 $\mu$-混合暴胀的图景。该模型具有两阶段对称性破缺至标准模型的过程，暴胀发生在两个阶段之间，导致 $SU(2)_R$ 破缺至 $U(1)_R$ 期间产生的原初磁单极子被稀释。第二次对称性破缺产生了亚稳态宇宙弦网络，其产生的引力波可被当前及未来的实验观测到。该模型的关键在于在超势中引入 $R$-对称性破缺项，这有助于解释第一次对称性破缺能标的起源，并确保在最小（正则）Kähler 势下实现实验可行的暴胀。我们证明该模型成功实现了一致的暴胀、轻子生成、亚稳态宇宙弦和引力子暗物质，且均符合观测数据以及来自轻子生成和引力子过量产生界限对再加热温度的约束。我们探讨了将 $G_{3221}$ 嵌入规范对称性 $G_{422} = SU(4)_c \times SU(2)_L \times SU(2)_R$ 的可能性，并简要讨论了质子衰变预测，这可通过即将进行的实验进行检验。

英文摘要：

We develop a scenario based on $μ$-hybrid inflation within the framework of a left-right symmetric model defined by the gauge symmetry group $G_{3221} = SU(3)_c \times SU(2)_L \times SU(2)_R \times U(1)_{B-L}$. This model features a two-stage symmetry breaking to the Standard Model, with inflation occurring between the two stages, resulting in the dilution of primordial monopoles produced during the symmetry breaking of $SU(2)_R$ to $U(1)_R$. The second symmetry breaking gives rise to a network of metastable cosmic strings, which produces gravitational waves that can be observed by current and future experiments. A crucial aspect of this model is the inclusion of $R$-symmetry breaking terms in the superpotential, which helps explain the origin of the first symmetry breaking scale and ensures experimentally viable inflation with a minimal (canonical) Kähler potential. We show that the model successfully implements consistent inflation, leptogenesis, metastable cosmic strings, and gravitino dark matter, all in agreement with the observational data and constraints on reheating temperature from leptogenesis and gravitino overproduction bounds. We explore the potential embedding of $G_{3221}$ within the gauge symmetry $G_{422} = SU(4)_c \times SU(2)_L \times SU(2)_R$, and provide a brief discussion on the proton decay predictions, which can be tested by the upcoming experiments.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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