We study the possibility of probing the scale of left-right symmetry breaking in the context of left-right symmetric models (LRSM). In LRSM, the right handed fermions transform as doublets under a newly introduced $SU(2{)}_R$ gauge symmetry. This, along with a discrete parity symmetry $\mathcal{P}$ ensuring identical gauge couplings of left and right sectors make the model left-right symmetric, providing a dynamical origin of parity violation in electroweak interactions via spontaneous symmetry breaking. The spontaneous breaking of $\mathcal{P}$ leads to the formation of domain walls in the early universe. These walls, if made unstable by introducing an explicit parity breaking term, generate gravitational waves (GW) with a spectrum characterized by the wall tension or the spontaneous $\mathcal{P}$ breaking scale, and the explicit $\mathcal{P}$ breaking term. Considering explicit $\mathcal{P}$ breaking terms to originate from Planck suppressed operators provides one-to-one correspondence between the scale of left-right symmetry and sensitivities of near future GW experiments. This is not only complementary to collider and low energy probes of TeV scale LRSM but also to GW generated from first order phase transition in LRSM with different spectral shape, peak frequencies as well as symmetry breaking scales.

中文翻译：

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通过畴壁的引力波探测左右对称性

我们研究了在左右对称模型 (LRSM) 的背景下探索左右对称破坏尺度的可能性。在 LRSM 中，右手费米子在新引入的$\mathrm{小号}ü(2{)}_R$规范对称。这与离散的奇偶对称性一起$\mathcal{磷}$确保左右扇区的相同规范耦合使模型左右对称，通过自发的对称性破坏提供电弱相互作用中奇偶性违反的动态起源。自发的断裂$\mathcal{磷}$导致在早期宇宙中形成畴壁。如果通过引入明确的宇称破缺项使这些墙变得不稳定，则会产生引力波 (GW)，其光谱的特征是墙张力或自发$\mathcal{磷}$打破规模，和明确的$\mathcal{磷}$打破术语。考虑显式$\mathcal{磷}$打破来自普朗克抑制算子的术语提供了左右对称尺度与近期 GW 实验的敏感性之间的一一对应关系。这不仅是对 TeV 尺度 LRSM 的对撞机和低能探测器的补充，而且是对 LRSM 中一阶相变产生的具有不同光谱形状、峰值频率以及对称破坏尺度的 GW 的补充。