论文标题
二头肌/凯克数据和二次重力
BICEP/Keck data and Quadratic Gravity
论文作者
论文摘要
二头肌和凯克（Keck）合作的最新结果在许多通货膨胀模型中占据了严格的界限，包括一些动机良好的模型。当爱因斯坦的理论达到通货膨胀量表时仍然存在重力，但可以通过引入在该规模上有效的二次曲率术语来避免重力。最近，还表明，这些术语可以符合稳定性和单位性的完全重力。在这里，通过关注从粒子物理学的角度最能动机的某些通货膨胀场景来计算这种二次重力的预测，并与二头肌/凯克约束进行比较，并已经在爱因斯坦重力中排除了：（关键）Higgs的膨胀和自然膨胀。第一种方案可以被视为最经济的选择，因为在标准模型中使用了唯一已知的基本标量字段确定加权，并且使用标准模型的几乎临界性来保留在扰动状态中。在第二个中，伪 - nambu-goldstone玻色子有助于通货膨胀动力学，其潜力自然是平坦的。结果表明，在两种情况下，都可以恢复与二次重力中观察性约束的一致性。
The recent results of the BICEP and Keck collaborations have put stringent bounds on many inflationary models, including some well-motivated ones. This is certainly the case when gravity remains described by Einstein's theory up to the inflationary scale, but can be avoided by introducing quadratic-in-curvature terms that are effective at that scale. Recently it has also been shown that these terms can UV complete gravity respecting stability and unitarity. Here the predictions of such quadratic gravity are computed and compared with the BICEP/Keck constraints by focusing on some of the inflationary scenarios that are best-motivated from the particle physics point of view and are already ruled out in Einstein gravity: (critical) Higgs inflation and natural inflation. The first scenario can be considered as the most economical option as the inflaton is identified with the only known elementary scalar field in the Standard Model and the near criticality of the Standard Model is used to remain in the perturbative regime. In the second one a pseudo-Nambu-Goldstone boson contributes to the inflationary dynamics and its potential is naturally flat. It is shown that in both scenarios one can restore the agreement with the observational constraints in quadratic gravity.
