微小宇宙学常数的极轻宇宙标量场
Very Light Cosmological Scalar Fields from a Tiny Cosmological Constant
摘要：
讨论了膨胀宇宙中产生标量场质量项的机制。这个场的质量原来是由宇宙学常数产生的，如果受到共形对称的保护，它可以自然地很小，但在引力扇区中它是破缺的。它的质量相当于今天的哈勃时间。因此，这个标量场可能影响我们今天的宇宙，例如，它是标准模型参数的耦合和质量随时间变化的起源。
英文摘要：
We discuss a mechanism which generates a mass term for a scalar field in an expanding universe. The mass of this field turns out to be generated by the cosmological constant and can be naturally small if protected by a conformal symmetry which is however broken in the gravitational sector. The mass is comparable today to the Hubble time. This scalar field could thus impact our universe today and for example be at the origin of a time variation of the couplings and masses of the parameters of the standard model.
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。
