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arXiv 2402.04712hep-thgr-qc
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关于引力中Weyl规范对称性的注记

A note on Weyl gauge symmetry in gravity

N. Mohammedi

AI总结:

本文通过结合规范场与标量场构建广义标度不变Weyl仿射联络,为标量场和规范场的动能项提供几何解释,并指出标度不变性在宇宙学常数和质量项存在时转化为对偶变换。

摘要:

一个至多包含两个导数的标度不变引力理论,除了黎曼度量之外,还需要一个标量场和(或)一个规范场。该规范场通常用于构造Weyl几何的仿射联络。在本文中,我们将规范场和标量场结合起来,构建了一个广义的标度不变Weyl仿射联络。由这个广义Weyl仿射联络构造的Ricci张量和Ricci标量,自然包含了标量场和规范场的动能项。这为这些项提供了几何解释。文中还表明,在存在宇宙学常数和质量项的情况下,标度不变性并未完全丧失,而是转变为一种联系各个场的对偶变换。

英文摘要:

A scale invariant theory of gravity, containing at most two derivatives, requires, in addition to the Riemannian metric, a scalar field and (or) a gauge field. The gauge field is usualy used to construct the affine connection of Weyl geometry. In this note, we incorporate both the gauge field and the scalar field to build a generalised scale invariant Weyl affine connection. The Ricci tensor and the Ricci scalar made out of this generalised Weyl affine connection contain, naturally, kinetic terms for the scalar field and the gauge field. This provides a geometric interpretation for these terms. It is also shown that scale invariance in the presence of a cosmological constant and mass terms is not completely lost. It becomes a duality transformation relating various fields.

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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