广义超引力背景下弦理论的 Weyl 不变性。

Weyl Invariance of String Theories in Generalized Supergravity Backgrounds.

机构信息

Departamento de Física, Universidad de Murcia, Campus de Espinardo E-30100, Murcia, Spain.

Department of Physics, Kyoto University, Kyoto 606-8502, Japan.

出版信息

Phys Rev Lett. 2019 Mar 22;122(11):111602. doi: 10.1103/PhysRevLett.122.111602.

DOI:10.1103/PhysRevLett.122.111602

PMID:30951328

Abstract

We revisit Weyl invariance string theories in generalized supergravity backgrounds. A possible counterterm was constructed in a work by Sakamoto, Sakatani, and Yoshida, but it seems to be a point of controversy in some literatures whether or not it is nonlocal. To settle down this issue, we show that the counterterm may be local and exactly cancels out the one-loop trace anomaly in generalized supergravity backgrounds.

摘要

我们重新研究了广义超引力背景下的 Weyl 不变弦论。Sakamoto、Sakatani 和 Yoshida 的一项工作中构造了一个可能的反例项，但它是否是非局部的似乎在一些文献中存在争议。为了解决这个问题，我们表明该反例项可能是局部的，并能精确地消除广义超引力背景中的单圈迹反常。