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arXiv 2103.15931hep-th
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对偶不变西格玛模型的Beta函数

Beta functions for the duality-invariant sigma model

Roberto Bonezzi, Tomas Codina, Olaf Hohm

摘要:

利用具有$d$阿贝尔等距的玻色弦论的$O(d,d)$不变世界片理论计算了单圈处的beta函数和Weyl反常.我们表明,Weyl异常系数的消失意味着Maharana-Schwarz作用的运动方程。我们给出了一个自包含的介绍所需的技术,包括β函数,Weyl异常的二维西格玛模型和背景场方法。这就为本文的后续部分奠定了基础,本文将推广到更高的循环和$α'$修正。

英文摘要:

The $O(d,d)$ invariant worldsheet theory for bosonic string theory with $d$ abelian isometries is employed to compute the beta functions and Weyl anomaly at one-loop. We show that vanishing of the Weyl anomaly coefficients implies the equations of motion of the Maharana-Schwarz action. We give a self-contained introduction into the required techniques, including beta functions, the Weyl anomaly for two-dimensional sigma models and the background field method. This sets the stage for a sequel to this paper on generalizations to higher loops and $α'$ corrections.

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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