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arXiv 1504.05959hep-th
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六维多味$ϕ^3$理论的双圈重整化和迹anomaly

Two-loop renormalization of multiflavor $ϕ^3$ theory in six dimensions and the trace anomaly

Benjamin Grinstein, Andreas Stergiou, David Stone, Ming Zhong

摘要:

我们使用背景场方法和热核获得所有的counterterterms的共形耦合多味$ϕ^3$理论在六个时空维,定义在弯曲的时空和时空依赖的耦合双圈顺序。我们还包括时空依赖的质量条款的完整性。我们使用这些结果写一个一般表达式的痕迹异常。利用Weyl相容性条件,证明了该理论对某个自然候选量$\tilde{a}$的强$a$ -定理是不成立的,并得到了反常项中欧拉项系数$a$的三圈表达式.

英文摘要:

We use the background-field method and the heat kernel to obtain all counterterms to two-loop order of conformally-coupled multiflavor $ϕ^3$ theory in six spacetime dimensions, defined in curved spacetime and with spacetime-dependent couplings. We also include spacetime-dependent mass terms for completeness. We use these results to write a general expression for the trace anomaly. With the use of Weyl consistency conditions we are able to show that the strong $a$-theorem for a certain natural candidate quantity $\tilde{a}$ is violated in this theory, and obtain a three-loop expression for the coefficient $a$ of the Euler term in the anomaly.

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