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arXiv 2003.06851hep-th
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在${\cal N}=1$ SQED情况下用高阶导数正则化的超对称理论中计算$β$ -函数的新算法的三回路验证

Three-loop verification of a new algorithm for the calculation of a $β$-function in supersymmetric theories regularized by higher derivatives for the case of ${\cal N}=1$ SQED

S. S. Aleshin, I. S. Durandina, D. S. Kolupaev, D. S. Korneev, M. D. Kuzmichev, N. P. Meshcheriakov, S. V. Novgorodtsev, I. A. Petrov, V. V. Shatalova, I. E. Sh… 展开作者

S. S. Aleshin, I. S. Durandina, D. S. Kolupaev, D. S. Korneev, M. D. Kuzmichev, N. P. Meshcheriakov, S. V. Novgorodtsev, I. A. Petrov, V. V. Shatalova, I. E. Shirokov, V. Yu. Shirokova, K. V. Stepanyantz

摘要:

我们验证了最近提出的一种方法,获得一个$β$ -功能的${\cal N}=1$超对称规范理论正规化的高阶导数的显式计算。根据这种方法,可以通过计算特殊修正的真空超图来找到一个$β$ -函数,而不用计算大量的两点超图。其结果是以关于环动量的双全导数的某种积分的形式产生的。在这里,我们比较了在一般$ξ$规范中,用这种方法和标准计算的帮助下,对${\cal N}=1$ SQED的三圈$β$函数所得到的结果。它们的重合证实了新方法的正确性和用于其推导的一般论证。我们还验证了在所考虑的近似NSVZ关系是有效的重整化群函数定义的裸耦合常数和定义的重整化耦合常数在HD+MSL计划,其两侧是规范无关的。

英文摘要:

We verify a recently proposed method for obtaining a $β$-function of ${\cal N}=1$ supersymmetric gauge theories regularized by higher derivatives by an explicit calculation. According to this method, a $β$-function can be found by calculating specially modified vacuum supergraphs instead of a much larger number of the two-point superdiagrams. The result is produced in the form of a certain integral of double total derivatives with respect to the loop momenta. Here we compare the results obtained for the three-loop $β$-function of ${\cal N}=1$ SQED in the general $ξ$-gauge with the help of this method and with the help of the standard calculation. Their coincidence confirms the correctness of the new method and the general argumentation used for its derivation. Also we verify that in the considered approximation the NSVZ relation is valid for the renormalization group functions defined in terms of the bare coupling constant and for the ones defined in terms of the renormalized coupling constant in the HD+MSL scheme, both its sides being gauge-independent.

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