arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2108.05026hep-thhep-ph
收藏

多规范耦合下${\cal N}=1$超对称理论的NSVZ关系

The NSVZ relations for ${\cal N}=1$ supersymmetric theories with multiple gauge couplings

Dmitrii Korneev, Dmitry Plotnikov, Konstantin Stepanyantz, Natalia Tereshina

摘要:

研究了多规范耦合下${\cal N}=1$超对称规范理论的NSVZ关系。作为例子,我们考虑MSSM和翻转的$SU(5)$模型,他们很容易重现的结果为两个循环$β$ -功能。对于与阿贝尔规范超场相互作用的${\cal N}=1$ SQCD,我们证明了Adler $D$ -函数的NSVZ方程是由NSVZ关系导出的.此外,我们推导出全回路方程描述如何NSVZ方程的理论与多规范耦合有限重整化下的变化。它们允许描述一组连续的NSVZ计划,其中精确的NSVZ $β$ -功能是有效的所有规范耦合常数。很有可能,这一类包括HD+MSL方案,如果理论通过高阶协变导数正则化,并且通过最小对数减法消除发散,则可以获得该方案。这就是为什么我们还讨论了如何构造多规范耦合理论的高阶导数正则化。据推测,这种正则化允许在所有循环中导出这些理论的NSVZ方程。本文作了这种推导的第一步,即把多重规范耦合理论的NSVZ方程改写成一种新的形式,把$β$函数与量子规范超场、Faddeev-Popov鬼场和物质超场的反常维数联系起来。这种新形式等价于原NSVZ关系,它是由三重规范-鬼点的非重整化定理的推广而来的,这也是本文导出的。

英文摘要:

We investigate the NSVZ relations for ${\cal N}=1$ supersymmetric gauge theories with multiple gauge couplings. As examples, we consider MSSM and the flipped $SU(5)$ model, for which they easily reproduce the results for the two-loop $β$-functions. For ${\cal N}=1$ SQCD interacting with the Abelian gauge superfield we demonstrate that the NSVZ-like equation for the Adler $D$-function follows from the NSVZ relations. Also we derive all-loop equations describing how the NSVZ equations for theories with multiple gauge couplings change under finite renormalizations. They allow describing a continuous set of NSVZ schemes in which the exact NSVZ $β$-functions are valid for all gauge coupling constants. Very likely, this class includes the HD+MSL scheme, which is obtained if a theory is regularized by Higher covariant Derivatives and divergences are removed by Minimal Subtractions of Logarithms. That is why we also discuss how one can construct the higher derivative regularization for theories with multiple gauge couplings. Presumably, this regularization allows to derive the NSVZ equations for such theories in all loops. In this paper we make the first step of this derivation, namely, the NSVZ equations for theories with multiple gauge couplings are rewritten in a new form which relates the $β$-functions to the anomalous dimensions of the quantum gauge superfields, of the Faddeev--Popov ghosts, and of the matter superfields. The equivalence of this new form to the original NSVZ relations follows from the extension of the non-renormalization theorem for the triple gauge-ghost vertices, which is also derived in this paper.

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。

↑