arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1710.08021hep-th
收藏

关于高阶导数规范理论

On higher-derivative gauge theories

Lorenzo Casarin

摘要:

在这项工作中,我们研究的主要性质和一个杨米尔斯理论的单圈重整化的动力学项也包含一个四阶微分算子,特别是,我们添加到杨米尔斯拉格朗日最普遍的贡献,质量维度6,加权的维数参数。该模型是可重正化的;在文献中,已经报道了规范耦合的β函数的两个值,一个是使用热核方法获得的,另一个是使用费曼图获得的。在这项工作中,我们使用热核技术重复计算,确认后一个结果。我们还考虑了与物质的耦合。然后,我们研究了模型的超对称扩展,这是一个不平凡的任务,因为复杂的结构的高阶导数项。一些部分结果是已知的,但完整的超对称非阿贝尔高阶导数规范理论的β函数的计算是缺失的。我们利用arXiv:hep-th/0505082中导出的6维时空中杨-米尔斯场的(未扩展的)超对称高导数拉格朗日密度;通过降维,我们得到了4维时空中N=1和N=2的超对称高导数超杨-米尔斯拉格朗日量,我们使用热核计算其β函数。我们还推导了N=4超对称的beta函数。

英文摘要:

In this work we study the main properties and the one-loop renormalization of a Yang-Mills theory in which the kinetic term contains also a fourth-order differential operator; in particular, we add to the Yang-Mills Lagrangian the most general contribution of mass dimension six, weighted with a dimensionful parameter. This model is renormalizable; in the literature two values for the beta function for the gauge coupling have been reported, one obtained using the heat kernel approach and one with Feynman diagrams. In this work we repeat the computation using heat kernel techniques confirming the latter result. We also considered coupling with matter. We then study the supersymmetric extension of the model; this is a nontrivial task because of the complicate structure of the higher-derivative term. Some partial results were known, but a computation of the beta functions for the full supersymmetric non-Abelian higher-derivative gauge theory was missing. We make use of the (unextended) supersymmetric higher-derivative Lagrangian density for the Yang-Mills field in six spacetime dimensions derived in arXiv:hep-th/0505082; by dimensional reduction we obtain the N=1 and N=2 supersymmetric higher-derivative super-Yang-Mills Lagrangian in four spacetime dimensions, whose beta function we evaluate using heat kernels. We also deduce the beta function for N=4 supersymmetry.

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。

↑