arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.03639hep-th
收藏

来自前向限值的单循环关联函数和BCJ分子

One-loop Correlators and BCJ Numerators from Forward Limits

Alex Edison, Song He, Oliver Schlotterer, Fei Teng

摘要:

本文给出了任意偶数维中的规范理论的单圈定距弦关联函数的新公式,其中规范玻色子、费米子和标量的任意组合在圈中运行。我们的研究结果是由新的所有多重表达式的树级两个费米子的RNS形式主义,非常类似于纯玻色子的。在将树级关联函数的极限与额外的一对费米子/玻色子一起向前推进之后,单圈关联函数变成了矢量和旋量表示中洛伦兹迹的组合。这两类迹之间的同一性体现了所有的超对称抵消和圈动量的幂次计数。我们还获得宇称奇贡献的手征费米子向前限制。利用杨-米尔斯理论中的树级方法,结合双伴随标量,可以从线性化传播子的图中提取满足Bern-Carrasco-Johansson(BCJ)对偶性的单圈分子.最后,我们得到流线型表达式BCJ分子多达七个点,使用多粒子场。

英文摘要:

We present new formulas for one-loop ambitwistor-string correlators for gauge theories in any even dimension with arbitrary combinations of gauge bosons, fermions and scalars running in the loop. Our results are driven by new all-multiplicity expressions for tree-level two-fermion correlators in the RNS formalism that closely resemble the purely bosonic ones. After taking forward limits of tree-level correlators with an additional pair of fermions/bosons, one-loop correlators become combinations of Lorentz traces in vector and spinor representations. Identities between these two types of traces manifest all supersymmetry cancellations and the power counting of loop momentum. We also obtain parity-odd contributions from forward limits with chiral fermions. One-loop numerators satisfying the Bern-Carrasco-Johansson (BCJ) duality for diagrams with linearized propagators can be extracted from such correlators using the well-established tree-level techniques in Yang-Mills theory coupled to biadjoint scalars. Finally, we obtain streamlined expressions for BCJ numerators up to seven points using multiparticle fields.

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。

↑