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arXiv 1104.4067hep-ph
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压缩张量Feynman积分的计算

Calculating contracted tensor Feynman integrals

J. Fleischer, T. Riemann

摘要:

最近导出的方法张量约化的5点单圈费曼积分表示的张量系数标量1点到4点的费曼积分完全代数。在这封信中,我们推导出非常紧凑的代数表达式的压缩张量积分与外部动量。这是基于有符号的未成年人加权与标量产品的外部动量的总和。有了这些收缩,人们可以构建所考虑的矩阵元素的不变振幅,并在高能对撞机,如LHC和ILC的无质量和大量的多粒子生产的单循环贡献的评估预计将非常有效地执行。

英文摘要:

A recently derived approach to the tensor reduction of 5-point one-loop Feynman integrals expresses the tensor coefficients by scalar 1-point to 4-point Feynman integrals completely algebraically. In this letter we derive extremely compact algebraic expressions for the contractions of the tensor integrals with external momenta. This is based on sums over signed minors weighted with scalar products of the external momenta. With these contractions one can construct the invariant amplitudes of the matrix elements under consideration, and the evaluation of one-loop contributions to massless and massive multi-particle production at high energy colliders like LHC and ILC is expected to be performed very efficiently.

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。

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