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arXiv 0803.3964hep-phhep-th
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优化降低单环路幅度

Optimizing the Reduction of One-Loop Amplitudes

P. Mastrolia, G. Ossola, C. G. Papadopoulos, R. Pittau

摘要:

我们提出了一个优化的减少算法的单圈振幅的主积分。它是基于开发的多项式结构的被积函数时,评价值的回路动量满足多个切割条件,出现在OPP方法。重建的多项式,需要的完整的减少,是渲染非常通用的,通过使用基于离散傅立叶变换的投影技术。这种新的实现方法被应用于u d-bar-> W+- W+的非线性光学QCD修正。

英文摘要:

We present an optimization of the reduction algorithm of one-loop amplitudes in terms of master integrals. It is based on the exploitation of the polynomial structure of the integrand when evaluated at values of the loop-momentum fulfilling multiple cut-conditions, as emerged in the OPP-method. The reconstruction of the polynomials, needed for the complete reduction, is rended very versatile by using a projection-technique based on the Discrete Fourier Transform. The novel implementation is applied in the context of the NLO QCD corrections to u d-bar --> W+ W- W+.

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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