arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0904.3729hep-ph
收藏

重夸克产生和Bhabha散射单圈主积分的泛函方程

Functional equations for one-loop master integrals for heavy-quark production and Bhabha scattering

Bernd A. Kniehl, Oleg V. Tarasov

摘要:

获得功能方程的方法,最近提出的作者之一,适用于单圈盒积分需要在计算辐射校正重夸克生产和Bhabha散射。我们提出了这些积分与不同的参数和盒积分与所有传播子是无质量之间的关系。事实证明,函数方程是相当有用的寻找虚部和执行解析延拓的费曼积分。对于Bhabha散射中所需的盒主积分,导出了一种新的超几何函数表示法,该表示法允许一重积分表示。重夸克产生的主积分的超几何表示由函数方程得出。

英文摘要:

The method for obtaining functional equations, recently proposed by one of the authors, is applied to one-loop box integrals needed in calculations of radiative corrections to heavy-quark production and Bhabha scattering. We present relationships between these integrals with different arguments and box integrals with all propagators being massless. It turns out that functional equations are rather useful for finding imaginary parts and performing analytic continuations of Feynman integrals. For the box master integral needed in Bhabha scattering, a new representation in terms of hypergeometric functions admitting one-fold integral representation is derived. The hypergeometric representation of a master integral for heavy-quark production follows from the functional equation.

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。

↑