图函数与单值多重多项式
Graphical functions and single-valued multiple polylogarithms
摘要:
图函数是由费曼振幅产生的单值复函数。我们研究了它们的性质,并利用它们与多个多面体的联系来计算费曼周期。对于锯齿形周期和另外两族φ ^4周期,我们给出了模积的精确结果。这些周期被证明是表示为整数线性组合的单值多个多项式评估在一个。对于更大的家庭的“可构造”的图形,我们给出了一个算法,允许一个计算其周期的计算机代数。利用图函数理论证明了锯齿猜想。
英文摘要:
Graphical functions are single-valued complex functions which arise from Feynman amplitudes. We study their properties and use their connection to multiple polylogarithms to calculate Feynman periods. For the zig-zag and two more families of phi^4 periods we give exact results modulo products. These periods are proved to be expressible as integer linear combinations of single-valued multiple polylogarithms evaluated at one. For the larger family of 'constructible' graphs we give an algorithm that allows one to calculate their periods by computer algebra. The theory of graphical functions is used to prove the zig-zag conjecture.
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。