Standard and hypergeometric representations for loop diagrams and the photon-photon scattering
Andrei I. Davydychev · arXiv (Cornell University) · 1993
By using the example of photon-photon scattering box diagrams, different representations for loop integrals are discussed. A connection between hypergeometric representation and dilogarithms is derived. An explicit analytic continuation formula to large values of Mandelstam variables is constructed.