Master integrals for electroweak corrections to $$gg\rightarrow \gamma \gamma $$: light quark contributions

Abstract

AbstractWe present a calculation of the master integrals (MI’s) required for the calculation of the Electroweak corrections to $$gg\rightarrow \gamma \gamma $$ g g → γ γ production in which the process contains a light quark loop. The integrals can be broken down into five categories based on the flow of the heavy vector bosons throughout the loop. Three of the families are planar, and two are non-planar. We determine a canonical basis for each family which allows an efficient solution of the resulting differential equations via iterated integrals. We calculate the families in relevant physical kinematics and obtain an efficient numerical evaluation based on an implementation of Chen-iterated integrals.