Feynman integral reductions by intersection theory with orthogonal bases and closed formulae

Abstract

Abstract We present a prescription for choosing orthogonal bases of differential n-forms belonging to quadratic twisted period integrals, with respect to the intersection number inner product. To evaluate these inner products, we additionally propose a new closed formula for intersection numbers beyond d log forms. These findings allow us to systematically construct orthonormal bases between twisted period integrals of this type. In the context of Feynman integrals, this represents all diagrams at one-loop.

Keywords

• Scattering Amplitudes
• Higher-Order Perturbative Calculations
• Precision QED
• Specific QCD Phenomenology