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Automation of Beam and Jet functions at NNLO

Guido Bell, Kevin Brune, Goutam Das, Marcel Wald

SciPost Phys. Proc. 7, 021 (2022) · published 21 June 2022

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We present a novel framework to streamline the calculation of jet and beam functions to next-to-next-to-leading order (NNLO) in perturbation theory. By exploiting the infrared behaviour of the collinear splitting functions, we factorise the singularities with suitable phase-space parametrisations and perform the observable-dependent integrations numerically. We have implemented our approach in the publicly available code {\tt pySecDec} and present first results for sample jet and beam functions.

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