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arXiv · 2207.05578

The NNLO quark beam function for jet-veto resummation

Guido Bell·Kevin Brune·Goutam Das·Marcel Wald
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Abstract

We consider the quark beam function that describes collinear initial-state radiation that is constrained by a veto on reconstructed jets. As the veto is imposed on the transverse momenta of the jets, the beam function is subject to rapidity divergences, and we use the collinear-anomaly framework to extract the perturbative matching kernels to next-to-next-to-leading order (NNLO) in the strong-coupling expansion. Our calculation is based on a novel framework that automates the computation of beam functions in Mellin space and it provides the ingredients to extend jet-veto resummations for quark-initiated processes to NNLL$'$ accuracy.

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Guido Bell, Kevin Brune, Goutam Das, Marcel Wald. 2022-07-12. The NNLO quark beam function for jet-veto resummation. https://doi.org/10.1007/jhep01(2023)083

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