The NNLO quark beam function for jet-veto resummation

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 fram...

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Main Authors: Guido Bell, Kevin Brune, Goutam Das, Marcel Wald
Format: Article
Language:English
Published: SpringerOpen 2023-01-01
Series:Journal of High Energy Physics
Subjects:
Online Access:https://doi.org/10.1007/JHEP01(2023)083
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author Guido Bell
Kevin Brune
Goutam Das
Marcel Wald
author_facet Guido Bell
Kevin Brune
Goutam Das
Marcel Wald
author_sort Guido Bell
collection DOAJ
description 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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spelling doaj.art-a4ab98defa8545268aa46dcbacd2d7222023-04-30T11:04:56ZengSpringerOpenJournal of High Energy Physics1029-84792023-01-012023111910.1007/JHEP01(2023)083The NNLO quark beam function for jet-veto resummationGuido Bell0Kevin Brune1Goutam Das2Marcel Wald3Theoretische Physik 1, Center for Particle Physics Siegen, Universität SiegenTheoretische Physik 1, Center for Particle Physics Siegen, Universität SiegenTheoretische Physik 1, Center for Particle Physics Siegen, Universität SiegenTheoretische Physik 1, Center for Particle Physics Siegen, Universität SiegenAbstract 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.https://doi.org/10.1007/JHEP01(2023)083Effective Field Theories of QCDHigher-Order Perturbative Calculations
spellingShingle Guido Bell
Kevin Brune
Goutam Das
Marcel Wald
The NNLO quark beam function for jet-veto resummation
Journal of High Energy Physics
Effective Field Theories of QCD
Higher-Order Perturbative Calculations
title The NNLO quark beam function for jet-veto resummation
title_full The NNLO quark beam function for jet-veto resummation
title_fullStr The NNLO quark beam function for jet-veto resummation
title_full_unstemmed The NNLO quark beam function for jet-veto resummation
title_short The NNLO quark beam function for jet-veto resummation
title_sort nnlo quark beam function for jet veto resummation
topic Effective Field Theories of QCD
Higher-Order Perturbative Calculations
url https://doi.org/10.1007/JHEP01(2023)083
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