What question did this study set out to answer?

To implement and validate NNLO QCD corrections in the GENEVA framework for hadron collider processes.

January 14, 2026Journal of High Energy Physics0 citationsOpen Access

NNLO predictions with nonlocal subtractions and fiducial power corrections in GENEVA

SAS. AlioliIstituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca GBGeorgios BillisPaul Scherrer Institute ABAlessandro BroggioUniversity of Vienna

Key Points

To implement and validate NNLO QCD corrections in the GENEVA framework for hadron collider processes.
Implemented NNLO corrections using a nonlocal subtraction approach.
Combined subtraction with projection-to-Born method for fiducial power corrections.
Used Drell-Yan and Z +jet production as test cases at the LHC.
Employed N-jettiness as the resolution variable.
Achieved excellent agreement of NNLO corrections with nnlojet.
Discussed method extension to N3 LO QCD corrections for colour-singlet production.

Abstract

A bstract We present the implementation of next-to-next-to-leading order (NNLO) QCD fully-differential corrections within the G eneva framework, for both colour-singlet and colour-singlet+jet processes at hadron colliders, by employing a nonlocal subtraction approach. In particular, we discuss the implementation details and the challenges that arise when utilizing a dynamical infrared cutoff parameter. Additionally, we combine the subtraction with the projection-to-Born method in order to include fiducial power corrections. As a test case, we provide predictions for Drell-Yan and Z +jet production at the LHC, using N -jettiness as resolution variable. We validate the NNLO corrections of G eneva against nnlojet finding excellent agreement. Finally, we discuss how to extend our method to calculate the N 3 LO QCD fully-differential corrections to colour-singlet production at hadron colliders.

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