A POWHEG generator for deep inelastic scattering
Abstract
We present a new event generator for the simulation of both neutral- and charged-current deep inelastic scattering (DIS) at next-to-leading order in QCD matched to parton showers using the POWHEG method. Our implementation builds on the existing POWHEG BOX framework originally designed for hadron-hadron collisions, supplemented by considerable extensions to account for the genuinely different kinematics inherent to lepton-hadron collisions. In particular, we present new momentum mappings that conserve the special kinematics found in DIS, which we use to modify the POWHEG BOX implementation of the Frixione-Kunszt-Signer subtraction mechanism. We compare our predictions to fixed-order and resummed predictions, as well as to data from the HERA ep collider. Finally we study a few representative distributions for the upcoming Electron Ion Collider.
- Publication:
-
Journal of High Energy Physics
- Pub Date:
- February 2024
- DOI:
- 10.1007/JHEP02(2024)023
- arXiv:
- arXiv:2309.02127
- Bibcode:
- 2024JHEP...02..023B
- Keywords:
-
- Deep Inelastic Scattering or Small-x Physics;
- Parton Shower;
- Resummation;
- High Energy Physics - Phenomenology;
- High Energy Physics - Experiment
- E-Print:
- 54 pages, 25 figures, code obtainable from svn://powhegbox.mib.infn.it/trunk/User-Processes-RES/DIS