JetViP 1.1: Calculating One- and Two-Jet Cross Sections with Virtual Photons in NLO QCD
B. Pötter
TL;DR
JetViP 1.1 provides a fully integrated FORTRAN 77 framework for calculating inclusive single- and dijet cross sections in $eP$ and $e\gamma$ scattering at NLO QCD across a continuous photon virtuality $Q^2$. It combines direct and resolved virtual-photon contributions using phase-space slicing, with a dedicated subtraction term that links DIS and photoproduction via a $Q^2$-dependent virtual photon PDF and MSbar factorization. The package supports multiple virtual-photon PDF models (GRS, SaS, DG), includes both Snowmass cone and $k_T$-like jet definitions via $R_{sep}$, and provides a flexible input system plus an extensible kincut routine for experiment-specific cuts. It also delivers practical guidance on installation and performance, including typical running times for LO and NLO calculations. This work enables precise tests of perturbative QCD and the extraction of $\alpha_s$, $\Lambda_{\overline{\text{MS}}}$, and parton densities over a broad kinematic range.
Abstract
JetViP is a computer program for the calculation of inclusive single- and dijet cross sections in eP- and e-gamma-scattering in NLO QCD. The virtuality of the photon, radiated by the incoming electron, can be chosen in a continuous range, reaching from photoproduction into deep inelastic scattering. The various contributions to the full jet cross section, including the resolved photon contributions, are implemented. The calculation is based on the phase-space-slicing method.