JetViP 2.1: the hbook version

Abstract

We present an update of the JetViP 1.1 program for performing fixed NLO calculations in jet production including direct and resolved components in a continuous range of photon virtuality Q 2 . The new version allows to access the full event record on the parton level. The program is set up such that hbook can be used to fill histograms. The phase space generator has been optimized and the azimuthal dependence of the cross sections is taken into account in LO. We comment on recent comparisons between various NLO programs for jet production at HERA. We demonstrate that the E T cut for dijet cross sections is not infrared safe.

Factorization scheme and scale dependence in diffractive dijet production at lowQ2

“…They have been implemented in the NLO Monte Carlo program JETVIP [16]. We have adapted this NLO framework to diffractive dijet production.…”

Event shapes in e+e annihilation and deep inelastic scattering

“…Beyond leading order, perturbative calculations involve complex cancellations between soft and collinear real and virtual contributions and are nearly always left to general-purpose "fixed-order Monte Carlo" programs. The current state of the art is next-to-leading order (NLO), and available programs include: for e + e − to 3 jets, EVENT [41], EERAD [42] and EVENT2 [43]; for e + e − to 4 jets, Menlo Parc [44], Mercutio [45] and EERAD2 [46]; for DIS to 2+1 jets, MEPJET [47], DISENT [43] and DISASTER++ [48]; and for all the above processes and additionally DIS to 3 + 1 jets and various hadron-hadron and photo-production processes, NLOJET++ [49,50] (for photo-production, there is additionally JETVIP [51]). In recent years much progress has been made towards NNLO calculations, though complete results remain to be obtained (for a review of the current situation, see [52]).…”

From Factorization to Its Breaking in Diffractive Dijet Production

“…The NLO corrections for virtual jet photoproduction have been implemented in the NLO Monte Carlo program JETVIP 18 and adapted to diffractive dijet production in 15 . The subtraction term, which is absorbed into the PDFs of the virtual photon f a/γ (x γ , M γ ), can be found in 19 .…”