JETPHOX

JETPHOX is a program to calculate the reactions h h -> gamma/hadron + jet + X. By integrating over the jet, one can also get the single inclusive photon/hadron cross section at NLO.
The switch for the production of a photon/hadron is done automatically according to the choice of fragmentation functions for photons/hadrons in the input.

A description of the program and results can be found in the papers:

JHEP 0205:028,2002 [hep-ph/0204023] [JHEP SERVER] (Cross-section of isolated prompt photons in hadron-hadron collisions)

Phys.Rev. D73:094007,2006 [hep-ph/0602133] [Phys. Rev. D server] (A new critical study of photon production in hadronic collision)

Phys.Rev. D79:114024,2009 [arXiv:0903.4834[hep-ph]] [Phys. Rev. D server] (Photon-Jet Correlations and Constraints on Fragmentation Functions)

Before you start using the program, please read the Readme carefully.

The old released version of the source code (v1.2.2) is available here. Compared to the older version (v1.0), the main changes are:

Interface with LAHPDF library. This library is mandatory, there are no more PDF sets included into JETPHOX. Because of that, the parameter file has been simplified. Note also that the user can choose for alpha_s either the LHAPDF routine which use the PDG implementation or a home-made routine, used by the preceding version, which solves numerically the renormalisation group equation at NLO.

Interface with ROOT. Only histograms are produced in the ROOT format.

Improvement of the isolation criterion. This new version implements a discrete version of the Frixione's isolation criterion.

The latest released version (v1.3.1_1) of JETPHOX is available, the source code is here. Compared to 1.3.1 : correction of the labels for nPDF in parameter.indat. Compared to 1.3.0, the main changes are : a regression has been fixed, the histo mode is now working; the normalisation is passed in the ntuple; the flag 3 for the isolation criterion has changed.

Compared to v.1.2.2, the main changes are:

Interface with ROOT. The ntuples are also available in the ROOT format (note that the variables in the ROOT ntuple have changed, see below). A pdf file describing the content of the ntuple can be found here.

JETPHOX with PDF uncertainties. Thanks to LHAPDF and the ROOT ntuple output format, it is now possible to call a given PDF set and obtain the full error band on the cross section coming from the various members (Nmem members in LHAPDF) of that set.

The oldest version (v1.0) is still available here.

The version (v1.3.1_2) of JETPHOX is available, the source code is here. Compared to 1.3.1_1 : implementation of the ATLAS isolation criterion, the transverse energy deposited is less that A*pt+B.

The version (v1.3.1_3) of JETPHOX is available, the source code is here. Compared to 1.3.1_2 : no need of cernlib, the sources of the routines used have incorporated in jetphox.

A beta version (v1.3.1_4) of JETPHOX is available, the source code is here. Compared to 1.3.1_3 : a new argument has been added to the parameter file to select the member of the pdf set.

Please send any questions/comments to guillet at lapth dot cnrs dot fr

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