Spinners
      Some notes about JETPHOX.  When the questions arose during Hal's talk on direct gamma
my mike was broken.
Dave Underwood

Jetphox  does direct production  of gamma-jet    in LO and NLO,
and also separately does background  which is other QCD sources of photons in LO and NLO.
  There are links to papers by the group which wrote it and supports it, and I have  some excerpts from CERN WIKI pages
Jetphox uses any of the hundred or so PDF methods which are compiled in the LHAPDF program / collection.

The general links are:
http://lapth.cnrs.fr/PHOX_FAMILY/main.html
http://lapth.cnrs.fr/PHOX_FAMILY/jetphox.html
some details are in:
http://lapth.cnrs.fr/PHOX_FAMILY/diphox_slicing.html
http://lapth.cnrs.fr/PHOX_FAMILY/diphox_event-generation.html

There is a lot of discussion of isolation cuts, how the programs work, etc in
Eur.Phys.J. C 16, 311 (2000) [hep-ph/9911340]
Even though this particular paper is motivated by 2 gamma production faking the Higgs..

Jetphox has two modes but also two kinds of output for each mode, and also LO or NLO.
A)  parton level rapidity  acceptance cuts for jets and gamma  i.e. histogram mode like a theory curve.
            but you must still put in isolation cuts around the photon for the generator
            and it still does higher order photon radiation, not only compton direct gamma
        It also makes separate histograms of the photons from parton -> fragmentation
B)  event generation with  fragmentation of the away side jet
               (7 or 8 fragmentation models are available)
          and you have to use the event trees and your own jet processing
          I have not used this yet, and am still learning about it.
===================================================================
      I ran jetphox again with the jet cut (parton) set the way Jean-Philipe Guillet told me to.
For now I have jet cuts at +- 0.7 in rapidity, photon cuts at 1.05 to 2.0
isolation 5% of E gamma within cone of 0.2
pdf is CTEQ66

  This is all extremely preliminary  but encouraging for the learning curve.

==============================================================================
jetphox stuff

A description of the physics concerns, a little about the program, and some 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)

use of jetphox in Atlas   in 2013  slide 7
moriond.in2p3.fr/QCD/2013/SundayAfternoon/Lafaye.pdf‎

============================================
  LHAPDF   collection of PDFs  which are used in jetphox
papers
https://lhapdf.hepforge.org/pubs

list of pdf files  (hundred-s )
http://www.hepforge.org/archive/lhapdf/pdfsets/current/

======================================================
# Type of fragmentation functions for hadron

# hadrons
#       01:  AKK08
#      02:  DSS
#      03:  HKNS
#      04:  AKK05
#      05:  BKK
#      06:  KKP
#      07:  Kretzer
#      08:  BFGW best fit
#      09:  BFGW large Ng
#      10: BFGW low Ng
#       11: KKKS08 (into heavy-quark hadrons)
#
##########################################################################
# choice of jet algorithm: "kt": Durham kt, "co": cone, "se": with seeds
# or "d0": midpoint algorithm (to be used with "ho" merging rules)
kt

====================================================
more about jetphox
 ggd.dat the_name_you_wish.root (for the direct contribution)
  ggo.dat the_name_you_wish.root (for the one fragmentation contribution)
  ggt.dat the_name_you_wish.root (for the two fragmentation contribution)