#/bin/sh
# The most recent patched program is directly available as
# POWHEG-hvq-pl[n].tar.gz, where [n] is the patch level.
# If you need previous versions, apply the patches in order starting
# with the original version POWHEG-hvq.tar.gz, and follow the instructions
# below.
#     
#     
#     patch1:	19-9-2007, (P. Nason), Azimuthal symmetry bug
#             	Problem: events are not randomly distributed in azimuth
#     	        Remedy: rotate events in azimuth before filling the
#     		Les Houches Interface
#     
#     
#     
#     patch2: fix flavour bug in mlmpdf ( up <-> down exchanged )
#     	      Problem: mlmpdf has up and down numbered as 1 and 2
#             Remedy: swap up and down in mlmpdf output
#             fix typo in mcnlofile.f (prevented compilation)
# 	      fix flavour thresholds in pdf interface
#             Problem: in some pdf heavy quark densities are not exactly zero below threshold;
#                      They were set to zero in pdf interface, but with wrong thresholds. 
#     	      rename cteq5hq1 to ctq5hq1 in pdf sets for mlmpdf
#     	      fix cteq4-cteq5 common block clashes in hvqpdfpho.f
#     	      Include lhapdf interface. To use lhapdf uncomment the approrpiate
#             lines in the main file. Include two lines
#             lhans1 num1
#             lhans2 num2
#             in the powheg.input file, where num1 and num2 should be the pdf numbers
#             according to the lhaglue interface of the two incoming hadrons
#
#     patch3: fix cteq65 (zero lambda) bugfix in lhapdfif
#             Problem: The lha interface to cteq65 gives zero lambda. The
#                      bug workaround in lhapdfif.f was incorrect (xlam was not set)
#             Fix: set xlam
#             fix call to analize in Herwig interfaces
#             Problem: in case of error analize should not be called (event is inconsistent)
#             Fix: insert conditional in main-HERWIG.f and main-HERWIG-lhef.f
#             Bug in top branching ratios
#             Problem: wrong top branchings (pointed out by Ulrich Husemann, 1/8/2008)
#             Fix: fix coding error in pickwdecays (in POWHEG-hvq.f)
#
#     patch4: Problem: In the integration routine (mint) average among different iterations was incorrect;
#             Fix: correct it. It will slightly affect the result for the total cross section.
#             Problem: Semileptonic decays could not be generated (as wrongly stated in the monual, and
#                      in the comments in powheg.input files in the example directories, setting
#                      topdecaymode 10011 does not select only semileptonic decays with an electron. It
#                      also selects hadronic modes with one top giving an up and the other giving a charm).
#                      (reported by Riccardo Di Sipio 5/5/2009)
#             Fix: add an optional flag; setting: semileptonic 1 in the powheg.input file filters out only
#                  semileptonic events.  For example, with topdecaymode 10011 and semileptonic 1 one gets
#                  only events with one top going to an electron or positron, and the other into any hadron.
#             Problem: there was a minor tecnical error in the pt2solve function, with almost invisible
#                      consequences in the generation of radiation.
#             Fix: correct the error.
#	      Problem: azimuthal correlation between t, tbar and radiated parton not symmetric under
#                      parity (bug inherited from MNR code). Does not affect distributions not sensitive
#                      this asymmetry (i.e. abs(Phi_q-Phi_qbar) is correct). Pointed out by
#                      Ulrich Husemann and Christoph Wasicki (14/5/2009).
#             Fix: reconstruction of transverse momenta corrected appropriately.
#             Problem: requests of explicit facility to change random seed (Lorenzo Bellagamba, 13/5/2009)
#             Fix: Flag randomseed in powheg.input can now be set to an arbitrary value.
#                  This affects the generation of POWHEG events; it may or may not affect the shower
#                  development, depending upon the Shower program being used.


tar xvf POWHEG-hvq.tar.gz

# patch 1
patch -p0 <  POWHEG-hvq-patch1

# patch 2
patch -p0 <  POWHEG-hvq-patch2
mv POWHEG-hvq/pdfdata/cteq5hq1 POWHEG-hvq/pdfdata/ctq5hq1

# patch 3
patch -p0 <  POWHEG-hvq-patch3

# patch 4
patch -p0 <  POWHEG-hvq-patch4