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jewel-2.0.2.f
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C+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
C++ Copyright (C) 2013 Korinna C. Zapp [[email protected]] ++
C++ ++
C++ This file is part of JEWEL 2.0.2 ++
C++ ++
C++ The JEWEL homepage is jewel.hepforge.org ++
C++ ++
C++ The medium model was partly implemented by Jochen Klein ++
C++ ++
C++ Please follow the MCnet GUIDELINES and cite arXiv:1311.0048 ++
C++ for the code and JHEP 1303 (2013) 080 [arXiv:1212.1599] and ++
C++ optionally EPJC C60 (2009) 617 [arXiv:0804.3568] for the ++
C++ physics. ++
C++ ++
C++ JEWEL relies heavily on PYTHIA 6 for the event generation. The ++
C++ modified version of PYTHIA 6.4.25 that is distributed with ++
C++ JEWEL is, however, not an official PYTHIA release and must not ++
C++ be used for anything else. Please refer to results as ++
C++ "JEWEL+PYTHIA". ++
C++ ++
C++ JEWEL also uses code provided by S. Zhang and J. M. Jing ++
C++ (Computation of Special Functions, John Wiley & Sons, New York, ++
C++ 1996 and http://jin.ece.illinois.edu) for computing the ++
C++ exponential integral Ei(x). ++
C++ ++
C++ ++
C++ JEWEL is free software; you can redistribute it and/or ++
C++ modify it under the terms of the GNU General Public License ++
C++ as published by the Free Software Foundation; either version 2 ++
C++ of the License, or (at your option) any later version. ++
C++ ++
C++ JEWEL is distributed in the hope that it will be useful, ++
C++ but WITHOUT ANY WARRANTY; without even the implied warranty of ++
C++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++
C++ GNU General Public License for more details. ++
C++ ++
C++ You should have received a copy of the GNU General Public ++
C++ License along with this program; if not, write to the Free ++
C++ Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, ++
C++ MA 02110-1301 USA ++
C++ ++
C++ Linking JEWEL statically or dynamically with other modules is ++
C++ making a combined work based on JEWEL. Thus, the terms and ++
C++ conditions of the GNU General Public License cover the whole ++
C++ combination. ++
C++ ++
C++ In addition, as a special exception, I give you permission to ++
C++ combine JEWEL with the code for the computation of special ++
C++ functions provided by S. Zhang and J. M. Jing. You may copy and ++
C++ distribute such a system following the terms of the GNU GPL for ++
C++ JEWEL and the licenses of the other code concerned, provided ++
C++ that you include the source code of that other code when and as ++
C++ the GNU GPL requires distribution of source code. ++
C+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
PROGRAM JEWEL
IMPLICIT NONE
C--Common block of Pythia
COMMON/PYJETS/N,NPAD,K(23000,5),P(23000,5),V(23000,5)
INTEGER N,NPAD,K
DOUBLE PRECISION P,V
COMMON/PYDAT1/MSTU(200),PARU(200),MSTJ(200),PARJ(200)
INTEGER MSTU,MSTJ
DOUBLE PRECISION PARU,PARJ
COMMON/PYDAT3/MDCY(500,3),MDME(8000,2),BRAT(8000),KFDP(8000,5)
INTEGER MDCY,MDME,KFDP
DOUBLE PRECISION BRAT
COMMON/PYSUBS/MSEL,MSELPD,MSUB(500),KFIN(2,-40:40),CKIN(200)
INTEGER MSEL,MSELPD,MSUB,KFIN
DOUBLE PRECISION CKIN
COMMON/PYPARS/MSTP(200),PARP(200),MSTI(200),PARI(200)
INTEGER MSTP,MSTI
DOUBLE PRECISION PARP,PARI
COMMON/PYDATR/MRPY(6),RRPY(100)
INTEGER MRPY
DOUBLE PRECISION RRPY
C--identifier of file for hepmc output and logfile
common/hepmcid/hpmcfid,logfid
integer hpmcfid,logfid
C--discard event flag
COMMON/DISC/NDISC,NSTRANGE,NGOOD,errcount,wdisc,DISCARD
LOGICAL DISCARD
INTEGER NDISC,NSTRANGE,NGOOD,errcount
double precision wdisc
C--event weight
COMMON/WEIGHT/EVWEIGHT,sumofweights
double precision EVWEIGHT,sumofweights
C--number of scattering events
COMMON/CHECK/NSCAT,NSCATEFF,NSPLIT
DOUBLE PRECISION NSCAT,NSCATEFF,NSPLIT
C--number of extrapolations in tables
common/extrapolations/ntotspliti,noverspliti,ntotpdf,noverpdf,
&ntotxsec,noverxsec,ntotsuda,noversuda
integer ntotspliti,noverspliti,ntotpdf,noverpdf,
&ntotxsec,noverxsec,ntotsuda,noversuda
C--local variables
integer j,nsim,init,i
double precision gettemp,r,tau
nsim=init()
C--event loop
DO 100 J=1,NSIM
call genevent(j)
100 CONTINUE
C--finish
WRITE(HPMCFID,'(A)')'HepMC::IO_GenEvent-END_EVENT_LISTING'
WRITE(HPMCFID,*)
CLOSE(HPMCFID,status='keep')
write(logfid,*)
write(logfid,*)'mean number of scatterings:',
& NSCAT/(SUMOFWEIGHTS-WDISC)
write(logfid,*)'mean number of effective scatterings:',
& NSCATEFF/(SUMOFWEIGHTS-WDISC)
write(logfid,*)'mean number of splittings:',
& NSPLIT/(SUMOFWEIGHTS-WDISC)
write(logfid,*)
write(logfid,*)'number of extrapolations in splitting integral: ',
& noverspliti,' (',(noverspliti*1.d0)/(ntotspliti*1.d0),'%)'
write(logfid,*)
& 'number of extrapolations in splitting partonic PDFs: ',
& noverpdf,' (',(noverpdf*1.d0)/(ntotpdf*1.d0),'%)'
write(logfid,*)
& 'number of extrapolations in splitting cross sections: ',
& noverxsec,' (',(noverxsec*1.d0)/(ntotxsec*1.d0),'%)'
write(logfid,*)
& 'number of extrapolations in Sudakov form factor: ',
& noversuda,' (',(noversuda*1.d0)/(ntotsuda*1.d0),'%)'
write(logfid,*)
write(logfid,*)'number of good events: ',ngood
write(logfid,*)'total number of discarded events: ',NDISC
write(logfid,*)'number of events for which conversion '//
&'to hepmc failed: ',NSTRANGE
write(logfid,*)'cross section:',PARI(1),'mb'
write(logfid,*)'sum of event weights:',sumofweights-wdisc
call printtime
close(logfid,status='keep')
END
***********************************************************************
***********************************************************************
*** END OF MAIN PROGRAM - NOW COME THE SUBROUTINES ****************
***********************************************************************
***********************************************************************
***********************************************************************
*** function init
***********************************************************************
integer function init()
implicit none
INTEGER PYCOMP
INTEGER NMXHEP
C--Common block of Pythia
COMMON/PYJETS/N,NPAD,K(23000,5),P(23000,5),V(23000,5)
INTEGER N,NPAD,K
DOUBLE PRECISION P,V
COMMON/PYDAT1/MSTU(200),PARU(200),MSTJ(200),PARJ(200)
INTEGER MSTU,MSTJ
DOUBLE PRECISION PARU,PARJ
COMMON/PYDAT3/MDCY(500,3),MDME(8000,2),BRAT(8000),KFDP(8000,5)
INTEGER MDCY,MDME,KFDP
DOUBLE PRECISION BRAT
COMMON/PYSUBS/MSEL,MSELPD,MSUB(500),KFIN(2,-40:40),CKIN(200)
INTEGER MSEL,MSELPD,MSUB,KFIN
DOUBLE PRECISION CKIN
COMMON/PYPARS/MSTP(200),PARP(200),MSTI(200),PARI(200)
INTEGER MSTP,MSTI
DOUBLE PRECISION PARP,PARI
COMMON/PYDATR/MRPY(6),RRPY(100)
INTEGER MRPY
DOUBLE PRECISION RRPY
C--use nuclear pdf?
COMMON/NPDF/MASS,NSET,EPS09,INITSTR
INTEGER NSET
DOUBLE PRECISION MASS
LOGICAL EPS09
CHARACTER*10 INITSTR
C--Parameter common block
COMMON/PARAM/Q0,LPS,LQCD,LTIME,SCALEFACM,ANGORD,SCATRECOIL,
&ALLHAD,compress,NF
INTEGER NF
DOUBLE PRECISION Q0,LQCD,LTIME,LPS,SCALEFACM
LOGICAL ANGORD,SCATRECOIL,ALLHAD,compress
C--splitting integral
COMMON/SPLITINT/SPLITIGGV(1000,1000),SPLITIQQV(1000,1000),
&SPLITIQGV(1000,1000),QVAL(1000),ZMVAL(1000),QMAX,ZMMIN,NPOINT
INTEGER NPOINT
DOUBLE PRECISION SPLITIGGV,SPLITIQQV,SPLITIQGV,
&QVAL,ZMVAL,QMAX,ZMMIN
C--pdf common block
COMMON/PDFS/QINQX(2,1000),GINQX(2,1000),QINGX(2,1000),
&GINGX(2,1000)
DOUBLE PRECISION QINQX,GINQX,QINGX,GINGX
C--cross secttion common block
COMMON/XSECS/INTQ1(1001,101),INTQ2(1001,101),
&INTG1(1001,101),INTG2(1001,101)
DOUBLE PRECISION INTQ1,INTQ2,INTG1,INTG2
C--Sudakov common block
COMMON/INSUDA/SUDAQQ(1000,2),SUDAQG(1000,2),SUDAGG(1000,2)
&,SUDAGC(1000,2)
DOUBLE PRECISION SUDAQQ,SUDAQG,SUDAGG,SUDAGC
C--exponential integral for negative arguments
COMMON/EXPINT/EIXS(3,1000),VALMAX,NVAL
INTEGER NVAL
DOUBLE PRECISION EIXS,VALMAX
C--discard event flag
COMMON/DISC/NDISC,NSTRANGE,NGOOD,errcount,wdisc,DISCARD
LOGICAL DISCARD
INTEGER NDISC,NSTRANGE,NGOOD,errcount
double precision wdisc
C--factor in front of formation times
COMMON/FTIMEFAC/FTFAC
DOUBLE PRECISION FTFAC
C--factor in front of alphas argument
COMMON/ALPHASFAC/PTFAC
DOUBLE PRECISION PTFAC
C--number of scattering events
COMMON/CHECK/NSCAT,NSCATEFF,NSPLIT
DOUBLE PRECISION NSCAT,NSCATEFF,NSPLIT
C--number of extrapolations in tables
common/extrapolations/ntotspliti,noverspliti,ntotpdf,noverpdf,
&ntotxsec,noverxsec,ntotsuda,noversuda
integer ntotspliti,noverspliti,ntotpdf,noverpdf,
&ntotxsec,noverxsec,ntotsuda,noversuda
C--event weight
COMMON/WEIGHT/EVWEIGHT,sumofweights
double precision EVWEIGHT,sumofweights
C--event weight exponent
COMMON/WEXPO/WEIGHTEX
DOUBLE PRECISION WEIGHTEX
C--identifier of file for hepmc output and logfile
common/hepmcid/hpmcfid,logfid
integer hpmcfid,logfid
C--max rapidity
common/rapmax/etamax
double precision etamax
C--memory for error message from getdeltat
common/errline/errl
integer errl
C--organisation of event record
common/evrecord/nsim,npart,offset,hadrotype,sqrts,collider,hadro,
&shorthepmc
integer nsim,npart,offset,hadrotype
double precision sqrts
character*4 collider
logical hadro,shorthepmc
C--Variables local to this program
INTEGER NJOB,PDFSET,ios,pos,i,j,jj
DOUBLE PRECISION PTMIN,PTMAX,GETLTIMEMAX,EOVEST,r,pyr
character firstchar
CHARACTER*2 SNSET
CHARACTER*80 PDFFILE,XSECFILE,FILEMED,FILESPLIT,buffer,
&label,value
CHARACTER*100 HEPMCFILE,LOGFILE,FILENAME2
CHARACTER(LEN=100) filename
LOGICAL PDFEXIST,SPLITIEXIST,XSECEXIST,WEIGHTED
HPMCFID = 4
logfid = 3
C--default settings
nsim = 10000
njob = 0
logfile = 'out.log'
hepmcfile = 'out.hepmc'
filesplit = 'splitint.dat'
pdffile = 'pdfs.dat'
xsecfile = 'xsecs.dat'
filemed = 'medium-params.dat'
nf = 3
lqcd = 0.4
q0 = 1.5
ptmin = 5.
ptmax = 350.
etamax = 3.1
collider = 'PPJJ'
sqrts = 2760
pdfset = 10042
nset = 1
mass = 208.
weighted = .true.
weightex = 5.
angord = .true.
allhad = .false.
hadro = .true.
hadrotype = 0
shorthepmc = .true.
compress = .true.
lps = lqcd
scatrecoil = .false.
if (.not.hadro) shorthepmc = .true.
SCALEFACM=1.
ptfac=1.
ftfac=1.d0
if (iargc().eq.0) then
write(*,*)'No parameter file given, '//
&'will run with default settings.'
else
call getarg(1,filename)
write(*,*)'Reading parameters from ',filename
open(unit=1,file=filename,status='old',err=110)
do 120 i=1,1000
read(1, '(A)', iostat=ios) buffer
if(ios.ne.0) goto 130
firstchar = buffer(1:1)
if (firstchar.eq.'#') goto 120
pos=scan(buffer,' ')
label=buffer(1:pos)
value=buffer(pos+1:)
if(label.eq."NEVENT")then
read(value,*,iostat=ios) nsim
elseif(label.eq."NJOB")then
read(value,*,iostat=ios) njob
elseif(label.eq."LOGFILE")then
read(value,'(a)',iostat=ios) logfile
elseif(label.eq."HEPMCFILE")then
read(value,'(a)',iostat=ios) hepmcfile
elseif(label.eq."SPLITINTFILE")then
read(value,'(a)',iostat=ios) filesplit
elseif(label.eq."PDFFILE")then
read(value,'(a)',iostat=ios) pdffile
elseif(label.eq."XSECFILE")then
read(value,'(a)',iostat=ios) xsecfile
elseif(label.eq."MEDIUMPARAMS")then
read(value,'(a)',iostat=ios) filemed
elseif(label.eq."NF")then
read(value,*,iostat=ios) nf
elseif(label.eq."LAMBDAQCD")then
read(value,*,iostat=ios) lqcd
elseif(label.eq."Q0")then
read(value,*,iostat=ios) q0
elseif(label.eq."PTMIN")then
read(value,*,iostat=ios) ptmin
elseif(label.eq."PTMAX")then
read(value,*,iostat=ios) ptmax
elseif(label.eq."ETAMAX")then
read(value,*,iostat=ios) etamax
elseif(label.eq."PROCESS")then
read(value,*,iostat=ios) collider
elseif(label.eq."SQRTS")then
read(value,*,iostat=ios) sqrts
elseif(label.eq."PDFSET")then
read(value,*,iostat=ios) pdfset
elseif(label.eq."NSET")then
read(value,*,iostat=ios) nset
elseif(label.eq."MASS")then
read(value,*,iostat=ios) mass
elseif(label.eq."WEIGHTED")then
read(value,*,iostat=ios) weighted
elseif(label.eq."WEXPO")then
read(value,*,iostat=ios) weightex
elseif(label.eq."ANGORD")then
read(value,*,iostat=ios) angord
elseif(label.eq."KEEPRECOILS")then
read(value,*,iostat=ios) allhad
elseif(label.eq."HADRO")then
read(value,*,iostat=ios) hadro
elseif(label.eq."HADROTYPE")then
read(value,*,iostat=ios) hadrotype
elseif(label.eq."SHORTHEPMC")then
read(value,*,iostat=ios) shorthepmc
elseif(label.eq."COMPRESS")then
read(value,*,iostat=ios) compress
else
write(*,*)'unknown label ',label
endif
120 continue
110 write(*,*)
& 'Unable to open parameter file, will exit the run.'
call exit(1)
130 close(1,status='keep')
write(*,*)'...done'
endif
if (ptmin.lt.3.d0) ptmin = 3.d0
OPEN(unit=logfid,file=LOGFILE,status='unknown')
MSTU(11)=logfid
call printtime
call printlogo(logfid)
write(logfid,*)
write(logfid,*)'parameters of the run:'
write(logfid,*)'NEVENT = ',nsim
write(logfid,*)'NJOB = ',njob
write(logfid,*)'LOGFILE = ',logfile
write(logfid,*)'HEPMCFILE = ',hepmcfile
write(logfid,*)'SPLITINTFILE = ',filesplit
write(logfid,*)'PDFFILE = ',pdffile
write(logfid,*)'XSECFILE = ',xsecfile
write(logfid,*)'MEDIUMPARAMS = ',filemed
write(logfid,*)'NF = ',nf
write(logfid,*)'LAMBDAQCD = ',lqcd
write(logfid,*)'Q0 = ',q0
write(logfid,*)'PTMIN = ',ptmin
write(logfid,*)'PTMAX = ',ptmax
write(logfid,*)'ETAMAX = ',etamax
write(logfid,*)'PROCESS = ',collider
write(logfid,*)'SQRTS = ',sqrts
write(logfid,*)'PDFSET = ',pdfset
write(logfid,*)'NSET = ',nset
write(logfid,*)'MASS = ',mass
write(logfid,*)'WEIGHTED = ',weighted
write(logfid,*)'WEXPO = ',weightex
write(logfid,*)'ANGORD = ',angord
write(logfid,*)'KEEPRECOILS = ',allhad
write(logfid,*)'HADRO = ',hadro
write(logfid,*)'HADROTYPE = ',hadrotype
write(logfid,*)'SHORTHEPMC = ',shorthepmc
write(logfid,*)'COMPRESS = ',compress
write(logfid,*)
call flush(logfid)
if ((collider.ne.'PPJJ').and.(collider.ne.'EEJJ')) then
write(logfid,*)'Fatal error: colliding system unknown, '//
& 'will exit now'
call exit(1)
endif
C--initialize medium
CALL MEDINIT(FILEMED,logfid,etamax)
CALL MEDNEXTEVT
OPEN(unit=HPMCFID,file=HEPMCFILE,status='unknown')
WRITE(HPMCFID,*)
WRITE(HPMCFID,'(A)')'HepMC::Version 2.06.05'
WRITE(HPMCFID,'(A)')'HepMC::IO_GenEvent-START_EVENT_LISTING'
NPART=2
if(ptmax.gt.0.)then
EOVEST=MIN(1.5*(PTMAX+50.)*COSH(ETAMAX),sqrts/2.)
else
EOVEST=sqrts/2.
endif
IF(NSET.EQ.0)THEN
EPS09=.FALSE.
ELSE
EPS09=.TRUE.
IF(NSET.LT.10)THEN
WRITE(SNSET,'(i1)') NSET
ELSE
WRITE(SNSET,'(i2)') NSET
ENDIF
INITSTR='EPS09LO,'//SNSET
ENDIF
C--initialise PYTHIA
C--no multiple interactions
MSTP(81) = 0
C--switch off final state radiation
MSTP(71)=0
C--No hadronisation
MSTP(111)=0
C--Min shat in simulation
CKIN(1)=2.
C--pT-cut
CKIN(3)=PTMIN
CKIN(4)=PTMAX
C--use LHAPDF
MSTP(52)=2
C--choose pdf: CTEQ6ll (LO fit/LO alphas) - 10042
C MSTW2008 (LO central) - 21000
MSTP(51)=PDFSET
C--All QCD processes are active
MSEL=1
C--weighted events
IF(WEIGHTED) MSTP(142)=1
C--number of errors to be printed
MSTU(22)=MAX(10,INT(5.*NSIM/100.))
C--number of lines in event record
MSTU(4)=23000
MSTU(5)=23000
C--switch off pi0 decay
MDCY(PYCOMP(111),1)=0
C--initialisation call
IF(COLLIDER.EQ.'EEJJ')THEN
OFFSET=9
CALL PYINIT('CMS','e+','e-',sqrts)
ELSE
OFFSET=8
CALL PYINIT('CMS','p','p',sqrts)
ENDIF
CALL EIXINT
CALL INSUDAINT(EOVEST)
write(logfid,*)
INQUIRE(file=FILESPLIT,exist=SPLITIEXIST)
IF(SPLITIEXIST)THEN
write(logfid,*)'read splitting integrals from ',FILESPLIT
OPEN(unit=10,file=FILESPLIT,status='old')
READ(10,*)QMAX,ZMMIN,NPOINT
DO 893 I=1,NPOINT+1
READ(10,*) QVAL(I),ZMVAL(I)
893 CONTINUE
DO 891 I=1,NPOINT+1
DO 892 J=1,NPOINT+1
READ(10,*)SPLITIGGV(I,J),SPLITIQQV(I,J),SPLITIQGV(I,J)
892 CONTINUE
891 CONTINUE
CLOSE(10,status='keep')
ELSE
write(logfid,*)'have to integrate splitting functions, '//
&'this may take some time'
CALL SPLITFNCINT(EOVEST)
INQUIRE(file=FILESPLIT,exist=SPLITIEXIST)
IF(.NOT.SPLITIEXIST)THEN
write(logfid,*)'write splitting integrals to ',FILESPLIT
OPEN(unit=10,file=FILESPLIT,status='new')
WRITE(10,*)QMAX,ZMMIN,NPOINT
DO 896 I=1,NPOINT+1
WRITE(10,*) QVAL(I),ZMVAL(I)
896 CONTINUE
DO 897 I=1,NPOINT+1
DO 898 J=1,NPOINT+1
WRITE(10,*)SPLITIGGV(I,J),SPLITIQQV(I,J),SPLITIQGV(I,J)
898 CONTINUE
897 CONTINUE
CLOSE(10,status='keep')
ENDIF
ENDIF
write(logfid,*)
INQUIRE(file=PDFFILE,exist=PDFEXIST)
IF(PDFEXIST)THEN
write(logfid,*)'read pdfs from ',PDFFILE
OPEN(unit=10,file=PDFFILE,status='old')
DO 872 I=1,2
DO 873 J=1,1000
READ(10,*)QINQX(I,J),GINQX(I,J),QINGX(I,J),GINGX(I,J)
873 CONTINUE
872 CONTINUE
CLOSE(10,status='keep')
ELSE
write(logfid,*)'have to integrate pdfs, this may take some time'
CALL PDFINT(EOVEST)
INQUIRE(file=PDFFILE,exist=PDFEXIST)
IF(.NOT.PDFEXIST)THEN
write(logfid,*)'write pdfs to ',PDFFILE
OPEN(unit=10,file=PDFFILE,status='new')
DO 876 I=1,2
DO 877 J=1,1000
WRITE(10,*)QINQX(I,J),GINQX(I,J),QINGX(I,J),GINGX(I,J)
877 CONTINUE
876 CONTINUE
CLOSE(10,status='keep')
ENDIF
ENDIF
write(logfid,*)
INQUIRE(file=XSECFILE,exist=XSECEXIST)
IF(XSECEXIST)THEN
write(logfid,*)'read cross sections from ',XSECFILE
OPEN(unit=10,file=XSECFILE,status='old')
DO 881 J=1,1001
DO 885 JJ=1,101
READ(10,*)INTQ1(J,JJ),INTQ2(J,JJ),
&INTG1(J,JJ),INTG2(J,JJ)
885 CONTINUE
881 CONTINUE
CLOSE(10,status='keep')
ELSE
write(logfid,*)'have to integrate cross sections, '//
&'this may take some time'
CALL XSECINT(EOVEST)
INQUIRE(file=XSECFILE,exist=XSECEXIST)
IF(.NOT.XSECEXIST)THEN
write(logfid,*)'write cross sections to ',XSECFILE
OPEN(unit=10,file=XSECFILE,status='new')
DO 883 J=1,1001
DO 884 JJ=1,101
WRITE(10,*)INTQ1(J,JJ),INTQ2(J,JJ),
&INTG1(J,JJ),INTG2(J,JJ)
884 CONTINUE
883 CONTINUE
CLOSE(10,status='keep')
ENDIF
ENDIF
write(logfid,*)
CALL FLUSH(3)
C--initialise random number generator status
IF(NJOB.GT.0)THEN
MRPY(1)=NJOB*1000
MRPY(2)=0
ENDIF
C--Call PYR once for initialization
R=PYR(0)
WDISC=0.d0
NDISC=0
NGOOD=0
NSTRANGE=0
ERRCOUNT=0
errl = 0
SUMOFWEIGHTS=0.d0
NSCAT=0.d0
NSCATEFF=0.d0
NSPLIT=0.d0
ntotspliti=0
noverspliti=0
ntotpdf=0
noverpdf=0
ntotxsec=0
noverxsec=0
ntotsuda=0
noversuda=0
init=nsim
end
***********************************************************************
*** subroutine genevent
***********************************************************************
subroutine genevent(j)
implicit none
C--identifier of file for hepmc output and logfile
common/hepmcid/hpmcfid,logfid
integer hpmcfid,logfid
INTEGER PYCOMP
INTEGER NMXHEP
C--Common block of Pythia
COMMON/PYJETS/N,NPAD,K(23000,5),P(23000,5),V(23000,5)
INTEGER N,NPAD,K
DOUBLE PRECISION P,V
COMMON/PYDAT1/MSTU(200),PARU(200),MSTJ(200),PARJ(200)
INTEGER MSTU,MSTJ
DOUBLE PRECISION PARU,PARJ
COMMON/PYDAT3/MDCY(500,3),MDME(8000,2),BRAT(8000),KFDP(8000,5)
INTEGER MDCY,MDME,KFDP
DOUBLE PRECISION BRAT
COMMON/PYSUBS/MSEL,MSELPD,MSUB(500),KFIN(2,-40:40),CKIN(200)
INTEGER MSEL,MSELPD,MSUB,KFIN
DOUBLE PRECISION CKIN
COMMON/PYPARS/MSTP(200),PARP(200),MSTI(200),PARI(200)
INTEGER MSTP,MSTI
DOUBLE PRECISION PARP,PARI
COMMON/PYDATR/MRPY(6),RRPY(100)
INTEGER MRPY
DOUBLE PRECISION RRPY
C--Parameter common block
COMMON/PARAM/Q0,LPS,LQCD,LTIME,SCALEFACM,ANGORD,SCATRECOIL,
&ALLHAD,compress,NF
INTEGER NF
DOUBLE PRECISION Q0,LQCD,LTIME,LPS,SCALEFACM
LOGICAL ANGORD,SCATRECOIL,ALLHAD,compress
C--discard event flag
COMMON/DISC/NDISC,NSTRANGE,NGOOD,errcount,wdisc,DISCARD
LOGICAL DISCARD
INTEGER NDISC,NSTRANGE,NGOOD,errcount
double precision wdisc
C--variables for angular ordering
COMMON/ANGOR/ZA(23000),ZD(23000),THETAA(23000),QQBARD(23000)
DOUBLE PRECISION ZA,ZD,THETAA
LOGICAL QQBARD
C--factor in front of formation times
COMMON/FTIMEFAC/FTFAC
DOUBLE PRECISION FTFAC
C--time common block
COMMON/TIME/MV(23000,5)
DOUBLE PRECISION MV
C--colour index common block
COMMON/COLOUR/TRIP(23000),ANTI(23000),COLMAX
INTEGER TRIP,ANTI,COLMAX
C--number of scattering events
COMMON/CHECK/NSCAT,NSCATEFF,NSPLIT
DOUBLE PRECISION NSCAT,NSCATEFF,NSPLIT
C--event weight
COMMON/WEIGHT/EVWEIGHT,sumofweights
double precision EVWEIGHT,sumofweights
C--event weight exponent
COMMON/WEXPO/WEIGHTEX
DOUBLE PRECISION WEIGHTEX
C--max rapidity
common/rapmax/etamax
double precision etamax
C--organisation of event record
common/evrecord/nsim,npart,offset,hadrotype,sqrts,collider,hadro,
&shorthepmc
integer nsim,npart,offset,hadrotype
double precision sqrts
character*4 collider
logical hadro,shorthepmc
C--Variables local to this program
INTEGER NOLD,PID,IPART,LME1,LME2,j,i
DOUBLE PRECISION PYR,ENI,QMAX1,R,GETMASS,PYP,Q1,Q2,P21,P22,ETOT,
&QMAX2,POLD,EN1,EN2,BETA(3),ENEW1,ENEW2,emax,lambda,x0,y0,x1,x2,x3,
&MEWEIGHT,PSWEIGHT,WEIGHT,EPS1,EPS2,THETA1,THETA2,Z1,Z2,getltimemax
CHARACTER*2 TYPE1,TYPE2
LOGICAL FIRSTTRIP,WHICH1,WHICH2,ISDIQUARK
N=0
COLMAX=600
DISCARD=.FALSE.
DO 91 I=1,23000
MV(I,1)=0.d0
MV(I,2)=0.d0
MV(I,3)=0.d0
MV(I,4)=0.d0
MV(I,5)=0.d0
91 CONTINUE
CALL MEDNEXTEVT
C--initialisation with matrix element
C--production vertex
CALL PICKVTX(X0,Y0)
LTIME=GETLTIMEMAX()
99 CALL PYEVNT
NPART=N-OFFSET
EVWEIGHT=PARI(10)
SUMOFWEIGHTS=SUMOFWEIGHTS+EVWEIGHT
IF((COLLIDER.EQ.'EEJJ').AND.(ABS(K(8,2)).GT.6))THEN
WDISC=WDISC+EVWEIGHT
NDISC=NDISC+1
GOTO 102
ELSE
NGOOD=NGOOD+1
ENDIF
C--prepare event record
DO 180 IPART=OFFSET+1, OFFSET+NPART
IF(K(IPART,3).EQ.(OFFSET-1))THEN
LME1=IPART
IF(K(IPART,2).EQ.21)THEN
TYPE1='GC'
ELSE
TYPE1='QQ'
ENDIF
ELSEIF(K(IPART,3).EQ.OFFSET)THEN
LME2=IPART
IF(K(IPART,2).EQ.21)THEN
TYPE2='GC'
ELSE
TYPE2='QQ'
ENDIF
ELSE
TRIP(IPART)=0
ANTI(IPART)=0
ZD(IPART)=0.d0
THETAA(IPART)=0.d0
ENDIF
C--assign colour indices
IF(K(IPART,1).EQ.2)THEN
IF(K(IPART-1,1).EQ.2)THEN
C--in middle of colour singlet
IF(FIRSTTRIP)THEN
TRIP(IPART)=COLMAX+1
ANTI(IPART)=TRIP(IPART-1)
ELSE
TRIP(IPART)=ANTI(IPART-1)
ANTI(IPART)=COLMAX+1
ENDIF
COLMAX=COLMAX+1
ELSE
C--beginning of colour singlet
IF(((ABS(K(IPART,2)).LT.10).AND.(K(IPART,2).GT.0))
& .OR.(ISDIQUARK(K(IPART,2)).AND.(K(IPART,2).LT.0)))THEN
TRIP(IPART)=COLMAX+1
ANTI(IPART)=0
FIRSTTRIP=.TRUE.
ELSE
TRIP(IPART)=0
ANTI(IPART)=COLMAX+1
FIRSTTRIP=.FALSE.
ENDIF
COLMAX=COLMAX+1
ENDIF
ENDIF
IF(K(IPART,1).EQ.1)THEN
C--end of colour singlet
IF(FIRSTTRIP)THEN
TRIP(IPART)=0
ANTI(IPART)=TRIP(IPART-1)
ELSE
TRIP(IPART)=ANTI(IPART-1)
ANTI(IPART)=0
ENDIF
ENDIF
180 CONTINUE
K(LME1,1)=1
K(LME2,1)=1
PID=K(LME1,2)
ENI=MAX(P(LME1,4),P(LME2,4))
DO 183 IPART=OFFSET+1, OFFSET+NPART
IF((IPART.NE.LME1).AND.(IPART.NE.LME2).AND.(K(IPART,1).LT.11))
& K(IPART,1)=4
183 CONTINUE
C--find virtualities and adapt four-vectors
IF(COLLIDER.EQ.'PPJJ')THEN
QMAX1=PYP(LME1,10)
QMAX2=PYP(LME2,10)
EMAX=P(LME1,4)+P(LME2,4)
THETA1=-1.d0
THETA2=-1.d0
ENDIF
EN1=P(LME1,4)
EN2=P(LME2,4)
BETA(1)=(P(LME1,1)+P(LME2,1))/(P(LME1,4)+P(LME2,4))
BETA(2)=(P(LME1,2)+P(LME2,2))/(P(LME1,4)+P(LME2,4))
BETA(3)=(P(LME1,3)+P(LME2,3))/(P(LME1,4)+P(LME2,4))
CALL PYROBO(LME1,LME1,0d0,0d0,-BETA(1),-BETA(2),-BETA(3))
CALL PYROBO(LME2,LME2,0d0,0d0,-BETA(1),-BETA(2),-BETA(3))
ETOT=P(LME1,4)+P(LME2,4)
IF(COLLIDER.EQ.'EEJJ')THEN
QMAX1=ETOT
QMAX2=ETOT
EMAX=P(LME1,4)+P(LME2,4)
THETA1=-1.d0
THETA2=-1.d0
ENDIF
C--find virtuality
Q1=GETMASS(0.d0,QMAX1,THETA1,EMAX,TYPE1,EMAX,.FALSE.,
& Z1,WHICH1)
Q2=GETMASS(0.d0,QMAX2,THETA2,EMAX,TYPE2,EMAX,.FALSE.,
& Z2,WHICH2)
182 ENEW1=ETOT/2.d0 + (Q1**2-Q2**2)/(2.*ETOT)
ENEW2=ETOT/2.d0 - (Q1**2-Q2**2)/(2.*ETOT)
P21 = (ETOT/2.d0 + (Q1**2-Q2**2)/(2.*ETOT))**2 - Q1**2
P22 = (ETOT/2.d0 - (Q1**2-Q2**2)/(2.*ETOT))**2 - Q2**2
WEIGHT=1.d0
IF((PYR(0).GT.WEIGHT).OR.(P21.LT.0.d0).OR.(P22.LT.0.d0)
& .OR.(ENEW1.LT.0.d0).OR.(ENEW2.LT.0.d0)
& )THEN
IF(Q1.GT.Q2)THEN
Q1=GETMASS(0.d0,Q1,THETA1,EMAX,TYPE1,EMAX,.FALSE.,
& Z1,WHICH1)
ELSE
Q2=GETMASS(0.d0,Q2,THETA2,EMAX,TYPE2,EMAX,.FALSE.,
& Z2,WHICH2)
ENDIF
GOTO 182
ENDIF
POLD=PYP(LME1,8)
P(LME1,1)=P(LME1,1)*SQRT(P21)/POLD
P(LME1,2)=P(LME1,2)*SQRT(P21)/POLD
P(LME1,3)=P(LME1,3)*SQRT(P21)/POLD
P(LME1,4)=ENEW1
P(LME1,5)=Q1
POLD=PYP(LME2,8)
P(LME2,1)=P(LME2,1)*SQRT(P22)/POLD
P(LME2,2)=P(LME2,2)*SQRT(P22)/POLD
P(LME2,3)=P(LME2,3)*SQRT(P22)/POLD
P(LME2,4)=ENEW2
P(LME2,5)=Q2
CALL PYROBO(LME1,LME1,0d0,0d0,BETA(1),BETA(2),BETA(3))
CALL PYROBO(LME2,LME2,0d0,0d0,BETA(1),BETA(2),BETA(3))
C--correct for overestimated energy
IF(Q1.GT.0.d0)THEN
EPS1=0.5-0.5*SQRT(1.-Q0**2/Q1**2)
& *SQRT(1.-Q1**2/P(LME1,4)**2)
IF((Z1.LT.EPS1).OR.(Z1.GT.(1.-EPS1)))THEN
Q1=GETMASS(0.d0,Q1,THETA1,EMAX,TYPE1,EMAX,.FALSE.,
& Z1,WHICH1)
CALL PYROBO(LME1,LME1,0d0,0d0,-BETA(1),-BETA(2),-BETA(3))
CALL PYROBO(LME2,LME2,0d0,0d0,-BETA(1),-BETA(2),-BETA(3))
GOTO 182
ENDIF
ENDIF
IF(Q2.GT.0.d0)THEN
EPS2=0.5-0.5*SQRT(1.-Q0**2/Q2**2)
& *SQRT(1.-Q2**2/P(LME2,4)**2)
IF((Z2.LT.EPS2).OR.(Z2.GT.(1.-EPS2)))THEN
Q2=GETMASS(0.d0,Q2,THETA2,EMAX,TYPE2,EMAX,.FALSE.,
& Z2,WHICH2)
CALL PYROBO(LME1,LME1,0d0,0d0,-BETA(1),-BETA(2),-BETA(3))
CALL PYROBO(LME2,LME2,0d0,0d0,-BETA(1),-BETA(2),-BETA(3))
GOTO 182
ENDIF
ENDIF
C--correct to ME for first parton
IF(COLLIDER.EQ.'EEJJ')THEN
BETA(1)=(P(LME1,1)+P(LME2,1))/(P(LME1,4)+P(LME2,4))
BETA(2)=(P(LME1,2)+P(LME2,2))/(P(LME1,4)+P(LME2,4))
BETA(3)=(P(LME1,3)+P(LME2,3))/(P(LME1,4)+P(LME2,4))
CALL PYROBO(LME1,LME1,0d0,0d0,-BETA(1),-BETA(2),-BETA(3))
CALL PYROBO(LME2,LME2,0d0,0d0,-BETA(1),-BETA(2),-BETA(3))
IF(Q1.GT.0.d0)THEN
C--generate z value
X1=Z1*(ETOT**2+Q1**2)/ETOT**2
X2=(ETOT**2-Q1**2)/ETOT**2
X3=(1.-Z1)*(ETOT**2+Q1**2)/ETOT**2
PSWEIGHT=(1.-X1)*(1.+(X1/(2.-X2))**2)/X3
& + (1.-X2)*(1.+(X2/(2.-X1))**2)/X3
MEWEIGHT=X1**2+X2**2
WEIGHT=MEWEIGHT/PSWEIGHT
IF(PYR(0).GT.WEIGHT)THEN
184 Q1=GETMASS(0.d0,Q1,THETA1,EMAX,TYPE1,EMAX,.FALSE.,
& Z1,WHICH1)
ENDIF
ENDIF
C--correct to ME for second parton
IF(Q2.GT.0.d0)THEN
C--generate z value
X1=(ETOT**2-Q2**2)/ETOT**2
X2=Z2*(ETOT**2+Q2**2)/ETOT**2
X3=(1.-Z2)*(ETOT**2+Q2**2)/ETOT**2
PSWEIGHT=(1.-X1)*(1.+(X1/(2.-X2))**2)/X3
& + (1.-X2)*(1.+(X2/(2.-X1))**2)/X3
MEWEIGHT=X1**2+X2**2
WEIGHT=MEWEIGHT/PSWEIGHT
IF(PYR(0).GT.WEIGHT)THEN
185 Q2=GETMASS(0.d0,Q2,THETA2,EMAX,TYPE2,EMAX,.FALSE.,
& Z2,WHICH2)
ENDIF
ENDIF
186 ENEW1=ETOT/2.d0 + (Q1**2-Q2**2)/(2.*ETOT)
ENEW2=ETOT/2.d0 - (Q1**2-Q2**2)/(2.*ETOT)
P21 = (ETOT/2.d0 + (Q1**2-Q2**2)/(2.*ETOT))**2 - Q1**2
P22 = (ETOT/2.d0 - (Q1**2-Q2**2)/(2.*ETOT))**2 - Q2**2
POLD=PYP(LME1,8)
P(LME1,1)=P(LME1,1)*SQRT(P21)/POLD
P(LME1,2)=P(LME1,2)*SQRT(P21)/POLD
P(LME1,3)=P(LME1,3)*SQRT(P21)/POLD
P(LME1,4)=ENEW1
P(LME1,5)=Q1
POLD=PYP(LME2,8)
P(LME2,1)=P(LME2,1)*SQRT(P22)/POLD
P(LME2,2)=P(LME2,2)*SQRT(P22)/POLD
P(LME2,3)=P(LME2,3)*SQRT(P22)/POLD
P(LME2,4)=ENEW2
P(LME2,5)=Q2
CALL PYROBO(LME1,LME1,0d0,0d0,BETA(1),BETA(2),BETA(3))
CALL PYROBO(LME2,LME2,0d0,0d0,BETA(1),BETA(2),BETA(3))
C--correct for overestimated energy
IF(Q1.GT.0.d0)THEN
EPS1=0.5-0.5*SQRT(1.-Q0**2/Q1**2)
& *SQRT(1.-Q1**2/P(LME1,4)**2)
IF((Z1.LT.EPS1).OR.(Z1.GT.(1.-EPS1)))THEN
Q1=GETMASS(0.d0,Q1,THETA1,EMAX,TYPE1,EMAX,.FALSE.,
& Z1,WHICH1)
CALL PYROBO(LME1,LME1,0d0,0d0,-BETA(1),-BETA(2),-BETA(3))
CALL PYROBO(LME2,LME2,0d0,0d0,-BETA(1),-BETA(2),-BETA(3))
GOTO 186
ENDIF
ENDIF
IF(Q2.GT.0.d0)THEN
EPS2=0.5-0.5*SQRT(1.-Q0**2/Q2**2)
& *SQRT(1.-Q2**2/P(LME2,4)**2)
IF((Z2.LT.EPS2).OR.(Z2.GT.(1.-EPS2)))THEN
Q2=GETMASS(0.d0,Q2,THETA2,EMAX,TYPE2,EMAX,.FALSE.,
& Z2,WHICH2)
CALL PYROBO(LME1,LME1,0d0,0d0,-BETA(1),-BETA(2),-BETA(3))
CALL PYROBO(LME2,LME2,0d0,0d0,-BETA(1),-BETA(2),-BETA(3))
GOTO 186
ENDIF
ENDIF
ENDIF
ZA(LME1)=1.d0
ZA(LME2)=1.d0
THETAA(LME1)=P(LME1,5)/(SQRT(Z1*(1.-Z1))*P(LME1,4))
THETAA(LME2)=P(LME2,5)/(SQRT(Z2*(1.-Z2))*P(LME2,4))
ZD(LME1)=Z1
ZD(LME2)=Z2
QQBARD(LME1)=WHICH1
QQBARD(LME2)=WHICH2
MV(LME1,1)=X0
MV(LME1,2)=Y0
MV(LME1,3)=0.d0
MV(LME1,4)=0.d0
IF(P(LME1,5).GT.0.d0)THEN
LAMBDA=1.d0/(FTFAC*P(LME1,4)*0.2/Q1**2)
MV(LME1,5)=-LOG(1.d0-PYR(0))/LAMBDA