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c 15.02.2004 Link routines between SIBYLL2.1 and EPOS.
c author T. Pierog
c-----------------------------------------------------------------------
subroutine IniSibyll
c-----------------------------------------------------------------------
c Primary initialization for Sibyll
c-----------------------------------------------------------------------
include 'epos.inc'
COMMON /S_DEBUG/ Ncall, Ndebug
COMMON /S_CSYDEC/ CBR(102), KDEC(612), LBARP(49), IDB(49)
call utpri('inisib',ish,ishini,6)
write(ifmt,'(a,i6)')'initialize Sibyll ...'
Ndebug=0
if(ish.ge.3)Ndebug=ish-2
C... SIBYLL initialization
CALL SIBYLL_INI
C...Cross sections for nucleus-nucleus and hadron nucleus
CALL NUC_NUC_INI
C...define all particles as unstable
do i=1,49
IDB(i) = abs(IDB(i)) ! >0 means unstable
enddo
egymin=10.1
egymax=1e7
irescl=0
call utprix('inisib',ish,ishini,6)
end
c-----------------------------------------------------------------------
subroutine IniEvtSib
c-----------------------------------------------------------------------
c Initialization for each type of event (for given proj, targ and egy)
c-----------------------------------------------------------------------
include 'epos.inc'
COMMON /S_CSYDEC/ CBR(102), KDEC(612), LBARP(49), IDB(49)
common/geom/rmproj,rmtarg,bmax,bkmx
if(matarg.gt.18.or.maproj.gt.64)
& call utstop('Mass too big for Sibyll (Mtrg<18, Mprj<64) !&')
id=idtrafo('nxs','sib',idproj)
ida=abs(id)
if(ida.lt.6.or.ida.gt.14)
& call utstop('projectile no allowed in Sibyll !&')
if(idtarg.ne.0.and.idtarg.ne.1120)
& call utstop('target no allowed in Sibyll !&')
if(bminim.gt.0.or.bmaxim.lt.1000)
& write(ifmt,*)'Only min bias event in Sibyll ... no b !'
call iclass(idproj,iclpro)
bminim=0.
bmaxim=10000.
bmax=10.+maproj+matarg
sibincs=fsibcrse(engy,maproj,matarg)
if(engy.lt.egymin)sibincs=0. !below egymin, no interaction
call xsigma
c Epos syntax to allow (or not) particle decay in Sibyll
c (part taken from epos-dky: hdecas)
if(idecay.eq.1.and.ctaumin.le.0.)then
if(ndecay.eq.1.or.mod(ndecay/10,10).eq.1)then !Kshort, Klong
IDB(11) = -abs(IDB(11)) ! <0 means stable
IDB(12) = -abs(IDB(12))
endif
if(ndecay.eq.1.or.mod(ndecay/100,10).eq.1)then !Lambda
IDB(39) = -abs(IDB(39))
endif
if(ndecay.eq.1.or.mod(ndecay/1000,10).eq.1)then !sigma+
IDB(34) = -abs(IDB(34))
endif
if(ndecay.eq.1.or.mod(ndecay/1000,10).eq.1)then !sigma-
IDB(36) = -abs(IDB(36))
endif
if(ndecay.eq.1.or.mod(ndecay/10000,10).eq.1)then !Xi+/-
IDB(38) = -abs(IDB(38))
endif
if(ndecay.eq.1.or.mod(ndecay/10000,10).eq.1)then !Xi0
IDB(37) = -abs(IDB(37))
endif
if(ndecay.eq.1.or.mod(ndecay/100000 ,10).eq.1)then !omega
IDB(49) = -abs(IDB(49))
endif
if(ndecay.eq.1.or.mod(ndecay/1000000,10).eq.1)then !pi0
IDB(6) = -abs(IDB(6))
endif
if(nrnody.gt.0)then !all other particle
do nod=1,nrnody
idd=abs(idtrafo('nxs','sib',nody(nod)))
if(idd.lt.50)IDB(idd) = -abs(IDB(idd))
enddo
endif
else
C...define all particles as stable
do i=1,49
IDB(i) = -abs(IDB(i)) ! <0 means stable
enddo
endif
if(ish.ge.2)write(ifch,*)
& 'Sibyll used with (E,proj,maproj,matarg)',engy,id,maproj
& ,matarg
return
end
c-----------------------------------------------------------------------
subroutine emssib(iret)
c-----------------------------------------------------------------------
c call Sibyll to simulate interaction
c-----------------------------------------------------------------------
include 'epos.inc'
common/geom/rmproj,rmtarg,bmax,bkmx
C SIBYLL
COMMON /S_PLIST/ P(8000,5), LLIST(8000), NP
COMMON /S_PLNUC/ PA(5,40000), LLA(40000), NPA
PARAMETER (NW_max = 20)
PARAMETER (NS_max = 20, NH_max = 50)
PARAMETER (NJ_max = (NS_max+NH_max)*NW_max)
COMMON /S_CHIST/ X1J(NJ_max),X2J(NJ_max),
& X1JSUM(NW_max),X2JSUM(NW_max),PTJET(NJ_max),PHIJET(NJ_max),
& NNPJET(NJ_max),NNPSTR(2*NW_max),NNSOF(NW_max),NNJET(NW_max),
& JDIF(NW_max),NW,NJET,NSOF
iret=0
b1=bminim
b2=min(bmax,bmaxim)
a=pi*(b2**2-b1**2)
if(a.gt.0..and.rangen().gt.sibincs/10./a)goto 1001 !no interaction
if(ish.ge.3)call alist('Determine Sibyll Production&',0,0)
nptl=0
NP=0
NPA=0
nevt=1
kolevt=-1
koievt=-1
kohevt=-1
npjevt=maproj
ntgevt=matarg
pmxevt=pnll
egyevt=engy
bimevt=0.
bimp=0.
phievt=0.
phi=0.
anintine=anintine+1.
ns=0 !number of projectile spectators
npps=0
npns=0
call conre
call conwr
itrg=matarg
if(idtargin.eq.0)itrg=0
if(maproj.eq.1)then !hadronic projectile
L0=idtrafo('nxs','sib',idproj)
CALL SIBYLL (L0, itrg, engy)
CALL DECSIB
if(ish.ge.5)write(ifch,'(a,i5)')
$ ' number of particles from Sibyll :',NP
c save interaction type
if(JDIF(1).eq.0)then
typevt=1 !ND
elseif(JDIF(1).eq.3)then
typevt=2 !DD
else
typevt=4 !SD
endif
do k=1,NP
c LLIST is the code of final particle, P - its 4-momentum and mass.
ic=LLIST(k)
if(ish.ge.7)write(ifch,'(a,i5,a,i5,2a,4(e10.4,1x))')
$ ' Sibyll particle ',k,' id :',ic,' before conversion'
$ , ' momentum :',(P(k,i),i=1,5)
nptl=nptl+1
if(nptl.gt.mxptl)call utstop('Sibyll: mxptl too small&')
if(abs(ic).ge.10000)then
ic=ic-sign(10000,ic)
istptl(nptl)=1
else
istptl(nptl)=0
endif
id=idtrafo('sib','nxs',ic)
if(ish.ge.7)write(ifch,'(a,i5,a,i5,a)')
$ ' epos particle ',nptl,' id :',id,' after conversion'
pptl(1,nptl)=P(k,1) !P_x
pptl(2,nptl)=P(k,2) !P_y
pptl(3,nptl)=P(k,3) !P_z
pptl(4,nptl)=abs(P(k,4)) !E
pptl(5,nptl)=P(k,5) !mass
ityptl(nptl)=0
iorptl(nptl)=1
jorptl(nptl)=maproj+matarg
ifrptl(1,nptl)=0
ifrptl(2,nptl)=0
xorptl(1,nptl)=0.
xorptl(2,nptl)=0.
xorptl(3,nptl)=0.
xorptl(4,nptl)=0.
tivptl(1,nptl)=0.
tivptl(2,nptl)=0.
idptl(nptl)=id
if(ish.ge.5)write(ifch,'(a,i5,a,i5,a,4(e10.4,1x),f6.3)')
$ ' particle from Sibyll ',nptl,' id :',idptl(nptl)
$ , ' momentum :',(pptl(i,nptl),i=1,5)
enddo
if(NW.lt.matarg)then
ntgevt=NW
do is=maproj+1+NW,maproj+matarg !make the ns last target nucleon final
iorptl(is)=0
istptl(is)=0
enddo
endif
else !for nucleus projectile
nbar=0
IAP = maproj
CALL SIBNUC (IAP, itrg, engy)
if(ish.ge.5)write(ifch,'(a,i5)')
$ ' number of particles from Sibyll :',NPA
do 100 k=1,NPA
c LLIST is the code of final particle, P - its 4-momentum and mass.
ic=LLA(k)
if(ish.ge.7)write(ifch,'(a,i5,a,i5,2a,4(e10.4,1x))')
$ ' Sibyll particle ',k,' id :',ic,' before conversion'
$ , ' momentum :',(PA(i,k),i=1,5)
nNuc=0
if(ic.ge.1001) then !count spectators
nNuc=ic-1000
if(infragm.le.1
& .or.PA(4,k).lt.0.5*egymin)then !nuclear interaction only above min energy, otherwise : fragmentation
ns=ns+nNuc
goto 100
elseif(ic.eq.1001)then
if(drangen(dummy).lt.0.45d0) then
ic = 13
npps=npps+1
else
ic = 14
npns=npns+1
endif
nNuc=0
else
ptm=sqrt(PA(1,k)*PA(1,k)+PA(2,k)*PA(2,k)+PA(5,k)*PA(5,k))
PA(4,k)=PA(4,k)*float(nNuc) !energy by nucleon
PA(3,k)=sign(sqrt((PA(4,k)+ptm)*(PA(4,k)-ptm)),PA(3,k))
npps=npps+nNuc/2
npns=npns+nNuc-nNuc/2
endif
endif
nptl=nptl+1
if(nptl.gt.mxptl)call utstop('Sibyll: mxptl too small&')
id=idtrafo('sib','nxs',ic)
if(ish.ge.7)write(ifch,'(a,i5,a,i10,a)')
$ ' epos particle ',nptl,' id :',id,' after conversion'
nbar=nbar+nNuc
if(abs(id).gt.1000.and.nNuc.eq.0)nbar=nbar+sign(1,id)
pptl(1,nptl)=PA(1,k) !P_x
pptl(2,nptl)=PA(2,k) !P_y
pptl(3,nptl)=PA(3,k) !P_z
pptl(4,nptl)=PA(4,k) !E
pptl(5,nptl)=PA(5,k) !mass
istptl(nptl)=0
ityptl(nptl)=0
iorptl(nptl)=1
jorptl(nptl)=maproj+matarg
ifrptl(1,nptl)=0
ifrptl(2,nptl)=0
xorptl(1,nptl)=0.
xorptl(2,nptl)=0.
xorptl(3,nptl)=0.
xorptl(4,nptl)=0.
tivptl(1,nptl)=0.
tivptl(2,nptl)=0.
idptl(nptl)=id
if(ish.ge.5)write(ifch,'(a,i5,a,i10,a,4(e10.4,1x),f6.3)')
$ ' particle from Sibyll ',nptl,' id :',idptl(nptl)
$ , ' momentum :',(pptl(i,nptl),i=1,5)
100 continue
ntw=nbar-(maproj-ns)
nsf=0
if(ntw.lt.matarg)then
ntgevt=ntw
do is=maproj+1+ntw,maproj+matarg !make the nts last target nucleon final (not wounded)
iorptl(is)=0
istptl(is)=0
enddo
else
nsf=maproj+matarg-nbar
endif
if(ish.ge.5)write(ifch,'(a,i3,a,i3,a,i2,a)')
$ ' target spectators :',matarg-ntw
$ ,' projectile spectators (ns) :',nsf,' (',ns,')'
if((infragm.le.1.or.ns.gt.0).and.nsf.le.maproj)then
if(infragm.eq.2)ns=ns-nsf
if(infragm.eq.1.and.ns.gt.0)then
c remaining nucleus is one fragment
nptl=nptl+1
istptl(nptl)=0
pptl(1,nptl)=0.d0
pptl(2,nptl)=0.d0
pptl(4,nptl)=0.d0
inucl=0
do is=1,ns
inucl=inucl+1
pptl(4,nptl)=pptl(4,nptl)+pptl(4,is)
enddo
iprot= int(dble(inucl) / 2.15d0 + 0.7d0)
idnucl=1000000000+iprot*10000+inucl*10 !code for nuclei
npps=npps+iprot
npns=npns+inucl-iprot
call idmass(idnucl,am)
pptl(5,nptl)=am !mass
ptot=(pptl(4,nptl)+am)*(pptl(4,nptl)-am)
pptl(3,nptl)=sqrt(ptot)
ityptl(nptl)=0
istptl(nptl)=0
iorptl(nptl)=1
jorptl(nptl)=maproj
ifrptl(1,nptl)=0
ifrptl(2,nptl)=0
xorptl(1,nptl)=xorptl(1,1)
xorptl(2,nptl)=xorptl(2,1)
xorptl(3,nptl)=xorptl(3,1)
xorptl(4,nptl)=xorptl(4,1)
tivptl(1,nptl)=tivptl(1,1)
tivptl(2,nptl)=tivptl(2,1)
idptl(nptl)=idnucl
else
do is=maproj-ns+1,maproj !make the nsf first projectile nucleon final (not wounded)
if(infragm.eq.2)istptl(is)=0
if(idptl(is).eq.1120)npps=npps+1
if(idptl(is).eq.1220)npns=npns+1
enddo
endif
endif
c number of participants
if(laproj.gt.1)then
npjevt=maproj-npps-npns
npppar=max(0,laproj-npps)
npnpar=npjevt-npppar
c set participant projectile as non spectators
do i=1,maproj
if(idptl(i).eq.1120)then
if(npppar.gt.0)then
npppar=npppar-1
else !restore spectators
iorptl(i)=0
if(infragm.eq.0)istptl(i)=0
endif
endif
if(idptl(i).eq.1220)then
if(npnpar.gt.0)then
npnpar=npnpar-1
else !restore spectators
iorptl(i)=0
if(infragm.eq.0)istptl(i)=0
endif
endif
enddo
endif
endif
1000 return
1001 iret=-1
goto 1000
end
c------------------------------------------------------------------------------
function fsibcrse(egy,mapro,matar)
c------------------------------------------------------------------------------
c hadron-proton particle production cross section with Sibyll.
c egy - center of mass energy
c------------------------------------------------------------------------------
include 'epos.inc'
dimension SDIF(3)
if(iclpro.eq.1)then
L=2
elseif(iclpro.eq.2)then
L=1
else
L=3
endif
call SIB_SIGMA_HP(L,egy,ST,SEL,SINEL,SDIF,SL,RHO)
if(matar.gt.1)then
C calculate hadron-A(matar) cross section
CALL GLAUBER(matar,ST,SL,RHO,SIGTA,SIGELAdum,SIGQEA)
fsibcrse=SIGTA-SIGQEA
else
fsibcrse=SINEL
endif
if(mapro.gt.1)fsibcrse=ainfin !???????? temporary
return
end
c------------------------------------------------------------------------------
double precision function sibcrse(ek,mapro,matar,id)
c------------------------------------------------------------------------------
c inelastic cross section of Sibyll
c if id=0, target = air
c ek - kinetic energy in GeV
c maproj - projec mass number (1<maproj<64)
c matarg - projec mass number
c id - proj id (sibyll code)
c------------------------------------------------------------------------------
include 'epos.inc'
double precision egy
COMMON /CLENNN/ SSIGNUC(60), ALNUC(60)
sibcrse=0.d0
call idmass(1120,amt1)
call idmass(1220,amt2)
amtar=0.5*(amt1+amt2)
if(mapro.eq.1)call idmass(idproj,ampro)
if(matar.eq.1)call idmass(idtarg,amtar)
egy=dble(ek+ampro)
if(id.eq.0)then
if(maproj.eq.1)then
sqs=sqrt( 2*real(egy)*amtar+amtar**2+ampro**2 )
if(iclpro.eq.1)then
L=2
elseif(iclpro.eq.2)then
L=1
else
L=3
endif
call SIB_SIGMA_HAIR (L,sqs,sibcr)
sibcrse=dble(sibcr)
else
EO=real(egy)*1.e-3 !e0 in TeV
CALL SIGNUC_INI(mapro,E0) ! fills SSIGNUC and ALNUC
sibcrse = dble(SSIGNUC(mapro))
endif
else
sqs=sqrt( 2*real(egy)*amtar+amtar**2+ampro**2 )
sibcrse=dble(fsibcrse(sqs,mapro,matar))
endif
return
end
c--------------------------------------------------------------------
function S_RNDM(idum)
c--------------------------------------------------------------------
c random number generator
c--------------------------------------------------------------------
include 'epos.inc'
S_RNDM=rangen()
if(irandm.eq.1)write(ifch,*)'S_RNDM()= ',S_RNDM,idum
return
end
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