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hijing1.383_ampt.f
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hijing1.383_ampt.f
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c.................... hijing1.383_ampt.f
c Version 1.383
c The variables isng in HIJSFT and JL in ATTRAD were not initialized.
c The version initialize them. (as found by Fernando Marroquim)
c
c
c
c Version 1.382
c Nuclear distribution for deuteron is taken as the Hulthen wave
c function as provided by Brian Cole (Columbia)
clin used my own implementation of impact parameter
clin & proton-neutron distance within a deuteron.
c
c
c Version 1.381
c
c The parameters for Wood-Saxon distribution for deuteron are
c constrained to give the right rms ratius 2.116 fm
c (R=0.0, D=0.5882)
c
c
c Version 1.38
c
c The following common block is added to record the number of elastic
c (NELT, NELP) and inelastic (NINT, NINP) participants
c
c COMMON/HJGLBR/NELT,NINT,NELP,NINP
c SAVE /HJGLBR/
c
c Version 1.37
c
c A bug in the quenching subroutine is corrected. When calculating the
c distance between two wounded nucleons, the displacement of the
c impact parameter was not inculded. This bug was discovered by
c Dr. V.Uzhinskii JINR, Dubna, Russia
c
c
C Version 1.36
c
c Modification Oct. 8, 1998. In hijing, log(ran(nseed)) occasionally
c causes overfloat. It is modified to log(max(ran(nseed),1.0e-20)).
c
c
C Nothing important has been changed here. A few 'garbage' has been
C cleaned up here, like common block HJJET3 for the sea quark strings
C which were originally created to implement the DPM scheme which
C later was abadoned in the final version. The lines which operate
C on these data are also deleted in the program.
C
C
C Version 1.35
C There are some changes in the program: subroutine HARDJET is now
C consolidated with HIJHRD. HARDJET is used to re-initiate PYTHIA
C for the triggered hard processes. Now that is done altogether
C with other normal hard processes in modified JETINI. In the new
C version one calls JETINI every time one calls HIJHRD. In the new
C version the effect of the isospin of the nucleon on hard processes,
C especially direct photons is correctly considered.
C For A+A collisions, one has to initilize pythia
C separately for each type of collisions, pp, pn,np and nn,
C or hp and hn for hA collisions. In JETINI we use the following
C catalogue for different types of collisions:
C h+h: h+h (itype=1)
C h+A: h+p (itype=1), h+n (itype=2)
C A+h: p+h (itype=1), n+h (itype=2)
C A+A: p+p (itype=1), p+n (itype=2), n+p (itype=3), n+n (itype=4)
C*****************************************************************
c
C
C Version 1.34
C Last modification on January 5, 1998. Two mistakes are corrected in
C function G. A Mistake in the subroutine Parton is also corrected.
C (These are pointed out by Ysushi Nara).
C
C
C Last modifcation on April 10, 1996. To conduct final
C state radiation, PYTHIA reorganize the two scattered
C partons and their final momenta will be a little
C different. The summed total momenta of the partons
C from the final state radiation are stored in HINT1(26-29)
C and HINT1(36-39) which are little different from
C HINT1(21-24) and HINT1(41-44).
C
C Version 1.33
C
C Last modfication on September 11, 1995. When HIJING and
C PYTHIA are initialized, the shadowing is evaluated at
C b=0 which is the maximum. This will cause overestimate
C of shadowing for peripheral interactions. To correct this
C problem, shadowing is set to zero when initializing. Then
C use these maximum cross section without shadowing as a
C normalization of the Monte Carlo. This however increase
C the computing time. IHNT2(16) is used to indicate whether
C the sturcture function is called for (IHNT2(16)=1) initialization
C or for (IHNT2(16)=0)normal collisions simulation
C
C Last modification on Aagust 28, 1994. Two bugs associate
C with the impact parameter dependence of the shadowing is
C corrected.
C
C
c Last modification on October 14, 1994. One bug is corrected
c in the direct photon production option in subroutine
C HIJHRD.( this problem was reported by Jim Carroll and Mike Beddo).
C Another bug associated with keeping the decay history
C in the particle information is also corrected.(this problem
C was reported by Matt Bloomer)
C
C
C Last modification on July 15, 1994. The option to trig on
C heavy quark production (charm IHPR2(18)=0 or beauty IHPR2(18)=1)
C is added. To do this, set IHPR2(3)=3. For inclusive production,
C one should reset HIPR1(10)=0.0. One can also trig larger pt
C QQbar production by giving HIPR1(10) a nonvanishing value.
C The mass of the heavy quark in the calculation of the cross
C section (HINT1(59)--HINT1(65)) is given by HIPR1(7) (the
C default is the charm mass D=1.5). We also include a separate
C K-factor for heavy quark and direct photon production by
C HIPR1(23)(D=2.0).
C
C Last modification on May 24, 1994. The option to
C retain the information of all particles including those
C who have decayed is IHPR(21)=1 (default=0). KATT(I,3) is
C added to contain the line number of the parent particle
C of the current line which is produced via a decay.
C KATT(I,4) is the status number of the particle: 11=particle
C which has decayed; 1=finally produced particle.
C
C
C Last modification on May 24, 1994( in HIJSFT when valence quark
C is quenched, the following error is corrected. 1.2*IHNT2(1) -->
C 1.2*IHNT2(1)**0.333333, 1.2*IHNT2(3) -->1.2*IHNT(3)**0.333333)
C
C
C Last modification on March 16, 1994 (heavy flavor production
C processes MSUB(81)=1 MSUB(82)=1 have been switched on,
C charm production is the default, B-quark option is
C IHPR2(18), when it is switched on, charm quark is
C automatically off)
C
C
C Last modification on March 23, 1994 (an error is corrected
C in the impact parameter dependence of the jet cross section)
C
C Last modification Oct. 1993 to comply with non-vax
C machines' compiler
C
C*********************************************
C LAST MODIFICATION April 5, 1991
CQUARK DISTRIBUTIOIN (1-X)**A/(X**2+C**2/S)**B
C(A=HIPR1(44),B=HIPR1(46),C=HIPR1(45))
C STRING FLIP, VENUS OPTION IHPR2(15)=1,IN WHICH ONE CAN HAVE ONE AND
C TWO COLOR CHANGES, (1-W)**2,W*(1-W),W*(1-W),AND W*2, W=HIPR1(18),
C AMONG PT DISTRIBUTION OF SEA QUARKS IS CONTROLLED BY HIPR1(42)
C
C gluon jets can form a single string system
C
C initial state radiation is included
C
C all QCD subprocesses are included
c
c direct particles production is included(currently only direct
C photon)
c
C Effect of high P_T trigger bias on multiple jets distribution
c
C******************************************************************
C HIJING.10 *
C Heavy Ion Jet INteraction Generator *
C by *
C X. N. Wang and M. Gyulassy *
C Lawrence Berkeley Laboratory *
C *
C******************************************************************
C
C******************************************************************
C NFP(K,1),NFP(K,2)=flavor of q and di-q, NFP(K,3)=present ID of *
C proj, NFP(K,4) original ID of proj. NFP(K,5)=colli status(0=no,*
C 1=elastic,2=the diffrac one in single-diffrac,3= excited string.*
C |NFP(K,6)| is the total # of jet production, if NFP(K,6)<0 it *
C can not produce jet anymore. NFP(K,10)=valence quarks scattering*
C (0=has not been,1=is going to be, -1=has already been scattered *
C NFP(k,11) total number of interactions this proj has suffered *
C PP(K,1)=PX,PP(K,2)=PY,PP(K,3)=PZ,PP(K,4)=E,PP(K,5)=M(invariant *
C mass), PP(K,6,7),PP(K,8,9)=transverse momentum of quark and *
C diquark,PP(K,10)=PT of the hard scattering between the valence *
C quarks; PP(K,14,15)=the mass of quark,diquark. *
C******************************************************************
C
C****************************************************************
C
C SUBROUTINE HIJING
C
C****************************************************************
SUBROUTINE HIJING(FRAME,BMIN0,BMAX0)
cbz1/25/99
PARAMETER (MAXPTN=400001)
clin-4/20/01 PARAMETER (MAXSTR = 1600)
PARAMETER (MAXSTR=150001)
cbz1/25/99end
clin-4/26/01:
PARAMETER (MAXIDL=4001)
cbz1/31/99
DOUBLE PRECISION GX0, GY0, GZ0, FT0, PX0, PY0, PZ0, E0, XMASS0
DOUBLE PRECISION GX5, GY5, GZ5, FT5, PX5, PY5, PZ5, E5, XMASS5
DOUBLE PRECISION ATAUI, ZT1, ZT2, ZT3
DOUBLE PRECISION xnprod,etprod,xnfrz,etfrz,
& dnprod,detpro,dnfrz,detfrz
clin-8/2015:
DOUBLE PRECISION vxp0,vyp0,vzp0,xstrg0,ystrg0,xstrg,ystrg
cbz1/31/99end
CHARACTER FRAME*8
DIMENSION SCIP(300,300),RNIP(300,300),SJIP(300,300),JTP(3),
& IPCOL(90000),ITCOL(90000)
COMMON/HPARNT/HIPR1(100),IHPR2(50),HINT1(100),IHNT2(50)
cc SAVE /HPARNT/
C
COMMON/hjcrdn/YP(3,300),YT(3,300)
cc SAVE /hjcrdn/
clin-7/16/03 NINT is a intrinsic fortran function, rename it to NINTHJ
c COMMON/HJGLBR/NELT,NINT,NELP,NINP
COMMON/HJGLBR/NELT,NINTHJ,NELP,NINP
cc SAVE /HJGLBR/
COMMON/HMAIN1/EATT,JATT,NATT,NT,NP,N0,N01,N10,N11
cc SAVE /HMAIN1/
clin-4/26/01
c COMMON/HMAIN2/KATT(130000,4),PATT(130000,4)
COMMON/HMAIN2/KATT(MAXSTR,4),PATT(MAXSTR,4)
cc SAVE /HMAIN2/
COMMON/HSTRNG/NFP(300,15),PP(300,15),NFT(300,15),PT(300,15)
cc SAVE /HSTRNG/
COMMON/HJJET1/NPJ(300),KFPJ(300,500),PJPX(300,500),
& PJPY(300,500),PJPZ(300,500),PJPE(300,500),
& PJPM(300,500),NTJ(300),KFTJ(300,500),
& PJTX(300,500),PJTY(300,500),PJTZ(300,500),
& PJTE(300,500),PJTM(300,500)
cc SAVE /HJJET1/
clin-4/2008
c COMMON/HJJET2/NSG,NJSG(900),IASG(900,3),K1SG(900,100),
c & K2SG(900,100),PXSG(900,100),PYSG(900,100),
c & PZSG(900,100),PESG(900,100),PMSG(900,100)
COMMON/HJJET2/NSG,NJSG(MAXSTR),IASG(MAXSTR,3),K1SG(MAXSTR,100),
& K2SG(MAXSTR,100),PXSG(MAXSTR,100),PYSG(MAXSTR,100),
& PZSG(MAXSTR,100),PESG(MAXSTR,100),PMSG(MAXSTR,100)
cc SAVE /HJJET2/
COMMON/HJJET4/NDR,IADR(MAXSTR,2),KFDR(MAXSTR),PDR(MAXSTR,5)
clin-4/2008:
c common/xydr/rtdr(900,2)
common/xydr/rtdr(MAXSTR,2)
cc SAVE /HJJET4/
COMMON/RNDF77/NSEED
cc SAVE /RNDF77/
C
COMMON/LUJETS/N,K(9000,5),P(9000,5),V(9000,5)
cc SAVE /LUJETS/
COMMON/LUDAT1/MSTU(200),PARU(200),MSTJ(200),PARJ(200)
cc SAVE /LUDAT1/
clin-9/29/03 changed name in order to distinguish from /prec2/
COMMON /ARPRC/ ITYPAR(MAXSTR),
& GXAR(MAXSTR), GYAR(MAXSTR), GZAR(MAXSTR), FTAR(MAXSTR),
& PXAR(MAXSTR), PYAR(MAXSTR), PZAR(MAXSTR), PEAR(MAXSTR),
& XMAR(MAXSTR)
ccbz11/11/98
c COMMON /ARPRC/ ITYP(MAXSTR),
c & GX(MAXSTR), GY(MAXSTR), GZ(MAXSTR), FT(MAXSTR),
c & PX(MAXSTR), PY(MAXSTR), PZ(MAXSTR), EE(MAXSTR),
c & XM(MAXSTR)
cc SAVE /ARPRC/
ccbz11/11/98end
cbz1/25/99
COMMON /PARA1/ MUL
cc SAVE /PARA1/
COMMON /prec1/GX0(MAXPTN),GY0(MAXPTN),GZ0(MAXPTN),FT0(MAXPTN),
& PX0(MAXPTN), PY0(MAXPTN), PZ0(MAXPTN), E0(MAXPTN),
& XMASS0(MAXPTN), ITYP0(MAXPTN)
cc SAVE /prec1/
COMMON /prec2/GX5(MAXPTN),GY5(MAXPTN),GZ5(MAXPTN),FT5(MAXPTN),
& PX5(MAXPTN), PY5(MAXPTN), PZ5(MAXPTN), E5(MAXPTN),
& XMASS5(MAXPTN), ITYP5(MAXPTN)
cc SAVE /prec2/
COMMON /ilist7/ LSTRG0(MAXPTN), LPART0(MAXPTN)
cc SAVE /ilist7/
COMMON /ilist8/ LSTRG1(MAXPTN), LPART1(MAXPTN)
cc SAVE /ilist8/
COMMON /SREC1/ NSP, NST, NSI
cc SAVE /SREC1/
COMMON /SREC2/ATAUI(MAXSTR),ZT1(MAXSTR),ZT2(MAXSTR),ZT3(MAXSTR)
cc SAVE /SREC2/
cbz1/25/99end
clin-2/25/00
COMMON /frzout/ xnprod(30),etprod(30),xnfrz(30),etfrz(30),
& dnprod(30),detpro(30),dnfrz(30),detfrz(30)
cc SAVE /frzout/
clin-4/11/01 soft:
common/anim/nevent,isoft,isflag,izpc
cc SAVE /anim/
clin-4/25/01 soft3:
DOUBLE PRECISION PXSGS,PYSGS,PZSGS,PESGS,PMSGS,
1 GXSGS,GYSGS,GZSGS,FTSGS
COMMON/SOFT/PXSGS(MAXSTR,3),PYSGS(MAXSTR,3),PZSGS(MAXSTR,3),
& PESGS(MAXSTR,3),PMSGS(MAXSTR,3),GXSGS(MAXSTR,3),
& GYSGS(MAXSTR,3),GZSGS(MAXSTR,3),FTSGS(MAXSTR,3),
& K1SGS(MAXSTR,3),K2SGS(MAXSTR,3),NJSGS(MAXSTR)
cc SAVE /SOFT/
clin-4/26/01 lepton and photon info:
COMMON /NOPREC/ NNOZPC, ITYPN(MAXIDL),
& GXN(MAXIDL), GYN(MAXIDL), GZN(MAXIDL), FTN(MAXIDL),
& PXN(MAXIDL), PYN(MAXIDL), PZN(MAXIDL), EEN(MAXIDL),
& XMN(MAXIDL)
cc SAVE /NOPREC/
clin-6/22/01:
common /lastt/itimeh,bimp
cc SAVE /lastt/
COMMON /AREVT/ IAEVT, IARUN, MISS
common/phidcy/iphidcy,pttrig,ntrig,maxmiss,ipi0dcy
clin-7/2011 ioscar value is needed:
common /para7/ ioscar,nsmbbbar,nsmmeson
clin-2/2012 allow random orientation of reaction plane:
common /phiHJ/iphirp,phiRP
clin-8/2015:
common /precpa/vxp0(MAXPTN),vyp0(MAXPTN),vzp0(MAXPTN),
1 xstrg0(MAXPTN),ystrg0(MAXPTN),
2 xstrg(MAXPTN),ystrg(MAXPTN),istrg0(MAXPTN),istrg(MAXPTN)
SAVE
BMAX=MIN(BMAX0,HIPR1(34)+HIPR1(35))
BMIN=MIN(BMIN0,BMAX)
IF(IHNT2(1).LE.1 .AND. IHNT2(3).LE.1) THEN
BMIN=0.0
BMAX=2.5*SQRT(HIPR1(31)*0.1/HIPR1(40))
ENDIF
C ********HIPR1(31) is in mb =0.1fm**2
C*******THE FOLLOWING IS TO SELECT THE COORDINATIONS OF NUCLEONS
C BOTH IN PROJECTILE AND TARGET NUCLEAR( in fm)
C
YP(1,1)=0.0
YP(2,1)=0.0
YP(3,1)=0.0
IF(IHNT2(1).LE.1) GO TO 14
DO 10 KP=1,IHNT2(1)
5 R=HIRND(1)
X=RANART(NSEED)
CX=2.0*X-1.0
SX=SQRT(1.0-CX*CX)
C ********choose theta from uniform cos(theta) distr
PHI=RANART(NSEED)*2.0*HIPR1(40)
C ********choose phi form uniform phi distr 0 to 2*pi
YP(1,KP)=R*SX*COS(PHI)
YP(2,KP)=R*SX*SIN(PHI)
YP(3,KP)=R*CX
IF(HIPR1(29).EQ.0.0) GO TO 10
DO 8 KP2=1,KP-1
DNBP1=(YP(1,KP)-YP(1,KP2))**2
DNBP2=(YP(2,KP)-YP(2,KP2))**2
DNBP3=(YP(3,KP)-YP(3,KP2))**2
DNBP=DNBP1+DNBP2+DNBP3
IF(DNBP.LT.HIPR1(29)*HIPR1(29)) GO TO 5
C ********two neighbors cannot be closer than
C HIPR1(29)
8 CONTINUE
10 CONTINUE
clin-1/27/03 Hulthen wavefn for deuteron borrowed from hijing1.382.f,
c but modified [divide by 2, & x(p)=-x(n)]:
c (Note: hijing1.383.f has corrected this bug in hijing1.382.f)
if(IHNT2(1).EQ.2) then
rnd1=max(RANART(NSEED),1.0e-20)
rnd2=max(RANART(NSEED),1.0e-20)
rnd3=max(RANART(NSEED),1.0e-20)
R=-(log(rnd1)*4.38/2.0+log(rnd2)*0.85/2.0
& +4.38*0.85*log(rnd3)/(4.38+0.85))
X=RANART(NSEED)
CX=2.0*X-1.0
SX=SQRT(1.0-CX*CX)
PHI=RANART(NSEED)*2.0*HIPR1(40)
c R above is the relative distance between p & n in a deuteron:
R=R/2.
YP(1,1)=R*SX*COS(PHI)
YP(2,1)=R*SX*SIN(PHI)
YP(3,1)=R*CX
c p & n has opposite coordinates in the deuteron frame:
YP(1,2)=-YP(1,1)
YP(2,2)=-YP(2,1)
YP(3,2)=-YP(3,1)
endif
DO 12 I=1,IHNT2(1)-1
DO 12 J=I+1,IHNT2(1)
IF(YP(3,I).GT.YP(3,J)) GO TO 12
Y1=YP(1,I)
Y2=YP(2,I)
Y3=YP(3,I)
YP(1,I)=YP(1,J)
YP(2,I)=YP(2,J)
YP(3,I)=YP(3,J)
YP(1,J)=Y1
YP(2,J)=Y2
YP(3,J)=Y3
12 CONTINUE
C
C******************************
14 YT(1,1)=0.0
YT(2,1)=0.0
YT(3,1)=0.0
IF(IHNT2(3).LE.1) GO TO 24
DO 20 KT=1,IHNT2(3)
15 R=HIRND(2)
X=RANART(NSEED)
CX=2.0*X-1.0
SX=SQRT(1.0-CX*CX)
C ********choose theta from uniform cos(theta) distr
PHI=RANART(NSEED)*2.0*HIPR1(40)
C ********chose phi form uniform phi distr 0 to 2*pi
YT(1,KT)=R*SX*COS(PHI)
YT(2,KT)=R*SX*SIN(PHI)
YT(3,KT)=R*CX
IF(HIPR1(29).EQ.0.0) GO TO 20
DO 18 KT2=1,KT-1
DNBT1=(YT(1,KT)-YT(1,KT2))**2
DNBT2=(YT(2,KT)-YT(2,KT2))**2
DNBT3=(YT(3,KT)-YT(3,KT2))**2
DNBT=DNBT1+DNBT2+DNBT3
IF(DNBT.LT.HIPR1(29)*HIPR1(29)) GO TO 15
C ********two neighbors cannot be closer than
C HIPR1(29)
18 CONTINUE
20 CONTINUE
c
clin-1/27/03 Hulthen wavefn for deuteron borrowed from hijing1.382.f,
c but modified [divide by 2, & x(p)=-x(n)]:
if(IHNT2(3).EQ.2) then
rnd1=max(RANART(NSEED),1.0e-20)
rnd2=max(RANART(NSEED),1.0e-20)
rnd3=max(RANART(NSEED),1.0e-20)
R=-(log(rnd1)*4.38/2.0+log(rnd2)*0.85/2.0
& +4.38*0.85*log(rnd3)/(4.38+0.85))
X=RANART(NSEED)
CX=2.0*X-1.0
SX=SQRT(1.0-CX*CX)
PHI=RANART(NSEED)*2.0*HIPR1(40)
R=R/2.
YT(1,1)=R*SX*COS(PHI)
YT(2,1)=R*SX*SIN(PHI)
YT(3,1)=R*CX
YT(1,2)=-YT(1,1)
YT(2,2)=-YT(2,1)
YT(3,2)=-YT(3,1)
endif
c
DO 22 I=1,IHNT2(3)-1
DO 22 J=I+1,IHNT2(3)
IF(YT(3,I).LT.YT(3,J)) GO TO 22
Y1=YT(1,I)
Y2=YT(2,I)
Y3=YT(3,I)
YT(1,I)=YT(1,J)
YT(2,I)=YT(2,J)
YT(3,I)=YT(3,J)
YT(1,J)=Y1
YT(2,J)=Y2
YT(3,J)=Y3
22 CONTINUE
C********************
24 MISS=-1
50 MISS=MISS+1
clin-6/2009
c IF(MISS.GT.50) THEN
IF(MISS.GT.maxmiss) THEN
WRITE(6,*) 'infinite loop happened in HIJING'
STOP
ENDIF
clin-4/30/01:
itest=0
NATT=0
JATT=0
EATT=0.0
CALL HIJINI
NLOP=0
C ********Initialize for a new event
60 NT=0
NP=0
N0=0
N01=0
N10=0
N11=0
NELT=0
NINTHJ=0
NELP=0
NINP=0
NSG=0
NCOLT=0
C**** BB IS THE ABSOLUTE VALUE OF IMPACT PARAMETER,BB**2 IS
C RANDOMLY GENERATED AND ITS ORIENTATION IS RANDOMLY SET
C BY THE ANGLE PHI FOR EACH COLLISION.******************
C
BB=SQRT(BMIN**2+RANART(NSEED)*(BMAX**2-BMIN**2))
cbz6/28/99 flow1
clin-2/2012:
PHI=0.
if(iphirp.eq.1) PHI=2.0*HIPR1(40)*RANART(NSEED)
phiRP=phi
cbz6/28/99 flow1 end
BBX=BB*COS(PHI)
BBY=BB*SIN(PHI)
HINT1(19)=BB
HINT1(20)=PHI
C
DO 70 JP=1,IHNT2(1)
DO 70 JT=1,IHNT2(3)
SCIP(JP,JT)=-1.0
B2=(YP(1,JP)+BBX-YT(1,JT))**2+(YP(2,JP)+BBY-YT(2,JT))**2
R2=B2*HIPR1(40)/HIPR1(31)/0.1
C ********mb=0.1*fm, YP is in fm,HIPR1(31) is in mb
RRB1=MIN((YP(1,JP)**2+YP(2,JP)**2)
& /1.2**2/REAL(IHNT2(1))**0.6666667,1.0)
RRB2=MIN((YT(1,JT)**2+YT(2,JT)**2)
& /1.2**2/REAL(IHNT2(3))**0.6666667,1.0)
APHX1=HIPR1(6)*4.0/3.0*(IHNT2(1)**0.3333333-1.0)
& *SQRT(1.0-RRB1)
APHX2=HIPR1(6)*4.0/3.0*(IHNT2(3)**0.3333333-1.0)
& *SQRT(1.0-RRB2)
HINT1(18)=HINT1(14)-APHX1*HINT1(15)
& -APHX2*HINT1(16)+APHX1*APHX2*HINT1(17)
IF(IHPR2(14).EQ.0.OR.
& (IHNT2(1).EQ.1.AND.IHNT2(3).EQ.1)) THEN
GS=1.0-EXP(-(HIPR1(30)+HINT1(18))*ROMG(R2)/HIPR1(31))
RANTOT=RANART(NSEED)
IF(RANTOT.GT.GS) GO TO 70
GO TO 65
ENDIF
GSTOT0=2.0*(1.0-EXP(-(HIPR1(30)+HINT1(18))
& /HIPR1(31)/2.0*ROMG(0.0)))
R2=R2/GSTOT0
GS=1.0-EXP(-(HIPR1(30)+HINT1(18))/HIPR1(31)*ROMG(R2))
GSTOT=2.0*(1.0-SQRT(1.0-GS))
RANTOT=RANART(NSEED)*GSTOT0
IF(RANTOT.GT.GSTOT) GO TO 70
IF(RANTOT.GT.GS) THEN
CALL HIJCSC(JP,JT)
GO TO 70
C ********perform elastic collisions
ENDIF
65 SCIP(JP,JT)=R2
RNIP(JP,JT)=RANTOT
SJIP(JP,JT)=HINT1(18)
NCOLT=NCOLT+1
IPCOL(NCOLT)=JP
ITCOL(NCOLT)=JT
70 CONTINUE
C ********total number interactions proj and targ has
C suffered
clin-5/22/01 write impact parameter:
bimp=bb
write(6,*) '#impact parameter,nlop,ncolt=',bimp,nlop,ncolt
IF(NCOLT.EQ.0) THEN
NLOP=NLOP+1
IF(NLOP.LE.20.OR.
& (IHNT2(1).EQ.1.AND.IHNT2(3).EQ.1)) GO TO 60
RETURN
ENDIF
C ********At large impact parameter, there maybe no
C interaction at all. For NN collision
C repeat the event until interaction happens
C
IF(IHPR2(3).NE.0) THEN
NHARD=1+INT(RANART(NSEED)*(NCOLT-1)+0.5)
NHARD=MIN(NHARD,NCOLT)
JPHARD=IPCOL(NHARD)
JTHARD=ITCOL(NHARD)
clin-6/2009 ctest off:
c write(99,*) IAEVT,NHARD,NCOLT,JPHARD,JTHARD
ENDIF
C
IF(IHPR2(9).EQ.1) THEN
NMINI=1+INT(RANART(NSEED)*(NCOLT-1)+0.5)
NMINI=MIN(NMINI,NCOLT)
JPMINI=IPCOL(NMINI)
JTMINI=ITCOL(NMINI)
ENDIF
C ********Specifying the location of the hard and
C minijet if they are enforced by user
C
DO 200 JP=1,IHNT2(1)
DO 200 JT=1,IHNT2(3)
IF(SCIP(JP,JT).EQ.-1.0) GO TO 200
NFP(JP,11)=NFP(JP,11)+1
NFT(JT,11)=NFT(JT,11)+1
IF(NFP(JP,5).LE.1 .AND. NFT(JT,5).GT.1) THEN
NP=NP+1
N01=N01+1
ELSE IF(NFP(JP,5).GT.1 .AND. NFT(JT,5).LE.1) THEN
NT=NT+1
N10=N10+1
ELSE IF(NFP(JP,5).LE.1 .AND. NFT(JT,5).LE.1) THEN
NP=NP+1
NT=NT+1
N0=N0+1
ELSE IF(NFP(JP,5).GT.1 .AND. NFT(JT,5).GT.1) THEN
N11=N11+1
ENDIF
JOUT=0
NFP(JP,10)=0
NFT(JT,10)=0
C*****************************************************************
IF(IHPR2(8).EQ.0 .AND. IHPR2(3).EQ.0) GO TO 160
C ********When IHPR2(8)=0 no jets are produced
IF(NFP(JP,6).LT.0 .OR. NFT(JT,6).LT.0) GO TO 160
C ********jets can not be produced for (JP,JT)
C because not enough energy avaible for
C JP or JT
R2=SCIP(JP,JT)
HINT1(18)=SJIP(JP,JT)
TT=ROMG(R2)*HINT1(18)/HIPR1(31)
TTS=HIPR1(30)*ROMG(R2)/HIPR1(31)
NJET=0
IF(IHPR2(3).NE.0 .AND. JP.EQ.JPHARD .AND. JT.EQ.JTHARD) THEN
CALL JETINI(JP,JT,1)
CALL HIJHRD(JP,JT,0,JFLG,0)
HINT1(26)=HINT1(47)
HINT1(27)=HINT1(48)
HINT1(28)=HINT1(49)
HINT1(29)=HINT1(50)
HINT1(36)=HINT1(67)
HINT1(37)=HINT1(68)
HINT1(38)=HINT1(69)
HINT1(39)=HINT1(70)
C
IF(ABS(HINT1(46)).GT.HIPR1(11).AND.JFLG.EQ.2) NFP(JP,7)=1
IF(ABS(HINT1(56)).GT.HIPR1(11).AND.JFLG.EQ.2) NFT(JT,7)=1
IF(MAX(ABS(HINT1(46)),ABS(HINT1(56))).GT.HIPR1(11).AND.
& JFLG.GE.3) IASG(NSG,3)=1
IHNT2(9)=IHNT2(14)
IHNT2(10)=IHNT2(15)
DO 105 I05=1,5
HINT1(20+I05)=HINT1(40+I05)
HINT1(30+I05)=HINT1(50+I05)
105 CONTINUE
clin-6/2009 ctest off:
c write(99,*) jp,jt,IHPR2(3),HIPR1(10),njet,
c 1 ihnt2(9),hint1(21),hint1(22),hint1(23),
c 2 ihnt2(10),hint1(31),hint1(32),hint1(33)
c write(99,*) ' '
JOUT=1
IF(IHPR2(8).EQ.0) GO TO 160
RRB1=MIN((YP(1,JP)**2+YP(2,JP)**2)/1.2**2
& /REAL(IHNT2(1))**0.6666667,1.0)
RRB2=MIN((YT(1,JT)**2+YT(2,JT)**2)/1.2**2
& /REAL(IHNT2(3))**0.6666667,1.0)
APHX1=HIPR1(6)*4.0/3.0*(IHNT2(1)**0.3333333-1.0)
& *SQRT(1.0-RRB1)
APHX2=HIPR1(6)*4.0/3.0*(IHNT2(3)**0.3333333-1.0)
& *SQRT(1.0-RRB2)
HINT1(65)=HINT1(61)-APHX1*HINT1(62)
& -APHX2*HINT1(63)+APHX1*APHX2*HINT1(64)
TTRIG=ROMG(R2)*HINT1(65)/HIPR1(31)
NJET=-1
C ********subtract the trigger jet from total number
C of jet production to be done since it has
C already been produced here
XR1=-ALOG(EXP(-TTRIG)+RANART(NSEED)*(1.0-EXP(-TTRIG)))
106 NJET=NJET+1
XR1=XR1-ALOG(max(RANART(NSEED),1.0e-20))
IF(XR1.LT.TTRIG) GO TO 106
XR=0.0
107 NJET=NJET+1
XR=XR-ALOG(max(RANART(NSEED),1.0e-20))
IF(XR.LT.TT-TTRIG) GO TO 107
NJET=NJET-1
GO TO 112
ENDIF
C ********create a hard interaction with specified P_T
c when IHPR2(3)>0
IF(IHPR2(9).EQ.1.AND.JP.EQ.JPMINI.AND.JT.EQ.JTMINI) GO TO 110
C ********create at least one pair of mini jets
C when IHPR2(9)=1
C
clin-4/15/2010 changed .LT. to .LE. to avoid problem when two sides are equal;
c this problem may lead to a jet production when there should be none and
c crash the run; crashes at low energies were reported by P. Bhaduri.
c IF(IHPR2(8).GT.0 .AND.RNIP(JP,JT).LT.EXP(-TT)*
c & (1.0-EXP(-TTS))) GO TO 160
IF(IHPR2(8).GT.0 .AND.RNIP(JP,JT).LE.EXP(-TT)*
& (1.0-EXP(-TTS))) GO TO 160
c
C ********this is the probability for no jet production
110 XR=-ALOG(EXP(-TT)+RANART(NSEED)*(1.0-EXP(-TT)))
111 NJET=NJET+1
XR=XR-ALOG(max(RANART(NSEED),1.0e-20))
IF(XR.LT.TT) GO TO 111
112 NJET=MIN(NJET,IHPR2(8))
IF(IHPR2(8).LT.0) NJET=ABS(IHPR2(8))
C ******** Determine number of mini jet production
C
DO 150 ijet=1,NJET
CALL JETINI(JP,JT,0)
CALL HIJHRD(JP,JT,JOUT,JFLG,1)
C ********JFLG=1 jets valence quarks, JFLG=2 with
C gluon jet, JFLG=3 with q-qbar prod for
C (JP,JT). If JFLG=0 jets can not be produced
C this time. If JFLG=-1, error occured abandon
C this event. JOUT is the total hard scat for
C (JP,JT) up to now.
IF(JFLG.EQ.0) GO TO 160
IF(JFLG.LT.0) THEN
IF(IHPR2(10).NE.0) WRITE(6,*) 'error occured in HIJHRD'
GO TO 50
ENDIF
JOUT=JOUT+1
IF(ABS(HINT1(46)).GT.HIPR1(11).AND.JFLG.EQ.2) NFP(JP,7)=1
IF(ABS(HINT1(56)).GT.HIPR1(11).AND.JFLG.EQ.2) NFT(JT,7)=1
IF(MAX(ABS(HINT1(46)),ABS(HINT1(56))).GT.HIPR1(11).AND.
& JFLG.GE.3) IASG(NSG,3)=1
C ******** jet with PT>HIPR1(11) will be quenched
150 CONTINUE
160 CONTINUE
CALL HIJSFT(JP,JT,JOUT,IERROR)
IF(IERROR.NE.0) THEN
IF(IHPR2(10).NE.0) WRITE(6,*) 'error occured in HIJSFT'
GO TO 50
ENDIF
C
C ********conduct soft scattering between JP and JT
JATT=JATT+JOUT
200 CONTINUE
c
c**************************
c
clin-6/2009 write out initial minijet information:
clin-2/2012:
c call minijet_out(BB)
call minijet_out(BB,phiRP)
if(pttrig.gt.0.and.ntrig.eq.0) goto 50
clin-4/2012
clin-6/2009 write out initial transverse positions of initial nucleons:
c write(94,*) IAEVT,MISS,IHNT2(1),IHNT2(3)
DO 201 JP=1,IHNT2(1)
clin-6/2009:
c write(94,203) YP(1,JP)+0.5*BB, YP(2,JP), JP, NFP(JP,5)
clin-2/2012:
c write(94,203) YP(1,JP)+0.5*BB, YP(2,JP), JP, NFP(JP,5),yp(3,jp)
clin-4/2012:
c write(94,203) YP(1,JP)+0.5*BB*cos(phiRP),
c 1 YP(2,JP)+0.5*BB*sin(phiRP), JP, NFP(JP,5),yp(3,jp)
IF(NFP(JP,5).GT.2) THEN
NINP=NINP+1
ELSE IF(NFP(JP,5).EQ.2.OR.NFP(JP,5).EQ.1) THEN
NELP=NELP+1
ENDIF
201 continue
DO 202 JT=1,IHNT2(3)
clin-6/2009 target nucleon # has a minus sign for distinction from projectile:
c write(94,203) YT(1,JT)-0.5*BB, YT(2,JT), -JT, NFT(JT,5)
clin-2/2012:
c write(94,203) YT(1,JT)-0.5*BB, YT(2,JT), -JT, NFT(JT,5),yt(3,jt)
clin-4/2012:
c write(94,203) YT(1,JT)-0.5*BB*cos(phiRP),
c 1 YT(2,JT)-0.5*BB*sin(phiRP), -JT, NFT(JT,5),yt(3,jt)
IF(NFT(JT,5).GT.2) THEN
NINTHJ=NINTHJ+1
ELSE IF(NFT(JT,5).EQ.2.OR.NFT(JT,5).EQ.1) THEN
NELT=NELT+1
ENDIF
202 continue
c 203 format(f10.3,1x,f10.3,2(1x,I5))
c 203 format(f10.3,1x,f10.3,2(1x,I5),1x,f10.3)
c
c*******************************
C********perform jet quenching for jets with PT>HIPR1(11)**********
IF((IHPR2(8).NE.0.OR.IHPR2(3).NE.0).AND.IHPR2(4).GT.0.AND.
& IHNT2(1).GT.1.AND.IHNT2(3).GT.1) THEN
DO 271 I=1,IHNT2(1)
IF(NFP(I,7).EQ.1) CALL QUENCH(I,1)
271 CONTINUE
DO 272 I=1,IHNT2(3)
IF(NFT(I,7).EQ.1) CALL QUENCH(I,2)
272 CONTINUE
DO 273 ISG=1,NSG
IF(IASG(ISG,3).EQ.1) CALL QUENCH(ISG,3)
273 CONTINUE
ENDIF
clin*****4/09/01-soft1, default way of treating strings:
if(isoft.eq.1) then
clin-4/16/01 allow fragmentation:
isflag=1
cbz1/25/99
c.....transfer data from HIJING to ZPC
NSP = IHNT2(1)
NST = IHNT2(3)
NSI = NSG
ISTR = 0
NPAR = 0
DO 1008 I = 1, IHNT2(1)
ISTR = ISTR + 1
DO 1007 J = 1, NPJ(I)
cbz1/27/99
c.....for now only consider gluon cascade
IF (KFPJ(I, J) .EQ. 21) THEN
cbz1/27/99end
NPAR = NPAR + 1
LSTRG0(NPAR) = ISTR
LPART0(NPAR) = J
ITYP0(NPAR) = KFPJ(I, J)
cbz6/28/99 flow1
clin-7/20/01 add dble or sngl to make precisions consistent
c GX0(NPAR) = YP(1, I)
clin-2/2012:
c GX0(NPAR) = dble(YP(1, I) + 0.5 * BB)
GX0(NPAR) = dble(YP(1, I)+0.5*BB*cos(phiRP))
cbz6/28/99 flow1 end
c GY0(NPAR) = dble(YP(2, I))
GY0(NPAR) = dble(YP(2, I)+0.5*BB*sin(phiRP))
GZ0(NPAR) = 0d0
FT0(NPAR) = 0d0
PX0(NPAR) = dble(PJPX(I, J))
PY0(NPAR) = dble(PJPY(I, J))
PZ0(NPAR) = dble(PJPZ(I, J))
XMASS0(NPAR) = dble(PJPM(I, J))
c E0(NPAR) = dble(PJPE(I, J))
E0(NPAR) = dsqrt(PX0(NPAR)**2+PY0(NPAR)**2
1 +PZ0(NPAR)**2+XMASS0(NPAR)**2)
clin-7/20/01-end
cbz1/27/99
c.....end gluon selection
END IF
cbz1/27/99end
1007 CONTINUE
1008 CONTINUE
DO 1010 I = 1, IHNT2(3)
ISTR = ISTR + 1
DO 1009 J = 1, NTJ(I)
cbz1/27/99
c.....for now only consider gluon cascade
IF (KFTJ(I, J) .EQ. 21) THEN
cbz1/27/99end
NPAR = NPAR + 1
LSTRG0(NPAR) = ISTR
LPART0(NPAR) = J
ITYP0(NPAR) = KFTJ(I, J)
cbz6/28/99 flow1
clin-7/20/01 add dble or sngl to make precisions consistent
c GX0(NPAR) = YT(1, I)
clin-2/2012:
c GX0(NPAR) = dble(YT(1, I) - 0.5 * BB)
GX0(NPAR) = dble(YT(1, I)-0.5*BB*cos(phiRP))
cbz6/28/99 flow1 end
c GY0(NPAR) = dble(YT(2, I))
GY0(NPAR) = dble(YT(2, I)-0.5*BB*sin(phiRP))
GZ0(NPAR) = 0d0
FT0(NPAR) = 0d0
PX0(NPAR) = dble(PJTX(I, J))
PY0(NPAR) = dble(PJTY(I, J))
PZ0(NPAR) = dble(PJTZ(I, J))
XMASS0(NPAR) = dble(PJTM(I, J))
c E0(NPAR) = dble(PJTE(I, J))
E0(NPAR) = dsqrt(PX0(NPAR)**2+PY0(NPAR)**2
1 +PZ0(NPAR)**2+XMASS0(NPAR)**2)
cbz1/27/99
c.....end gluon selection
END IF
cbz1/27/99end
1009 CONTINUE
1010 CONTINUE
DO 1012 I = 1, NSG
ISTR = ISTR + 1
DO 1011 J = 1, NJSG(I)
cbz1/27/99
c.....for now only consider gluon cascade
IF (K2SG(I, J) .EQ. 21) THEN
cbz1/27/99end
NPAR = NPAR + 1
LSTRG0(NPAR) = ISTR
LPART0(NPAR) = J
ITYP0(NPAR) = K2SG(I, J)
clin-7/20/01 add dble or sngl to make precisions consistent:
GX0(NPAR) = 0.5d0 *
1 dble(YP(1, IASG(I, 1)) + YT(1, IASG(I, 2)))
GY0(NPAR) = 0.5d0 *
2 dble(YP(2, IASG(I, 1)) + YT(2, IASG(I, 2)))
GZ0(NPAR) = 0d0
FT0(NPAR) = 0d0
PX0(NPAR) = dble(PXSG(I, J))
PY0(NPAR) = dble(PYSG(I, J))
PZ0(NPAR) = dble(PZSG(I, J))
XMASS0(NPAR) = dble(PMSG(I, J))
c E0(NPAR) = dble(PESG(I, J))
E0(NPAR) = dsqrt(PX0(NPAR)**2+PY0(NPAR)**2
1 +PZ0(NPAR)**2+XMASS0(NPAR)**2)
cbz1/27/99
c.....end gluon selection
END IF
cbz1/27/99end
1011 CONTINUE
1012 CONTINUE
MUL = NPAR
cbz2/4/99
CALL HJANA1
cbz2/4/99end
clin-6/2009:
if(ioscar.eq.3) WRITE (95, *) IAEVT, mul
c.....call ZPC for parton cascade
CALL ZPCMN
c write out parton and wounded nucleon information to ana/zpc1.mom:
clin-6/2009:
c WRITE (14, 395) ITEST, MUL, bimp, NELP,NINP,NELT,NINTHJ
WRITE (14, 395) IAEVT, MISS, MUL, bimp, NELP,NINP,NELT,NINTHJ
DO 1013 I = 1, MUL
cc WRITE (14, 411) PX5(I), PY5(I), PZ5(I), ITYP5(I),
c & XMASS5(I), E5(I)
if(dmax1(abs(GX5(I)),abs(GY5(I)),abs(GZ5(I)),abs(FT5(I)))
1 .lt.9999) then
write(14,210) ITYP5(I), PX5(I), PY5(I), PZ5(I), XMASS5(I),
1 GX5(I), GY5(I), GZ5(I), FT5(I)
else
c change format for large numbers:
write(14,211) ITYP5(I), PX5(I), PY5(I), PZ5(I), XMASS5(I),
1 GX5(I), GY5(I), GZ5(I), FT5(I)
endif
1013 CONTINUE
210 format(I6,2(1x,f8.3),1x,f10.3,1x,f6.3,4(1x,f8.2))
211 format(I6,2(1x,f8.3),1x,f10.3,1x,f6.3,4(1x,e8.2))
395 format(3I8,f10.4,4I5)
clin-4/09/01:
itest=itest+1
c 411 FORMAT(1X, 3F10.3, I6, 2F10.3)
cbz3/19/99 end
clin-5/2009 ctest off:
c call frztm(1,1)
c.....transfer data back from ZPC to HIJING
DO 1014 I = 1, MUL
IF (LSTRG1(I) .LE. NSP) THEN
NSTRG = LSTRG1(I)
NPART = LPART1(I)
KFPJ(NSTRG, NPART) = ITYP5(I)
clin-7/20/01 add dble or sngl to make precisions consistent
PJPX(NSTRG, NPART) = sngl(PX5(I))
PJPY(NSTRG, NPART) = sngl(PY5(I))
PJPZ(NSTRG, NPART) = sngl(PZ5(I))
PJPE(NSTRG, NPART) = sngl(E5(I))
PJPM(NSTRG, NPART) = sngl(XMASS5(I))
ELSE IF (LSTRG1(I) .LE. NSP + NST) THEN
NSTRG = LSTRG1(I) - NSP
NPART = LPART1(I)
KFTJ(NSTRG, NPART) = ITYP5(I)
PJTX(NSTRG, NPART) = sngl(PX5(I))
PJTY(NSTRG, NPART) = sngl(PY5(I))
PJTZ(NSTRG, NPART) = sngl(PZ5(I))
PJTE(NSTRG, NPART) = sngl(E5(I))
PJTM(NSTRG, NPART) = sngl(XMASS5(I))
ELSE
NSTRG = LSTRG1(I) - NSP - NST
NPART = LPART1(I)
K2SG(NSTRG, NPART) = ITYP5(I)
PXSG(NSTRG, NPART) = sngl(PX5(I))
PYSG(NSTRG, NPART) = sngl(PY5(I))
PZSG(NSTRG, NPART) = sngl(PZ5(I))
PESG(NSTRG, NPART) = sngl(E5(I))
PMSG(NSTRG, NPART) = sngl(XMASS5(I))
END IF
1014 CONTINUE
cbz1/25/99end
cbz2/4/99
CALL HJANA2
cbz2/4/99end
clin*****4/09/01-soft2, put q+dq+X in strings into ZPC:
elseif(isoft.eq.2) then
NSP = IHNT2(1)
NST = IHNT2(3)