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example_7.f
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example_7.f
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C****************************************************************************
C The program for calculation of the general properties of
C neutral particles in the interactions by the HIJING model.
C Written by V.Uzhinsky, CERN, Oct. 2003
C***************************************************************************
CHARACTER FRAME*8,PROJ*8,TARG*8
COMMON/HIMAIN1/ NATT,EATT,JATT,NT,NP,N0,N01,N10,N11
COMMON/HIMAIN2/KATT(130000,4),PATT(130000,4)
C ********information of produced particles
COMMON/HIPARNT/HIPR1(100),IHPR2(50),HINT1(100),IHNT2(50)
SAVE /HIPARNT/
C
C ********Event Options and parameters
CHARACTER *1 KEY
CHARACTER *12 FNAME
PARAMETER (NWPAWC=1000000)
COMMON/PAWC/HMEMORY(NWPAWC)
COMMON/RANSEED/NSEED
SAVE /RANSEED/
NSEED=0
write(6,*)'====================================================='
write(6,*)'The program for calculation of general properties of '
write(6,*)' neutral particles (Pi_0, Lambda0, K0_S, Phi '
write(6,*)' in the HIJING model. '
write(6,*)'====================================================='
write(6,*)
write(6,*)' You can work in Lab. or CM systems '
write(6,*)' Would you like to use CM system? Y - Yes, N - No? '
read(5,1001) KEY
1001 format(A1)
if(KEY.eq.'Y'.or.KEY.eq.'y') then
write(6,*)'CM system is used --------------------------------'
FRAME='CMS'
else
write(6,*)'LAB system is used -------------------------------'
FRAME='LAB'
endif
write(6,*)'Enter the corresponding energy per NN collisions (GeV)'
read(5,*) EFRM
write(6,*)
write(6,*)'Enter a type of the projectile particle'
write(6,*)
write(6,*)' P proton, PBAR anti-proton,'
write(6,*)' N neutron, NBAR anti-neutron,'
write(6,*)' PI+ - positive pion, PI- negative pion,'
write(6,*)' K+ positive kaon, K- negative kaon'
write(6,*)' A - nucleus --------------------------'
read(5,1002) PROJ
1002 format(A8)
if(PROJ.ne.'A') then
IAP=1
if(PROJ.eq.'P' ) IZP= 1
if(PROJ.eq.'PBAR') IZP=-1
if(PROJ.eq.'N' ) IZP= 0
if(PROJ.eq.'NBAR') IZP= 0
if(PROJ.eq.'PI+' ) IZP= 1
if(PROJ.eq.'PI-' ) IZP=-1
if(PROJ.eq.'K+' ) IZP= 1
if(PROJ.eq.'K-' ) IZP=-1
else
write(6,*)
write(6,*)'Enter mass number and charge of the proj. nucleus'
read(5,*) IAP, IZP
endif
write(6,*)
write(6,*)'Enter a type of the target particle (same notations)'
read(5,1002) TARG
if(TARG.ne.'A') then
IAT=1
if(TARG.eq.'P' ) IZT= 1
if(TARG.eq.'PBAR') IZT=-1
if(TARG.eq.'N' ) IZT= 0
if(TARG.eq.'NBAR') IZT= 0
if(TARG.eq.'PI+' ) IZT= 1
if(TARG.eq.'PI-' ) IZT=-1
if(TARG.eq.'K+' ) IZT= 1
if(TARG.eq.'K-' ) IZT=-1
else
write(6,*)
write(6,*)'Enter mass number and charge of the target nucleus'
read(5,*) IAT, IZT
endif
write(6,*)
write(6,*)'Enter number of events'
read(5,*) N_events
write(6,*)'Enter FILENAME for HBOOK output'
read(5,1003) FNAME
1003 format(A12)
c------------------------------------------------------------------
CALL HIJSET(EFRM,FRAME,PROJ,TARG,IAP,IZP,IAT,IZT)
C ********Initialize HIJING
WRITE(6,*)' Simulation of interactions with'
WRITE(6,*)
WRITE(6,*)' Proj = ',PROJ,' and Targ = ',TARG
WRITE(6,*)' IAP =',IAP ,' IAT =',IAT
WRITE(6,*)' IZP =',IZP ,' IZT =',IZT
WRITE(6,*)
WRITE(6,*)' Reference frame - ',FRAME
WRITE(6,*)' ENERGY ',EFRM,' GeV'
WRITE(6,*)' Number of generated events -',N_events
WRITE(6,*)
BMIN=0.
BMAX=HIPR1(34)+HIPR1(35)
WRITE(6,*)
c------------------------------------------------------------------
CALL HLIMIT(NWPAWC)
c------------------------------------------------------------------
c------------------------ Pi0 mesons ------------------------------
c------------------------------------------------------------------
Nu_max=MIN(IAP*IAT+1,2000)
if(PROJ.eq.'A'.or.TARG.eq.'A') then
CH_max=5*Nu_max/2.
else
CH_max=99.5
endif
CALL HBOOK1(10,' Pi0 meson multiplicity distribution',
,100,-0.5,CH_max,0.)
if(FRAME.eq.'CMS') then
Eta_l=-15.
Eta_h=+15.
else
Eta_l=-2.0
Eta_h=Alog(2.*EFRM)+2.
endif
NbinEta=(Eta_h-Eta_l)/0.2
CALL HBOOK1(20,' Pi0 meson pseudo-rapidity distribution',
,NbinEta,Eta_l,Eta_h,0.)
if(FRAME.eq.'CMS') then
Y_l=-Alog(EFRM)-2.
Y_h=+Alog(EFRM)+2.
else
Y_l=-2.0
Y_h=Alog(2.*EFRM)+2.
endif
NbinY=(Y_h-Y_l)/0.2
CALL HBOOK1(30,' Pi0 meson rapidity distribution',
,NbinY,Y_l,Y_h,0.)
CALL HBOOK1(40,' Pi0 meson Pt distribution',
,100,0.,10.,0.)
if(FRAME.eq.'CMS') then
E_l= 0.
E_h=EFRM/2.
else
E_l= 0.
E_h=EFRM
endif
NbinE=(E_h-E_l)/0.5
CALL HBOOK1(50,' Pi0 meson energy distribution',
,NbinE,E_l,E_h,0.)
CALL HBOOK1(60,' Pi0 meson Cos(Theta) distribution',
,40,-1.,1.,0.)
CALL HBOOK1(70,' Pi0 meson Phi distribution',
,180,0.,180.,0.)
CALL HBOOK2(80,' Phi - Eta correlation of Pi0 meson',
,NbinEta,Eta_l,Eta_h,180,-180.,180.,0.)
C----------------------------------------------------------------
c--------------------------- Lambda0 ---------------------------
c----------------------------------------------------------------
CALL HBOOK1(110,' Lambda0 multiplicity distribution',
,100,-0.5,float(IAP+IAT),0.)
CALL HBOOK1(120,' Lambda0 pseudo-rapidity distribution',
,NbinEta,Eta_l,Eta_h,0.)
CALL HBOOK1(130,' Lambda0 rapidity distribution',
,NbinY,Y_l,Y_h,0.)
CALL HBOOK1(140,' Lambda0 Pt distribution',
,100,0.,10.,0.)
CALL HBOOK1(150,' Lambda0 energy distribution',
,NbinE,E_l,E_h,0.)
CALL HBOOK1(160,' Lambda0 Cos(Theta) distribution',
,40,-1.,1.,0.)
CALL HBOOK1(170,' Lambda0 Phi distribution',
,180,0.,180.,0.)
CALL HBOOK2(180,' Phi - Eta correlation of Lambda0',
,NbinEta,Eta_l,Eta_h,180,-180.,180.,0.)
c----------------------------------------------------------------
c------------------------------- K0_S ---------------------------
c----------------------------------------------------------------
CALL HBOOK1(210,' K0S multiplicity distribution',
,100,-0.5,CH_max,0.)
CALL HBOOK1(220,' K0S pseudo-rapidity distribution',
,NbinEta,Eta_l,Eta_h,0.)
CALL HBOOK1(230,' K0S rapidity distribution',
,NbinY,Y_l,Y_h,0.)
CALL HBOOK1(240,' K0S Pt distribution',
,100,0.,10.,0.)
CALL HBOOK1(250,' K0S energy distribution',
,NbinE,E_l,E_h,0.)
CALL HBOOK1(260,' K0S Cos(Theta) distribution',
,40,-1.,1.,0.)
CALL HBOOK1(270,' K0S Phi distribution',
,180,0.,180.,0.)
CALL HBOOK2(280,' Phi - Eta correlation of K0S',
,NbinEta,Eta_l,Eta_h,180,-180.,180.,0.)
c----------------------------------------------------------------
c------------------------- Phi meson ---------------------------
c----------------------------------------------------------------
CALL HBOOK1(310,' Phi meson multiplicity distribution',
,100,-0.5,CH_max/3.,0.)
CALL HBOOK1(320,' Phi meson pseudo-rapidity distribution',
,NbinEta,Eta_l,Eta_h,0.)
CALL HBOOK1(330,' Phi meson rapidity distribution',
,NbinY,Y_l,Y_h,0.)
CALL HBOOK1(340,' Phi meson Pt distribution',
,100,0.,10.,0.)
CALL HBOOK1(350,' Phi meson energy distribution',
,NbinE,E_l,E_h,0.)
CALL HBOOK1(360,' Phi meson Cos(Theta) distribution',
,40,-1.,1.,0.)
CALL HBOOK1(370,' Phi meson Phi distribution',
,180,0.,180.,0.)
CALL HBOOK2(380,' Phi - Eta correlation of Phi meson',
,NbinEta,Eta_l,Eta_h,180,-180.,180.,0.)
c----------------------------------------------------------------
IHPR2(12)=1 ! To suppress the particle decays
CALL LUGIVE('MDCY(C333,1)=0') ! To suppress Phi decay
c CALL LUGIVE('MDCY(C1114,1)=0;MDCY(C-1114,1)=0') ! To suppress Delta- Decay
c----------------------------------------------------------------
Pi=4.*ATAN(1.) ! 3.14159
DO 2000 I_event=1,N_events
WRITE(6,*)' Event # ',I_event,' ------------------'
C
CALL HIJING(FRAME,BMIN,BMAX)
C
N_pi0=0
N_lam=0
N_k0s=0
N_phi=0
c write(6,*)' NATT --------- ',NATT
DO 3000 I=1,NATT
c write(6,*)i,KATT(I,1)
if(KATT(I,2).eq. 0) go to 3000 ! reject non-interacting projectile
if(KATT(I,2).eq. 1) go to 3000 ! reject elastic scattering
if(KATT(I,2).eq.10) go to 3000 ! reject non-interacting target
if(KATT(I,2).eq.11) go to 3000 ! reject elastic scattering
ID=KATT(i,1)
ICH=LUCHGE(KATT(I,1))/3
Amass=ULMASS(KATT(I,1))
E=PATT(i,4)
Pz=PATT(i,3)
Pt=sqrt(PATT(i,1)**2+PATT(i,2)**2)
P=sqrt(Pz**2+Pt**2)
if(P-Pz.ge.1.0e-4) then
Eta= 0.5*Alog((P+Pz)/(P-Pz))
elseif(P+Pz.ge.1.0e-4) then
Eta=-0.5*Alog((P-Pz)/(P+pz))
else
Eta=15.
endif
if(E-Pz.ge.1.0e-4) then
Y= 0.5*Alog((E+Pz)/(E-Pz))
elseif(E+Pz.ge.1.0e-4) then
Y=-0.5*Alog((E-Pz)/(E+pz))
else
Y=15.
endif
if(P.ge.1.0e-4) then
Cos_Theta=Pz/P
else
Cos_Theta=1.
endif
Phi=ULANGL(PATT(i,1),PATT(i,2))*180./Pi
c==========================================================
if(ID.eq.111) then ! Pi_0
N_pi0=N_pi0+1
Call HF1(20,Eta,1.)
Call HF1(30, Y,1.)
Call HF1(40, Pt,1.)
Call HF1(50, E,1.)
Call HF1(60,Cos_Theta,1.)
Call HF1(70,Phi,1.)
Call HFILL(80,Eta,Phi,1.)
Call Hf1(90,Float(Id),1.)
endif
if(ID.eq.3122) then ! Lambda0
N_lam=N_lam+1
Call HF1(120,Eta,1.)
Call HF1(130, Y,1.)
Call HF1(140, Pt,1.)
Call HF1(150, E,1.)
Call HF1(160,Cos_Theta,1.)
Call HF1(170,Phi,1.)
Call HFILL(180,Eta,Phi,1.)
endif
if(ID.eq.310) then ! K0_S
N_k0s=N_k0s+1
Call HF1(220,Eta,1.)
Call HF1(230, Y,1.)
Call HF1(240, Pt,1.)
Call HF1(250, E,1.)
Call HF1(260,Cos_Theta,1.)
Call HF1(270,Phi,1.)
Call HFILL(280,Eta,Phi,1.)
endif
if(Id.eq.333) then ! Phi
N_phi=N_phi+1
Call HF1(320,Eta,1.)
Call HF1(330, Y,1.)
Call HF1(340, Pt,1.)
Call HF1(350, E,1.)
Call HF1(360,Cos_Theta,1.)
Call HF1(370,Phi,1.)
Call HFILL(380,Eta,Phi,1.)
endif
3000 CONTINUE
c PAUSE
CALL HF1( 10,float(N_pi0),1.)
CALL HF1(110,float(N_lam),1.)
CALL HF1(210,float(N_k0s),1.)
CALL HF1(310,float(N_phi),1.)
2000 CONTINUE
c================ Normalization ===========================
C1=1./float(N_events) ! Multiplicity distr.
C2=0.
Call HOPERA( 10,'+', 10, 10,C1,C2)
Call HOPERA(110,'+',110,110,C1,C2)
Call HOPERA(210,'+',210,210,C1,C2)
Call HOPERA(310,'+',310,310,C1,C2)
C1=1./float(N_events)/((Eta_h-Eta_l)/NbinEta)! Eta distr.
C2=0.
Call HOPERA( 20,'+', 20, 20,C1,C2)
Call HOPERA(120,'+',120,120,C1,C2)
Call HOPERA(220,'+',220,220,C1,C2)
Call HOPERA(320,'+',320,320,C1,C2)
C1=1./float(N_events)/((Y_h-Y_l)/NbinY) ! Y distr.
C2=0.
Call HOPERA( 30,'+', 30, 30,C1,C2)
Call HOPERA(130,'+',130,130,C1,C2)
Call HOPERA(230,'+',230,230,C1,C2)
Call HOPERA(330,'+',330,330,C1,C2)
C1=1./float(N_events)/0.1 ! Pt distr.
C2=0.
Call HOPERA( 40,'+', 40, 40,C1,C2)
Call HOPERA(140,'+',140,140,C1,C2)
Call HOPERA(240,'+',240,240,C1,C2)
Call HOPERA(340,'+',340,340,C1,C2)
C1=1./float(N_events)/((E_h-E_l)/NbinE) ! E distr.
C2=0.
Call HOPERA( 50,'+', 50, 50,C1,C2)
Call HOPERA(150,'+',150,150,C1,C2)
Call HOPERA(250,'+',250,250,C1,C2)
Call HOPERA(350,'+',350,350,C1,C2)
C1=1./float(N_events)/0.05 ! Cos Theta distr.
C2=0.
Call HOPERA( 60,'+', 60, 60,C1,C2)
Call HOPERA(160,'+',160,160,C1,C2)
Call HOPERA(260,'+',260,260,C1,C2)
Call HOPERA(360,'+',360,360,C1,C2)
C1=1./float(N_events) ! Phi distr.
C2=0.
Call HOPERA( 70,'+', 70, 70,C1,C2)
Call HOPERA(170,'+',170,170,C1,C2)
Call HOPERA(270,'+',270,270,C1,C2)
Call HOPERA(370,'+',370,370,C1,C2)
c================ Writing results =========================
CALL HRPUT(0,FNAME,'N')
END
FUNCTION RAN(NSEED)
RAN=RLU(NSEED)
RETURN
END