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medium-simple.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+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
SUBROUTINE MEDINIT(FILE,id,etam)
IMPLICIT NONE
C--medium parameters
COMMON/MEDPARAM/CENTRMIN,CENTRMAX,BREAL,CENTR,RAU,NF
INTEGER NF
DOUBLE PRECISION CENTRMIN,CENTRMAX,BREAL,CENTR,RAU
COMMON/MEDPARAMINT/TAUI,TI,TC,D3,ZETA3,D,
&N0,SIGMANN,A,WOODSSAXON
DOUBLE PRECISION TAUI,TI,TC,ALPHA,BETA,GAMMA,D3,ZETA3,D,N0,
&SIGMANN
INTEGER A
LOGICAL WOODSSAXON
C--max rapidity
common/rapmax2/etamax2
double precision etamax2
C--longitudinal boost of momentum distribution
common/boostmed/boost
logical boost
C--factor to vary Debye mass
COMMON/MDFAC/MDFACTOR,MDSCALEFAC
DOUBLE PRECISION MDFACTOR,MDSCALEFAC
C--nuclear thickness function
COMMON /THICKFNC/ RMAX,TA(100,2)
DOUBLE PRECISION RMAX,TA
C--geometrical cross section
COMMON /CROSSSEC/ IMPMAX,CROSS(200,3)
DOUBLE PRECISION IMPMAX,CROSS
C--identifier of log file
common/logfile/logfid
integer logfid
DATA RAU/10./
DATA D3/0.9d0/
DATA ZETA3/1.2d0/
C--local variables
INTEGER I,LUN,POS,IOS,id
double precision etam
CHARACTER*100 BUFFER,LABEL,tempbuf
CHARACTER*80 FILE
character firstchar
logical fileexist
boost = .true.
etamax2 = etam
logfid = id
IOS=0
LUN=77
C--default settings
TAUI=0.6d0
TI=0.36d0
TC=0.17d0
WOODSSAXON=.TRUE.
CENTRMIN=0.d0
CENTRMAX=10.d0
NF=3
A=208
N0=0.17d0
D=0.54d0
SIGMANN=6.2
MDFACTOR=0.45d0
MDSCALEFAC=0.9d0
C--read settings from file
write(logfid,*)
inquire(file=FILE,exist=fileexist)
if(fileexist)then
write(logfid,*)'Reading medium parameters from ',FILE
OPEN(unit=LUN,file=FILE,status='old',err=10)
do 20 i=1,1000
READ(LUN, '(A)', iostat=ios) BUFFER
if (ios.ne.0) goto 30
firstchar = buffer(1:1)
if (firstchar.eq.'#') goto 20
POS=SCAN(BUFFER,' ')
LABEL=BUFFER(1:POS)
BUFFER=BUFFER(POS+1:)
IF (LABEL=="TAUI")THEN
READ(BUFFER,*,IOSTAT=IOS) TAUI
ELSE IF (LABEL=="TI") THEN
READ(BUFFER,*,IOSTAT=IOS) TI
ELSE IF (LABEL=="TC") THEN
READ(BUFFER,*,IOSTAT=IOS) TC
ELSE IF (LABEL=="WOODSSAXON") THEN
READ(BUFFER,*,IOSTAT=IOS) WOODSSAXON
ELSE IF (LABEL=="CENTRMIN") THEN
READ(BUFFER,*,IOSTAT=IOS) CENTRMIN
ELSE IF (LABEL=="CENTRMAX") THEN
READ(BUFFER,*,IOSTAT=IOS) CENTRMAX
ELSE IF (LABEL=="NF") THEN
READ(BUFFER,*,IOSTAT=IOS) NF
ELSE IF (LABEL=="A") THEN
READ(BUFFER,*,IOSTAT=IOS) A
ELSE IF (LABEL=="N0") THEN
READ(BUFFER,*,IOSTAT=IOS) N0
ELSE IF (LABEL=="D") THEN
READ(BUFFER,*,IOSTAT=IOS) D
ELSE IF (LABEL=="SIGMANN") THEN
READ(BUFFER,*,IOSTAT=IOS) SIGMANN
ELSE IF (LABEL=="MDFACTOR") THEN
READ(BUFFER,*,IOSTAT=IOS) MDFACTOR
ELSE IF (LABEL=="MDSCALEFAC") THEN
READ(BUFFER,*,IOSTAT=IOS) MDSCALEFAC
else
write(logfid,*)'unknown label ',label
endif
20 continue
30 close(LUN,status='keep')
write(logfid,*)'...done'
goto 40
10 write(logfid,*)'Could not open medium parameter file, '//
& 'will run with default settings.'
else
write(logfid,*)'No medium parameter file found, '//
& 'will run with default settings.'
endif
40 write(logfid,*)'using parameters:'
write(logfid,*)'TAUI =',TAUI
write(logfid,*)'TI =',TI
write(logfid,*)'TC =',TC
write(logfid,*)'WOODSSAXON =',WOODSSAXON
write(logfid,*)'CENTRMIN =',CENTRMIN
write(logfid,*)'CENTRMAX =',CENTRMAX
write(logfid,*)'NF =',NF
write(logfid,*)'A =',A
write(logfid,*)'N0 =',N0
write(logfid,*)'D =',D
write(logfid,*)'SIGMANN =',SIGMANN
write(logfid,*)'MDFACTOR =',MDFACTOR
write(logfid,*)'MDSCALEFAC =',MDSCALEFAC
write(logfid,*)
write(logfid,*)
write(logfid,*)
C--calculate T_A(x,y)
CALL CALCTA
C--calculate geometrical cross section
CALL CALCXSECTION
END
SUBROUTINE MEDNEXTEVT
IMPLICIT NONE
C--medium parameters
COMMON/MEDPARAM/CENTRMIN,CENTRMAX,BREAL,CENTR,RAU,NF
INTEGER NF
DOUBLE PRECISION CENTRMIN,CENTRMAX,BREAL,CENTR,RAU
COMMON/MEDPARAMINT/TAUI,TI,TC,D3,ZETA3,D,
&N0,SIGMANN,A,WOODSSAXON
DOUBLE PRECISION TAUI,TI,TC,ALPHA,BETA,GAMMA,D3,ZETA3,D,N0,
&SIGMANN
INTEGER A
LOGICAL WOODSSAXON
C--geometrical cross section
COMMON /CROSSSEC/ IMPMAX,CROSS(200,3)
DOUBLE PRECISION IMPMAX,CROSS
C--local variables
integer i,j
DOUBLE PRECISION PYR,R,b1,b2,gettemp
C--pick an impact parameter
r=(pyr(0)*(centrmax-centrmin)+centrmin)/100.
i=0
do 130 j=1,200
if ((r-cross(j,3)/cross(200,3)).ge.0.) then
i=i+1
else
goto 132
endif
130 continue
132 continue
b1 = (i-1)*0.1d0
b2 = i*0.1d0
breal = (b2*(cross(i,3)/cross(200,3)-r)
& +b1*(r-cross(i+1,3)/cross(200,3)))/
& (cross(i,3)/cross(200,3)-cross(i+1,3)/cross(200,3))
centr = r;
END
double precision function getcentrality()
implicit none
COMMON/MEDPARAM/CENTRMIN,CENTRMAX,BREAL,CENTR,RAU,NF
INTEGER NF
DOUBLE PRECISION CENTRMIN,CENTRMAX,BREAL,CENTR,RAU
getcentrality=centr
end
SUBROUTINE PICKVTX(X,Y)
IMPLICIT NONE
DOUBLE PRECISION X,Y
C--medium parameters
COMMON/MEDPARAM/CENTRMIN,CENTRMAX,BREAL,CENTR,RAU,NF
INTEGER NF
DOUBLE PRECISION CENTRMIN,CENTRMAX,BREAL,CENTR,RAU
C--local variables
DOUBLE PRECISION X1,X2,Y1,Y2,Z,XVAL,YVAL,ZVAL,NTHICK,PYR
X1=BREAL/2.-RAU
X2=RAU-BREAL/2.
Y1=-SQRT(4*RAU**2-BREAL**2)/2.
Y2=SQRT(4*RAU**2-BREAL**2)/2.
131 XVAL=PYR(0)*(X2-X1)+X1
YVAL=PYR(0)*(Y2-Y1)+Y1
IF((NTHICK(XVAL-BREAL/2.,YVAL).EQ.0.d0).OR.
& NTHICK(XVAL+BREAL/2.,YVAL).EQ.0.d0) GOTO 131
ZVAL=PYR(0)*NTHICK(-BREAL/2.,0d0)*NTHICK(BREAL/2.,0d0)
Z=NTHICK(XVAL-BREAL/2.,YVAL)*NTHICK(XVAL+BREAL/2.,YVAL)
IF(ZVAL.GT.Z) GOTO 131
X=XVAL
Y=YVAL
END
SUBROUTINE SETB(BVAL)
IMPLICIT NONE
C--medium parameters
COMMON/MEDPARAM/CENTRMIN,CENTRMAX,BREAL,CENTR,RAU,NF
INTEGER NF
DOUBLE PRECISION CENTRMIN,CENTRMAX,BREAL,CENTR,RAU
DOUBLE PRECISION BVAL
BREAL=BVAL
END
SUBROUTINE GETSCATTERER(X,Y,Z,T,TYPE,PX,PY,PZ,E,MS)
IMPLICIT NONE
C--medium parameters
COMMON/MEDPARAM/CENTRMIN,CENTRMAX,BREAL,CENTR,RAU,NF
INTEGER NF
DOUBLE PRECISION CENTRMIN,CENTRMAX,BREAL,CENTR,RAU
C--internal medium parameters
COMMON/MEDPARAMINT/TAUI,TI,TC,D3,ZETA3,D,
&N0,SIGMANN,A,WOODSSAXON
DOUBLE PRECISION TAUI,TI,TC,ALPHA,BETA,GAMMA,D3,ZETA3,D,N0,
&SIGMANN
INTEGER A
LOGICAL WOODSSAXON
C--longitudinal boost of momentum distribution
common/boostmed/boost
logical boost
C--function calls
DOUBLE PRECISION GETTEMP,GETMD,GETMOM,GETMS
C--identifier of log file
common/logfile/logfid
integer logfid
C--local variables
DOUBLE PRECISION X,Y,Z,T,MS,PX,PY,PZ,E,MD,TEMP
INTEGER TYPE
DOUBLE PRECISION R,PYR,pmax,wt,tau,theta,phi,pi,p,ys,pz2,e2
DATA PI/3.141592653589793d0/
R=PYR(0)
IF(R.LT.(2.*12.*NF*D3/3.)/(2.*12.*NF*D3/3.+3.*16.*ZETA3/2.))THEN
TYPE=2
ELSE
TYPE=21
ENDIF
MS=GETMS(X,Y,Z,T)
MD=GETMD(X,Y,Z,T)
TEMP=GETTEMP(X,Y,Z,T)
tau=sqrt(t**2-z**2)
if (boost) then
ys = 0.5*log((t+z)/(t-z))
else
ys = 0.d0
endif
pmax = 10.*temp
IF(TEMP.LT.1.D-2)THEN
write(logfid,*)'asking for a scattering centre without medium:'
write(logfid,*)'at (x,y,z,t)=',X,Y,Z,T
write(logfid,*)'making one up to continue but '//
& 'something is wrong!'
TYPE=21
PX=0.d0
PY=0.d0
PZ=0.d0
MS=GETMS(0.d0,0.d0,0.d0,0.d0)
MD=GETMD(0.d0,0.d0,0.d0,0.d0)
E=SQRT(PX**2+PY**2+PZ**2+MS**2)
RETURN
ENDIF
10 p = pyr(0)**0.3333333*pmax
E2 = sqrt(p**2+ms**2)
if (type.eq.2) then
wt = (exp(ms/temp)-1.)/(exp(E2/temp)-1.)
else
wt = (exp(ms/temp)+1.)/(exp(E2/temp)+1.)
endif
if (wt.gt.1.) write(logfid,*)'Error in getscatterer: weight = ',wt
if (wt.lt.0.) write(logfid,*)'Error in getscatterer: weight = ',wt
if (pyr(0).gt.wt) goto 10
phi = pyr(0)*2.*pi
theta = -acos(2.*pyr(0)-1.)+pi
px = p*sin(theta)*cos(phi)
py = p*sin(theta)*sin(phi)
pz2 = p*cos(theta)
E = cosh(ys)*E2 + sinh(ys)*pz2
pz = sinh(ys)*E2 + cosh(ys)*pz2
END
SUBROUTINE AVSCATCEN(X,Y,Z,T,PX,PY,PZ,E,m)
IMPLICIT NONE
C--longitudinal boost of momentum distribution
common/boostmed/boost
logical boost
C--max rapidity
common/rapmax2/etamax2
double precision etamax2
C--local variables
double precision x,y,z,t,px,py,pz,e,getms,m,ys
if (boost) then
ys = 0.5*log((t+z)/(t-z))
if ((z.eq.0.d0).and.(t.eq.0.d0)) ys =0.d0
if (ys.gt.etamax2) ys=etamax2
if (ys.lt.-etamax2) ys=-etamax2
else
ys = 0.d0
endif
m = getms(x,y,z,t)
e = m*cosh(ys)
px = 0.d0
py = 0.d0
pz = m*sinh(ys)
end
SUBROUTINE maxscatcen(PX,PY,PZ,E,m)
IMPLICIT NONE
C--longitudinal boost of momentum distribution
common/boostmed/boost
logical boost
C--max rapidity
common/rapmax2/etamax2
double precision etamax2
C--local variables
double precision px,py,pz,e,getmsmax,m,ys
if (boost) then
ys = etamax2
else
ys = 0.d0
endif
m = getmsmax()
e = m*cosh(ys)
px = 0.d0
py = 0.d0
pz = m*sinh(ys)
end
DOUBLE PRECISION FUNCTION GETMD(X1,Y1,Z1,T1)
IMPLICIT NONE
C--factor to vary Debye mass
COMMON/MDFAC/MDFACTOR,MDSCALEFAC
DOUBLE PRECISION MDFACTOR,MDSCALEFAC
DOUBLE PRECISION X1,Y1,Z1,T1,GETTEMP
GETMD=MDSCALEFAC*3.*GETTEMP(X1,Y1,Z1,T1)
GETMD=MAX(GETMD,MDFACTOR)
END
DOUBLE PRECISION FUNCTION GETMS(X2,Y2,Z2,T2)
IMPLICIT NONE
DOUBLE PRECISION X2,Y2,Z2,T2,GETMD
GETMS=GETMD(X2,Y2,Z2,T2)/SQRT(2.)
END
DOUBLE PRECISION FUNCTION GETNEFF(X3,Y3,Z3,T3)
IMPLICIT NONE
COMMON/MEDPARAM/CENTRMIN,CENTRMAX,BREAL,CENTR,RAU,NF
INTEGER NF
DOUBLE PRECISION CENTRMIN,CENTRMAX,BREAL,CENTR,RAU
COMMON/MEDPARAMINT/TAUI,TI,TC,D3,ZETA3,D,
&N0,SIGMANN,A,WOODSSAXON
DOUBLE PRECISION TAUI,TI,TC,ALPHA,BETA,GAMMA,D3,ZETA3,D,N0,
&SIGMANN
INTEGER A
LOGICAL WOODSSAXON
C-- local variables
DOUBLE PRECISION X3,Y3,Z3,T3,PI,GETTEMP,tau,cosheta
DATA PI/3.141592653589793d0/
tau = sqrt(t3**2-z3**2)
cosheta = t3/tau
GETNEFF=(2.*6.*NF*D3*2./3. + 16.*ZETA3*3./2.)
& *GETTEMP(X3,Y3,Z3,T3)**3/PI**2
getneff = getneff/cosheta
END
DOUBLE PRECISION FUNCTION GETTEMP(X4,Y4,Z4,T4)
IMPLICIT NONE
C--medium parameters
COMMON/MEDPARAM/CENTRMIN,CENTRMAX,BREAL,CENTR,RAU,NF
INTEGER NF
DOUBLE PRECISION CENTRMIN,CENTRMAX,BREAL,CENTR,RAU
COMMON/MEDPARAMINT/TAUI,TI,TC,D3,ZETA3,D,
&N0,SIGMANN,A,WOODSSAXON
DOUBLE PRECISION TAUI,TI,TC,ALPHA,BETA,GAMMA,D3,ZETA3,D,N0,
&SIGMANN
INTEGER A
LOGICAL WOODSSAXON
C--max rapidity
common/rapmax2/etamax2
double precision etamax2
C--local variables
DOUBLE PRECISION X4,Y4,Z4,T4,TAU,NPART,EPS0,EPSIN,TEMPIN,PI,
&NTHICK,ys
DATA PI/3.141592653589793d0/
GETTEMP=0.D0
IF(ABS(Z4).GT.T4)RETURN
TAU=SQRT(T4**2-Z4**2)
C--check for overlap region
IF((NTHICK(X4-BREAL/2.,Y4).EQ.0.d0).OR.
&NTHICK(X4+BREAL/2.,Y4).EQ.0.d0) RETURN
ys = 0.5*log((t4+z4)/(t4-z4))
if (abs(ys).gt.etamax2) return
C--determine initial temperature at transverse position
IF(WOODSSAXON)THEN
EPS0=(16.*8.+7.*2.*6.*NF)*PI**2*TI**4/240.
EPSIN=EPS0*NPART(X4-BREAL/2.,Y4,X4+BREAL/2.,Y4)
& *PI*RAU**2/(2.*A)
TEMPIN=(EPSIN*240./(PI**2*(16.*8.+7.*2.*6.*NF)))**0.25
ELSE
TEMPIN=TI
ENDIF
C--calculate temperature if before initial time
IF(TAU.LE.TAUI)THEN
GETTEMP=TEMPIN*TAU/TAUI
ELSE
C--evolve temperature
GETTEMP=TEMPIN*(TAUI/TAU)**0.3333
ENDIF
IF(GETTEMP.LT.TC) GETTEMP=0.d0
END
DOUBLE PRECISION FUNCTION GETTEMPMAX()
IMPLICIT NONE
C--medium parameters
COMMON/MEDPARAM/CENTRMIN,CENTRMAX,BREAL,CENTR,RAU,NF
INTEGER NF
DOUBLE PRECISION CENTRMIN,CENTRMAX,BREAL,CENTR,RAU
COMMON/MEDPARAMINT/TAUI,TI,TC,D3,ZETA3,D,
&N0,SIGMANN,A,WOODSSAXON
DOUBLE PRECISION TAUI,TI,TC,ALPHA,BETA,GAMMA,D3,ZETA3,D,N0,
&SIGMANN
INTEGER A
LOGICAL WOODSSAXON
C--function call
DOUBLE PRECISION GETTEMP
GETTEMPMAX=GETTEMP(0.D0,0.D0,0.D0,TAUI)
END
DOUBLE PRECISION FUNCTION GETMDMAX()
IMPLICIT NONE
C--factor to vary Debye mass
COMMON/MDFAC/MDFACTOR,MDSCALEFAC
DOUBLE PRECISION MDFACTOR,MDSCALEFAC
DOUBLE PRECISION GETTEMPMAX
GETMDMAX=MDSCALEFAC*3.*GETTEMPMAX()
GETMDMAX=MAX(GETMDMAX,MDFACTOR)
END
DOUBLE PRECISION FUNCTION GETMDMIN()
IMPLICIT NONE
C--medium parameters
COMMON/MEDPARAM/CENTRMIN,CENTRMAX,BREAL,CENTR,RAU,NF
INTEGER NF
DOUBLE PRECISION CENTRMIN,CENTRMAX,BREAL,CENTR,RAU
COMMON/MEDPARAMINT/TAUI,TI,TC,D3,ZETA3,D,
&N0,SIGMANN,A,WOODSSAXON
DOUBLE PRECISION TAUI,TI,TC,ALPHA,BETA,GAMMA,D3,ZETA3,D,N0,
&SIGMANN
INTEGER A
LOGICAL WOODSSAXON
C--factor to vary Debye mass
COMMON/MDFAC/MDFACTOR,MDSCALEFAC
DOUBLE PRECISION MDFACTOR,MDSCALEFAC
DOUBLE PRECISION GETTEMPMAX
GETMDMIN=MDSCALEFAC*3.*TC
GETMDMIN=MAX(GETMDMIN,MDFACTOR)
END
DOUBLE PRECISION FUNCTION GETMSMAX()
IMPLICIT NONE
DOUBLE PRECISION GETMDMAX,SQRT
GETMSMAX=GETMDMAX()/SQRT(2.D0)
END
DOUBLE PRECISION FUNCTION GETNATMDMIN()
IMPLICIT NONE
C--medium parameters
COMMON/MEDPARAM/CENTRMIN,CENTRMAX,BREAL,CENTR,RAU,NF
INTEGER NF
DOUBLE PRECISION CENTRMIN,CENTRMAX,BREAL,CENTR,RAU
COMMON/MEDPARAMINT/TAUI,TI,TC,D3,ZETA3,D,
&N0,SIGMANN,A,WOODSSAXON
DOUBLE PRECISION TAUI,TI,TC,ALPHA,BETA,GAMMA,D3,ZETA3,D,N0,
&SIGMANN
INTEGER A
LOGICAL WOODSSAXON
C--max rapidity
common/rapmax2/etamax2
double precision etamax2
C--factor to vary Debye mass
COMMON/MDFAC/MDFACTOR,MDSCALEFAC
DOUBLE PRECISION MDFACTOR,MDSCALEFAC,PI
DATA PI/3.141592653589793d0/
C--local variables
DOUBLE PRECISION T,GETMDMIN
T=GETMDMIN()/(MDSCALEFAC*3.)
GETNATMDMIN=(2.*6.*NF*D3*2./3. + 16.*ZETA3*3./2.)
& *T**3/PI**2
END
DOUBLE PRECISION FUNCTION GETLTIMEMAX()
IMPLICIT NONE
C--medium parameters
COMMON/MEDPARAM/CENTRMIN,CENTRMAX,BREAL,CENTR,RAU,NF
INTEGER NF
DOUBLE PRECISION CENTRMIN,CENTRMAX,BREAL,CENTR,RAU
COMMON/MEDPARAMINT/TAUI,TI,TC,D3,ZETA3,D,
&N0,SIGMANN,A,WOODSSAXON
DOUBLE PRECISION TAUI,TI,TC,ALPHA,BETA,GAMMA,D3,ZETA3,D,N0,
&SIGMANN
INTEGER A
LOGICAL WOODSSAXON
C--max rapidity
common/rapmax2/etamax2
double precision etamax2
C--function call
DOUBLE PRECISION GETTEMPMAX
GETLTIMEMAX=TAUI*(GETTEMPMAX()/TC)**3*cosh(etamax2)
END
DOUBLE PRECISION FUNCTION GETNEFFMAX()
IMPLICIT NONE
COMMON/MEDPARAM/CENTRMIN,CENTRMAX,BREAL,CENTR,RAU,NF
INTEGER NF
DOUBLE PRECISION CENTRMIN,CENTRMAX,BREAL,CENTR,RAU
COMMON/MEDPARAMINT/TAUI,TI,TC,D3,ZETA3,D,
&N0,SIGMANN,A,WOODSSAXON
DOUBLE PRECISION TAUI,TI,TC,ALPHA,BETA,GAMMA,D3,ZETA3,D,N0,
&SIGMANN
INTEGER A
LOGICAL WOODSSAXON
C--max rapidity
common/rapmax2/etamax2
double precision etamax2
C-- local variables
DOUBLE PRECISION PI,GETTEMPMAX
DATA PI/3.141592653589793d0/
GETNEFFMAX=(2.*6.*NF*D3*2./3. + 16.*ZETA3*3./2.)
& *GETTEMPMAX()**3/PI**2
END
DOUBLE PRECISION FUNCTION NPART(XX1,YY1,XX2,YY2)
IMPLICIT NONE
COMMON/MEDPARAMINT/TAUI,TI,TC,D3,ZETA3,D,
&N0,SIGMANN,A,WOODSSAXON
DOUBLE PRECISION TAUI,TI,TC,ALPHA,BETA,GAMMA,D3,ZETA3,D,N0,
&SIGMANN
INTEGER A
LOGICAL WOODSSAXON
C--local variables
DOUBLE PRECISION XX1,YY1,XX2,YY2,NTHICK
NPART = NTHICK(XX1,YY1)*(1.-EXP(-SIGMANN*NTHICK(XX2,YY2))) +
& NTHICK(XX2,YY2)*(1.-EXP(-SIGMANN*NTHICK(XX1,YY1)))
END
DOUBLE PRECISION FUNCTION NTHICK(X1,Y1)
IMPLICIT NONE
C--medium parameters
COMMON/MEDPARAM/CENTRMIN,CENTRMAX,BREAL,CENTR,RAU,NF
INTEGER NF
DOUBLE PRECISION CENTRMIN,CENTRMAX,BREAL,CENTR,RAU
COMMON/MEDPARAMINT/TAUI,TI,TC,D3,ZETA3,D,
&N0,SIGMANN,A,WOODSSAXON
DOUBLE PRECISION TAUI,TI,TC,ALPHA,BETA,GAMMA,D3,ZETA3,D,N0,
&SIGMANN
INTEGER A
LOGICAL WOODSSAXON
C--identifier of log file
common/logfile/logfid
integer logfid
C--nuclear thickness function
COMMON /THICKFNC/ RMAX,TA(100,2)
DOUBLE PRECISION RMAX,TA
INTEGER LINE,LMIN,LMAX,I
DOUBLE PRECISION X1,Y1,XA(4),YA(4),Y,DY,R,C,B,DELTA
R=SQRT(X1**2+Y1**2)
IF(R.GT.TA(100,1))THEN
NTHICK=0.
ELSE
LINE=INT(R*99.d0/TA(100,1)+1)
LMIN=MAX(LINE,1)
LMIN=MIN(LMIN,99)
IF((R.LT.TA(LMIN,1)).OR.(R.GT.TA(LMIN+1,1)))
& write(logfid,*)LINE,LMIN,R,TA(LMIN,1),TA(LMIN+1,1)
XA(1)=TA(LMIN,1)
XA(2)=TA(LMIN+1,1)
YA(1)=TA(LMIN,2)
YA(2)=TA(LMIN+1,2)
C=(YA(2)-YA(1))/(XA(2)-XA(1))
B=YA(1)-C*XA(1)
NTHICK=C*R+B
ENDIF
END
SUBROUTINE CALCTA()
IMPLICIT NONE
C--medium parameters
COMMON/MEDPARAM/CENTRMIN,CENTRMAX,BREAL,CENTR,RAU,NF
INTEGER NF
DOUBLE PRECISION CENTRMIN,CENTRMAX,BREAL,CENTR,RAU
COMMON/MEDPARAMINT/TAUI,TI,TC,D3,ZETA3,D,
&N0,SIGMANN,A,WOODSSAXON
DOUBLE PRECISION TAUI,TI,TC,ALPHA,BETA,GAMMA,D3,ZETA3,D,N0,
&SIGMANN
INTEGER A
LOGICAL WOODSSAXON
C-- nuclear thickness function
COMMON /THICKFNC/ RMAX,TA(100,2)
DOUBLE PRECISION RMAX,TA
C--variables for integration
COMMON/INTEG/B,R
DOUBLE PRECISION B,R
C--local variables
INTEGER NSTEPS,I
DOUBLE PRECISION EPS,HFIRST,Y
NSTEPS=100
EPS=1.E-4
HFIRST=0.1D0
R=1.12*A**(0.33333)-0.86*A**(-0.33333)
RMAX=2.*R
DO 10 I=1,NSTEPS
C--set transverse position
B=(I-1)*2.D0*R/NSTEPS
Y=0.D0
C--integrate along longitudinal line
CALL ODEINT(Y,-2*R,2*R,EPS,HFIRST,0.d0,101)
TA(I,1)=B
TA(I,2)=Y
10 CONTINUE
END
SUBROUTINE CALCXSECTION()
IMPLICIT NONE
C--medium parameters
COMMON/MEDPARAM/CENTRMIN,CENTRMAX,BREAL,CENTR,RAU,NF
INTEGER NF
DOUBLE PRECISION CENTRMIN,CENTRMAX,BREAL,CENTR,RAU
COMMON/MEDPARAMINT/TAUI,TI,TC,D3,ZETA3,D,
&N0,SIGMANN,A,WOODSSAXON
DOUBLE PRECISION TAUI,TI,TC,ALPHA,BETA,GAMMA,D3,ZETA3,D,N0,
&SIGMANN
INTEGER A
LOGICAL WOODSSAXON
C-- geometrical cross section
COMMON /CROSSSEC/ IMPMAX,CROSS(200,3)
DOUBLE PRECISION IMPMAX,CROSS
C--local variables
INTEGER IX,IY,IB
DOUBLE PRECISION B,P,PROD,X,Y,NTHICK,NPART,pprev
pprev=0.
DO 30 IB=1,200
B=0.1d0*IB
PROD=1.d0
DO 10 IX=1,100
DO 20 IY=1,100
X=-20.d0+IX*0.4d0
Y=-20.d0+IY*0.4d0
PROD=PROD*
&EXP(-NTHICK(X+B/2.D0,Y)*SIGMANN)**(0.16d0*NTHICK(X-B/2.D0,Y))
20 CONTINUE
10 CONTINUE
P=(1.D0-PROD)*8.8D0/14.D0*B
CROSS(IB,1)=B
CROSS(IB,2)=P
if (ib.eq.1) then
cross(ib,3)=0.
else
cross(ib,3)=cross(ib-1,3)+(p+pprev)/2.*0.1
endif
pprev=p
30 CONTINUE
IMPMAX=19.95
END
DOUBLE PRECISION FUNCTION MEDDERIV(XVAL,W)
IMPLICIT NONE
DOUBLE PRECISION XVAL
INTEGER W
C--medium parameters
COMMON/MEDPARAMINT/TAUI,TI,TC,D3,ZETA3,D,
&N0,SIGMANN,A,WOODSSAXON
DOUBLE PRECISION TAUI,TI,TC,ALPHA,BETA,GAMMA,D3,ZETA3,D,N0,
&SIGMANN
INTEGER A
LOGICAL WOODSSAXON
C--variables for integration
COMMON/INTEG/B,R
DOUBLE PRECISION B,R
IF (W.EQ.1) THEN
C--XVAL corresponds to z-coordinate
MEDDERIV=N0/(1+EXP((SQRT(B**2+XVAL**2)-R)/D))
ELSE
MEDDERIV=0.D0
ENDIF
END