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Adding some QCD diffractive states to the PDG list
[u/mrichter/AliRoot.git] / PDF / tpdf / testgam.F
CommitLineData
21886bb6 1*
2* $Id$
3*
4* $Log$
5* Revision 1.1.1.4 2000/04/19 13:30:01 mclareni
6* Import version 8.04
7*
8* Revision 1.4 2000/04/09 10:06:56 plothow
9* new version 8.00 - MRS 98 and 99, CTEQ5 and GRV98 added
10*
11* Revision 1.3 1997/07/02 15:03:11 pdflib
12* potential bug removed in GRSGALO
13*
14* Revision 1.2 1996/10/28 16:10:10 pdflib
15* PDFLIB new version 7.04
16*
17* Revision 1.1.1.1 1996/04/12 15:30:17 plothow
18* Version 7.01
19*
20*
21#include "pdf/pilot.h"
22 PROGRAM TESTGAM
23C
24#include "pdf/impdp.inc"
25 PARAMETER (LFLPRT = 2)
26#include "pdf/w5051p2.inc"
27#include "pdf/w5051p7.inc"
28#include "pdf/w50510.inc"
29#include "pdf/w50511.inc"
30#include "pdf/w50512.inc"
31#include "pdf/w50513.inc"
32#include "pdf/w50516.inc"
33#include "pdf/w50517.inc"
34#include "pdf/w505110.inc"
35#include "pdf/w505120.inc"
36#include "pdf/w505122.inc"
37C
38#include "pdf/expdp.inc"
39 + DX,DQ,DUV,DDV,DUB,DDB,DSB,DCB,DBB,DTB,DGL,
40 + DQ2,DP2
41#include "pdf/expdp.inc"
42 + XI(32),WI(32),XX(33)
43 COMMON/W5051I9/XI,WI,XX,NTERMS
44#include "pdf/expdp.inc"
45 + XV(3),ZQ(5)
46 CHARACTER*20 PARM(NCHDIM)
47#include "pdf/expdp.inc"
48 + VAL(NCHDIM)
49C
50 DATA XV/0.05D0,0.50D0,0.95D0/
51 DATA ZQ/10.D0,100.D0,1000.D0,1.D+4,5.5D+5/
52 DATA P2/5./
53 DATA IP2/0/
54 DATA FLAV/4.D0/
55 DATA ALQED/137.D0/
56 DATA ICALL/0/
57C
58 N6 = L6
59 IFLPRT = LFLPRT
60C
61C*****adjustment of the VDM contribution*******************************
62 KA=1.
63C*****mass of the charm quark******************************************
64 CM=1.41
65C*****CHARME=0. -> no charm contribution ******************************
66 CHARME=1.
67C
68 PI=4.D0*ATAN(1.D0)
69 PI2=PI**2
70 CF=4.D0/3.D0
71 NF=INT(FLAV+0.1D0)
72 IF(NF.EQ.0) NF=3
73 FLAVOR=FLAV
74 B0=11.D0-2.D0*NF/3.D0
75 B1=102.D0-38.D0*NF/3.D0
76 CCOEG=2.D0/9.D0
77C IF(NF.EQ.4) CCOEG=5.D0/18.D0
78C COEG=2.D0*FLAVOR*CCOEG
79 COEG=2.D0*FLAVOR*CCOEG
80 CALL WATE32
81C
82C First call to PDFSET to initialize COMMON/W505120/
83 PARM(1) = 'Init0'
84 VAL(1) = 0.D0
85 CALL PDFSET(PARM,VAL)
86C.
87C Test new PDFLIB versions (4.0 or bigger) for Photons only
88 NPTYPE = 3
89 DO KGRO = 1,NGRMAX
90 IF(NPGSMX(NPTYPE,KGRO) .EQ. 0) GOTO 500
91 DO ISET=1,NPGSMX(NPTYPE,KGRO)
92 WRITE (N6,*) ' ==========================================
93 +============================================'
94 FIRST=.TRUE.
95 PARM(1) = 'Nptype'
96 VAL(1) = NPTYPE
97 PARM(2) = 'Ngroup'
98 VAL(2) = KGRO
99 PARM(3) = 'Nset'
100 VAL(3) = ISET
101 CALL PDFSET(PARM,VAL)
102C
103 ICALL = 0
104 Q02 = Q2MIN
105 OWLAM = QCDL4
106 OWLAM2=OWLAM**2
107 IORD = LO - 1
108*
109 DO 100 J=3,3
110 Q2=Q02
111 IF(J.GE.2) Q2=ZQ(J-1)
112 XTH=1.D0/(1.D0+4.D0*CM**2/Q2)
113 ALQ2= LOG(Q2/OWLAM2)
114 ALFPI= 2.D0 /(B0*ALQ2+B1* LOG(ALQ2)/B0)
115 DO 70 K=1,3
116 X=XV(K)
117 DX = X
118 Q = SQRT(Q2)
119 DQ = Q
120 DQ2 = Q2
121 DP2 = P2
122 IP = IP2
123 CUT=1.
124 IF(CHARME.LT.0.5) CUT=0.
125 CUTG=1.
126 IF(X.GT.XTH) CUT=0.
127 CALL STRUCTP(DX,DQ2,DP2,IP,
128 + DUV,DDV,DUB,DDB,DSB,DCB,DBB,DTB,DGL)
129 UB =DUB
130 DB =DDB
131 SB =DSB
132 CB =DCB
133 GL =DGL
134 F2=(4.D0* DUB + DDB + DSB)/9.D0
135 F2C=4.D0/9.D0*(FLAVOR-3.D0)*DCB*CUT
136 F2=F2+F2C
137 IF(ICALL.EQ.0) THEN
138 ICALL = 1
139 WRITE (N6,1000) Q02,P2,CHARME,CUT,IORD,OWLAM,FLAV
140 1000 FORMAT(1X,' Q02= ',F7.3,' P2= ',F7.3,
141 + ' CHARM= ',F3.1,' CUT= ',F3.1,
142 + ' IORD= ',I2,' LAMBDA=',F7.4,' NF = ',F5.2)
143 ENDIF
144 IF (K.EQ.1) THEN
145 WRITE (N6,1001) Q2
146 1001 FORMAT(/,' Q2= ',E10.3,' GEV**2')
147 WRITE(N6,1002)
148 1002 FORMAT(/,4X,' X',6X,'X*UB ',6X,'X*DB ',6X,'X*SB ',6X,'X*CB '
149 + ,6X,'X*GL',8X,' F2 ',6X,' F2/ALPHA'
150 + ,5X,' F2C ',5X,' F2C/ALPHA')
151 ENDIF
152 IF(IORD)13,13,14
15314 CONTINUE
154 AL=0.5D0*ALFPI
155 AL1= LOG(1.D0-X)
156 XQ=F2+F2*AL*CF*(-9.D0-2.D0*PI2/3.D0+AL1*(-3.D0+2.D0*AL1))
157C WRITE(N6,1111) X,Q,F2,AL1,XQ
158C1111 FORMAT(1X,' X,F2 = ',5E13.5)
159 XM=1.-X
160 XP=1.+X
161 DIS2=(XM**2-4.*X*XM*CM**2/Q2)*CUT
162 DIS=SQRT(DIS2)
163 YP=(XP+DIS)/2.
164 YM=(XP-DIS)/2.
165 CUTY=1.
166 DO 81 I=1,NTERMS
167 Y=0.5D0*(1.D0-X)*XI(I)+0.5D0*(1.D0+X)
168 XY=X/Y
169 AL1= LOG(1.D0-Y)
170 DX = XY
171 CALL STRUCTP(DX,DQ2,DP2,IP,
172 + DUV,DDV,DUB,DDB,DSB,DCB,DBB,DTB,DGL)
173 XQQ=(4.D0* DUB + DDB + DSB)/9.D0
174 XQQ=XQQ+4.D0/9.D0*(FLAVOR-3.D0)*DCB*CUT*CUTY
175 F2A=F2+F2C*(CUTY-1.)
176 6 C22=CF*(6.D0+4.D0*Y-2.D0*(1.D0+Y*Y)/
177 + (1.D0-Y)* LOG(Y)-2.D0*(1.D0+Y)*AL1)
178 C23=CF*(-3.D0+4.D0*AL1)/(1.D0-Y)
179 COEGM=COEG+(8./9.)*(FLAVOR-3.)*CUTG*CUT
180 CG2=(-1.D0+8.D0*Y*(1.D0-Y)+(1.D0-2.D0*Y+2.D0*Y*Y)*
181 + LOG(1.D0/Y-1.D0))*COEGM
182 XQ=XQ +0.5D0*(1.D0-X)*WI(I)*AL*(C22*XQQ+C23*(XQQ- F2A))
183 XQ=XQ +0.5D0*(1.D0-X)*WI(I)*AL*CG2*(DGL+KA*GL)
184C WRITE(N6,1112) Y,AL1,C22,C23,CG2,XQQ,XQ
185C1112 FORMAT(1X,' Y,C22 = ',7E13.5)
186 CUTG=1.
187 81 CUTY=1.
188 COE3=3.D0*3.D0*(2.D0/27.D0)*(1.D0/(2.D0*PI*ALQED))*2.D0
189 COE4=3.D0*(34.D0/81.D0)*(1.D0/(2.D0*PI*ALQED))*2.D0
190 IF(NF.EQ.3) COE4=COE3
191 F2=XQ+COE4*(8.D0*X*(1.D0-X)-1.D0+(1.D0-2.D0*X+2.D0*X*X)*
192 + LOG(1.D0/X-1.D0))*X
193 F2M=XQ+COE3*(8.D0*X*(1.D0-X)-1.D0+(1.D0-2.D0*X+2.D0*X*X)*
194 + LOG(1.D0/X-1.D0))*X
195 CMS=CM**2
196 SC=Q2*(1.D0-X)/X
197 BE=4.*CMS/SC
198 IF(BE.GE.1.) WCM=0.
199 IF(BE.GE.1.) GO TO 91
200 SQ=SQRT(1.-BE)
201 A1=((1.D0+SQ)/2.D0)**2
202 A2=(1.D0-X)/X
203 WCM=(8.D0*(1.D0-X)*X-1.D0)*SQ+(X**2+(1.D0-X)**2)*LOG(A1*A2)
204 WCM=3.D0*(4.D0/9.D0)/(PI*ALQED)*X*WCM
20591 CONTINUE
206 F2M=F2M+(4.D0/9.D0)*(FLAVOR-3.D0)*WCM*CUT
207 F2C=F2M
208 13 F2N=F2*ALQED
209 F2CN=F2C*ALQED
210 WRITE(N6,1003)X,UB,DB,SB,CB,GL,F2,F2N,F2C,F2CN
211 1003 FORMAT(1X,' ',F6.3,9E12.4)
212 70 CONTINUE
213 100 CONTINUE
214 ENDDO
215 WRITE(N6,*) ' '
216 500 CONTINUE
217 ENDDO
218 STOP
219 END