Adding macros to create Calibration objects
[u/mrichter/AliRoot.git] / HIJING / hijing1_36 / hijcrs.F
1 * $Id$
2 C
3 C
4 C
5 C
6         SUBROUTINE HIJCRS
7 C       THIS IS TO CALCULATE THE CROSS SECTIONS OF JET PRODUCTION AND
8 C       THE TOTAL INELASTIC CROSS SECTIONS.
9 #define BLANKET_SAVE
10 #include "hiparnt.inc"
11 #include "njet_hijing.inc"
12         EXTERNAL FHIN,FTOT,FNJET,FTOTJET,FTOTRIG
13         SAVE
14         IF(HINT1(1).GE.10.0) CALL CRSJET
15 C                       ********calculate jet cross section(in mb)
16 C
17         APHX1=HIPR1(6)*(IHNT2(1)**0.3333333-1.0)
18         APHX2=HIPR1(6)*(IHNT2(3)**0.3333333-1.0)
19         HINT1(11)=HINT1(14)-APHX1*HINT1(15)
20      &                  -APHX2*HINT1(16)+APHX1*APHX2*HINT1(17)
21         HINT1(10)=GAUSS1(FTOTJET,0.0,20.0,0.01)
22         HINT1(12)=GAUSS1(FHIN,0.0,20.0,0.01)
23         HINT1(13)=GAUSS1(FTOT,0.0,20.0,0.01)
24         HINT1(60)=HINT1(61)-APHX1*HINT1(62)
25      &                  -APHX2*HINT1(63)+APHX1*APHX2*HINT1(64)
26         HINT1(59)=GAUSS1(FTOTRIG,0.0,20.0,0.01)
27         IF(HINT1(59).EQ.0.0) HINT1(59)=HINT1(60)
28         IF(HINT1(1).GE.10.0) Then
29            DO 20 I=0,20
30               N=I
31               HINT1(80+I)=GAUSS1(FNJET,0.0,20.0,0.01)/HINT1(12)
32  20        CONTINUE
33         ENDIF
34         HINT1(10)=HINT1(10)*HIPR1(31)
35         HINT1(12)=HINT1(12)*HIPR1(31)
36         HINT1(13)=HINT1(13)*HIPR1(31)
37         HINT1(59)=HINT1(59)*HIPR1(31)
38 C               ********Total and Inel cross section are calculated
39 C                       by Gaussian integration.
40         IF(IHPR2(13).NE.0) THEN
41         HIPR1(33)=1.36*(1.0+36.0/HINT1(1)**2)
42      &             *ALOG(0.6+0.1*HINT1(1)**2)
43         HIPR1(33)=HIPR1(33)/HINT1(12)
44         ENDIF
45 C               ********Parametrized cross section for single
46 C                       diffractive reaction(Goulianos)
47         RETURN
48         END