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0795afa3 | 1 | #include "isajet/pilot.h" |
2 | SUBROUTINE EVOLVE | |
3 | C---------------------------------------------------------------------- | |
4 | C- | |
5 | C- Purpose and Methods : | |
6 | C- Call for each process a subroutine to set up | |
7 | C- Lorentz frames and perform initial and final QCD jet | |
8 | C- evolution in leading-log approximation. | |
9 | C- | |
10 | C- Created 13-AUG-1991 Frank E. Paige,Serban D. Protopopescu | |
11 | C- | |
12 | C---------------------------------------------------------------------- | |
13 | #if defined(CERNLIB_IMPNONE) | |
14 | IMPLICIT NONE | |
15 | #endif | |
16 | #include "isajet/primar.inc" | |
17 | #include "isajet/jetpar.inc" | |
18 | #include "isajet/pjets.inc" | |
19 | #include "isajet/pinits.inc" | |
20 | #include "isajet/jetset.inc" | |
21 | #include "isajet/jwork.inc" | |
22 | #include "isajet/jwork2.inc" | |
23 | #include "isajet/keys.inc" | |
24 | #include "isajet/frame.inc" | |
25 | REAL BP,PINCOM | |
26 | INTEGER I,K,J,JJET,IFR | |
27 | C---------------------------------------------------------------------- | |
28 | C Initialize | |
29 | NJSET=0 | |
30 | N0JETS=0 | |
31 | N0W=0 | |
32 | N0PAIR=0 | |
33 | C | |
34 | C Copy momenta from /PINITS/ to /JETSET/ | |
35 | IF(.NOT.KEYS(2)) THEN | |
36 | DO 100 I=1,2 | |
37 | NJSET=NJSET+1 | |
38 | JORIG(NJSET)=JPACK*(10+I) | |
39 | JTYPE(NJSET)=IDINIT(I) | |
40 | JDCAY(NJSET)=JPACK*I+I | |
41 | DO 105 K=1,5 | |
42 | 105 PJSET(K,NJSET)=PINITS(K,I) | |
43 | 100 CONTINUE | |
44 | ENDIF | |
45 | C | |
46 | C Handle each process separately | |
47 | C | |
48 | IF(KEYS(1).OR.KEYS(8)) THEN | |
49 | CALL EVOL01 | |
50 | ELSEIF(KEYS(2)) THEN | |
51 | CALL EVOL02 | |
52 | ELSEIF(KEYS(3)) THEN | |
53 | CALL EVOL03 | |
54 | ELSEIF(KEYS(5)) THEN | |
55 | CALL EVOL05 | |
56 | ELSEIF(KEYS(6).OR.KEYS(10)) THEN | |
57 | CALL EVOL06 | |
58 | ELSEIF(KEYS(7).OR.KEYS(9)) THEN | |
59 | CALL EVOL07 | |
60 | ELSEIF(KEYS(11)) THEN | |
61 | CALL EVOL11 | |
62 | ELSEIF(KEYS(12)) THEN | |
63 | CALL EVOL01 | |
64 | ENDIF | |
65 | C | |
66 | IF(NJSET.LT.0) RETURN | |
67 | C | |
68 | C Boost /JETSET/ partons back to PP COM | |
69 | C | |
70 | DO 500 J=1,NJSET | |
71 | JJET=JORIG(J)/JPACK | |
72 | IF ( JJET.EQ.0 ) THEN | |
73 | IFR=1 | |
74 | ELSE | |
75 | IF(JJET.GT.10) GO TO 500 | |
76 | IF(IDJETS(JJET).EQ.10.AND.KEYS(6)) GO TO 500 | |
77 | IFR=IFRAME(JJET) | |
78 | ENDIF | |
79 | BP=0. | |
80 | DO 505 K=1,3 | |
81 | 505 BP=BP+FRAME(K,IFR)*PJSET(K,J) | |
82 | BP=BP/FRAME(5,IFR) | |
83 | DO 510 K=1,3 | |
84 | 510 PJSET(K,J)=PJSET(K,J)+FRAME(K,IFR)*PJSET(4,J)/FRAME(5,IFR) | |
85 | 1 +FRAME(K,IFR)*BP/(FRAME(4,IFR)+FRAME(5,IFR)) | |
86 | PJSET(4,J)=FRAME(4,IFR)*PJSET(4,J)/FRAME(5,IFR)+BP | |
87 | 500 CONTINUE | |
88 | C | |
89 | C Reset PBEAM | |
90 | DO 530 J=1,NJSET | |
91 | IF(JDCAY(J).EQ.JPACK*J+J) THEN | |
92 | JJET=JORIG(J)/JPACK-10 | |
93 | PINCOM=.5*(PJSET(4,J)+ABS(PJSET(3,J))) | |
94 | PBEAM(JJET)=HALFE-PINCOM | |
95 | ENDIF | |
96 | 530 CONTINUE | |
97 | C | |
98 | C Check for zero energy partons | |
99 | CALL IRMOV0 | |
100 | C | |
101 | RETURN | |
102 | END |