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0795afa3 | 1 | #include "isajet/pilot.h" |
2 | REAL*8 FUNCTION ZJJ3(P1, P2, P3, P4, P5,NHEL,IM) | |
3 | C | |
4 | C Function generated by Madgraph + hand coding | |
5 | C Returns amplitude squared summed/ave over colors | |
6 | C for the point in phase space P1,P2,P3,P4,P5 | |
7 | C and helicity NHEL(1)... | |
8 | C for the process: q(im) qb(im) -> z g g | |
9 | C with Madgraph code IM | |
10 | C | |
11 | #if defined(CERNLIB_IMPNONE) | |
12 | IMPLICIT NONE | |
13 | #endif | |
14 | C | |
15 | C CONSTANTS | |
16 | C | |
17 | INTEGER NGRAPHS, NEIGEN, NEXTERNAL | |
18 | PARAMETER (NGRAPHS= 8,NEIGEN= 2,NEXTERNAL=5) | |
19 | REAL*8 ZERO | |
20 | PARAMETER (ZERO=0D0) | |
21 | C | |
22 | C ARGUMENTS | |
23 | C | |
24 | REAL*8 P1(0:3),P2(0:3),P3(0:3),P4(0:3),P5(0:3) | |
25 | INTEGER NHEL(NEXTERNAL),IM | |
26 | C | |
27 | C LOCAL VARIABLES | |
28 | C | |
29 | INTEGER I,J | |
30 | REAL*8 EIGEN_VAL(NEIGEN), EIGEN_VEC(NGRAPHS,NEIGEN) | |
31 | COMPLEX*16 ZTEMP | |
32 | COMPLEX*16 AMP(NGRAPHS) | |
33 | COMPLEX*16 W1(6) , W2(6) , W3(6) , W4(6) , W5(6) | |
34 | COMPLEX*16 W6(6) , W7(6) , W8(6) , W9(6) , W10(6) | |
35 | COMPLEX*16 W11(6) , W12(6) , W13(6) , W14(6) , W15(6) | |
36 | REAL*8 GZUD(2) | |
37 | C | |
38 | C GLOBAL VARIABLES | |
39 | C | |
40 | #include "isajet/mgcoms.inc" | |
41 | C | |
42 | C COLOR DATA | |
43 | C | |
44 | DATA EIGEN_VAL(1 )/ 7.7777777777777746D-01 / | |
45 | DATA EIGEN_VEC(1 ,1 )/ -4.0824829046386302D-01 / | |
46 | DATA EIGEN_VEC(2 ,1 )/ -4.0824829046386307D-01 / | |
47 | DATA EIGEN_VEC(3 ,1 )/ 0.0000000000000000D+00 / | |
48 | DATA EIGEN_VEC(4 ,1 )/ -4.0824829046386307D-01 / | |
49 | DATA EIGEN_VEC(5 ,1 )/ -4.0824829046386302D-01 / | |
50 | DATA EIGEN_VEC(6 ,1 )/ -4.0824829046386307D-01 / | |
51 | DATA EIGEN_VEC(7 ,1 )/ 0.0000000000000000D+00 / | |
52 | DATA EIGEN_VEC(8 ,1 )/ -4.0824829046386302D-01 / | |
53 | DATA EIGEN_VAL(2 )/ 2.3333333333333321D+00 / | |
54 | DATA EIGEN_VEC(1 ,2 )/ 2.6726124191242445D-01 / | |
55 | DATA EIGEN_VEC(2 ,2 )/ -2.6726124191242440D-01 / | |
56 | DATA EIGEN_VEC(3 ,2 )/ -5.3452248382484879D-01 / | |
57 | DATA EIGEN_VEC(4 ,2 )/ -2.6726124191242440D-01 / | |
58 | DATA EIGEN_VEC(5 ,2 )/ 2.6726124191242445D-01 / | |
59 | DATA EIGEN_VEC(6 ,2 )/ -2.6726124191242440D-01 / | |
60 | DATA EIGEN_VEC(7 ,2 )/ -5.3452248382484879D-01 / | |
61 | DATA EIGEN_VEC(8 ,2 )/ 2.6726124191242445D-01 / | |
62 | C ---------- | |
63 | C BEGIN CODE | |
64 | C ---------- | |
65 | IF(IM.EQ.4.OR.IM.EQ.8.OR.IM.EQ.12) THEN | |
66 | GZUD(1)=GZD(1) | |
67 | GZUD(2)=GZD(2) | |
68 | ELSE | |
69 | GZUD(1)=GZU(1) | |
70 | GZUD(2)=GZU(2) | |
71 | ENDIF | |
72 | C | |
73 | CALL IXXXXX(P1 ,FMASS(IM),NHEL(1 ), 1,W1 ) | |
74 | CALL OXXXXX(P2 ,FMASS(IM),NHEL(2 ),-1,W2 ) | |
75 | CALL VXXXXX(P3 ,ZMASS,NHEL(3 ), 1,W3 ) | |
76 | CALL VXXXXX(P4 , ZERO,NHEL(4 ), 1,W4 ) | |
77 | CALL VXXXXX(P5 , ZERO,NHEL(5 ), 1,W5 ) | |
78 | CALL FVOXXX(W2 ,W3 ,GZUD,FMASS(IM),FWIDTH(IM),W6 ) | |
79 | CALL FVOXXX(W6 ,W4 ,GG,FMASS(IM),FWIDTH(IM),W7 ) | |
80 | CALL IOVXXX(W1 ,W7 ,W5 ,GG,AMP(1 )) | |
81 | CALL FVIXXX(W1 ,W4 ,GG,FMASS(IM),FWIDTH(IM),W8 ) | |
82 | CALL FVOXXX(W2 ,W5 ,GG,FMASS(IM),FWIDTH(IM),W9 ) | |
83 | CALL IOVXXX(W8 ,W9 ,W3 ,GZUD,AMP(2 )) | |
84 | CALL JIOXXX(W1 ,W6 ,GG,ZERO,ZERO,W10 ) | |
85 | CALL GGGXXX(W5 ,W4 ,W10 ,G,AMP(3 )) | |
86 | CALL IOVXXX(W8 ,W6 ,W5 ,GG,AMP(4 )) | |
87 | CALL FVOXXX(W2 ,W4 ,GG,FMASS(IM),FWIDTH(IM),W11 ) | |
88 | CALL FVIXXX(W1 ,W5 ,GG,FMASS(IM),FWIDTH(IM),W12 ) | |
89 | CALL IOVXXX(W12 ,W11 ,W3 ,GZUD,AMP(5 )) | |
90 | CALL FVIXXX(W1 ,W3 ,GZUD,FMASS(IM),FWIDTH(IM),W13 ) | |
91 | CALL FVIXXX(W13 ,W4 ,GG,FMASS(IM),FWIDTH(IM),W14 ) | |
92 | CALL IOVXXX(W14 ,W2 ,W5 ,GG,AMP(6 )) | |
93 | CALL JIOXXX(W13 ,W2 ,GG,ZERO,ZERO,W15 ) | |
94 | CALL GGGXXX(W5 ,W4 ,W15 ,G,AMP(7 )) | |
95 | CALL IOVXXX(W13 ,W11 ,W5 ,GG,AMP(8 )) | |
96 | ZJJ3 = 0.D0 | |
97 | DO I = 1, NEIGEN | |
98 | ZTEMP = (0.D0,0.D0) | |
99 | DO J = 1, NGRAPHS | |
100 | ZTEMP = ZTEMP + EIGEN_VEC(J,I)*AMP(J) | |
101 | ENDDO | |
102 | ZJJ3 =ZJJ3+ZTEMP*EIGEN_VAL(I)*CONJG(ZTEMP) | |
103 | ENDDO | |
104 | END |