Lednicy's weights. Initial revision
[u/mrichter/AliRoot.git] / HBTAN / ltran12.F
CommitLineData
f5ab1a71 1
2 SUBROUTINE ltran12
3C==>calculating particle momentum in PRF {EE,PPX,PPY,PPZ} from
4C- the momentum of the first particle {E1,P1X,P1Y,P1Z) in NRF
5 IMPLICIT REAL*8 (A-H,O-Z)
6 COMMON/FSI_MOM/P1X,P1Y,P1Z,E1,P1, !part. momenta in NRF
7 1 P2X,P2Y,P2Z,E2,P2
8 COMMON/FSI_PRF/PPX,PPY,PPZ,AK,AKS,
9 1 X,Y,Z,T,RP,RPS
10 COMMON/FSI_POC/AMN,AM1,AM2,CN,C1,C2,AC1,AC2
11 COMMON/FSI_P12/P12X,P12Y,P12Z,E12,P12,AM12,EPM
12 COMMON/FSI_COOR/X1,Y1,Z1,T1,R1, !4-coord. of emis. points in NRF
13 1 X2,Y2,Z2,T2,R2
14 COMMON/FSI_CONS/PI,PI2,SPI,DR,W
15 COMMON/LEDWEIGHT/WEIF,WEI,WEIN,ITEST,IRANPOS
16
17
18C fm --> 1/GeV
19c write(*,*)'in LTRAN12 W', W
20c write(*,*)'in LTRAN12 p1x p1y p1z', P1X,P1Y,P1Z
21c write(*,*)'in LTRAN12 p2x p2y p2z', P2X,P2Y,P2Z
22c write(*,*)'in LTRAN12 x y z t', X,Y,Z,T
23c write(*,*)'in LTRAN12 x2 y2 z2', X2,Y2,Z2,T2
24
25CMLV
26 IF(IRANPOS.EQ.0)THEN
27 X1=X1*W
28 Y1=Y1*W
29 Z1=Z1*W
30 T1=T1*W
31 X2=X2*W
32 Y2=Y2*W
33 Z2=Z2*W
34 T2=T2*W
35C calculating Ri, Pi and Ei
36 R1=DSQRT(X1*X1+Y1*Y1+Z1*Z1)
37 R2=DSQRT(X2*X2+Y2*Y2+Z2*Z2)
38 ENDIF
39CMLV
40
41 P1S=P1X*P1X+P1Y*P1Y+P1Z*P1Z
42 P2S=P2X*P2X+P2Y*P2Y+P2Z*P2Z
43 P1=DSQRT(P1S)
44 P2=DSQRT(P2S)
45 E1=DSQRT(AM1*AM1+P1S)
46 E2=DSQRT(AM2*AM2+P2S)
47C-----------------------------------------------------------------------
48 E12=E1+E2
49 P12X=P1X+P2X
50 P12Y=P1Y+P2Y
51 P12Z=P1Z+P2Z
52 P12S=P12X**2+P12Y**2+P12Z**2
53 AM12=DSQRT(E12**2-P12S)
54 EPM=E12+AM12
55 P12=DSQRT(P12S)
56 P112=P1X*P12X+P1Y*P12Y+P1Z*P12Z
57 H1=(P112/EPM-E1)/AM12
58 PPX=P1X+P12X*H1
59 PPY=P1Y+P12Y*H1
60 PPZ=P1Z+P12Z*H1
61 EE=(E12*E1-P112)/AM12
62 AKS=EE**2-AM1**2
63 AK=DSQRT(AKS)
64CW WRITE(6,38)'AK ',AK,'K ',PPX,PPY,PPZ,EE
6538 FORMAT(A7,E11.4,A7,4E11.4)
66 RETURN
67 END
68