2 C*********************************************************************
6 C...Purpose: to provide various real-valued event related data.
7 COMMON/LUJETS/N,K(4000,5),P(4000,5),V(4000,5)
8 COMMON/LUDAT1/MSTU(200),PARU(200),MSTJ(200),PARJ(200)
9 COMMON/LUDAT2/KCHG(500,3),PMAS(500,4),PARF(2000),VCKM(4,4)
10 SAVE /LUJETS/,/LUDAT1/,/LUDAT2/
13 C...Set default value. For I = 0 sum of momenta or charges,
14 C...or invariant mass of system.
16 IF(I.LT.0.OR.I.GT.MSTU(4).OR.J.LE.0) THEN
17 ELSEIF(I.EQ.0.AND.J.LE.4) THEN
19 IF(K(I1,1).GT.0.AND.K(I1,1).LE.10) PLU=PLU+P(I1,J)
21 ELSEIF(I.EQ.0.AND.J.EQ.5) THEN
25 IF(K(I1,1).GT.0.AND.K(I1,1).LE.10) PSUM(J1)=PSUM(J1)+P(I1,J1)
28 PLU=SQRT(MAX(0.,PSUM(4)**2-PSUM(1)**2-PSUM(2)**2-PSUM(3)**2))
29 ELSEIF(I.EQ.0.AND.J.EQ.6) THEN
31 IF(K(I1,1).GT.0.AND.K(I1,1).LE.10) PLU=PLU+LUCHGE(K(I1,2))/3.
35 C...Direct readout of P matrix.
39 C...Charge, total momentum, transverse momentum, transverse mass.
41 IF(J.EQ.6) PLU=LUCHGE(K(I,2))/3.
42 IF(J.EQ.7.OR.J.EQ.8) PLU=P(I,1)**2+P(I,2)**2+P(I,3)**2
43 IF(J.EQ.9.OR.J.EQ.10) PLU=P(I,1)**2+P(I,2)**2
44 IF(J.EQ.11.OR.J.EQ.12) PLU=P(I,5)**2+P(I,1)**2+P(I,2)**2
45 IF(J.EQ.8.OR.J.EQ.10.OR.J.EQ.12) PLU=SQRT(PLU)
47 C...Theta and phi angle in radians or degrees.
49 IF(J.LE.14) PLU=ULANGL(P(I,3),SQRT(P(I,1)**2+P(I,2)**2))
50 IF(J.GE.15) PLU=ULANGL(P(I,1),P(I,2))
51 IF(J.EQ.14.OR.J.EQ.16) PLU=PLU*180./PARU(1)
53 C...True rapidity, rapidity with pion mass, pseudorapidity.
56 IF(J.EQ.17) PMR=P(I,5)
57 IF(J.EQ.18) PMR=ULMASS(211)
58 PR=MAX(1E-20,PMR**2+P(I,1)**2+P(I,2)**2)
59 PLU=SIGN(LOG(MIN((SQRT(PR+P(I,3)**2)+ABS(P(I,3)))/SQRT(PR),
62 C...Energy and momentum fractions (only to be used in CM frame).
64 IF(J.EQ.20) PLU=2.*SQRT(P(I,1)**2+P(I,2)**2+P(I,3)**2)/PARU(21)
65 IF(J.EQ.21) PLU=2.*P(I,3)/PARU(21)
66 IF(J.EQ.22) PLU=2.*SQRT(P(I,1)**2+P(I,2)**2)/PARU(21)
67 IF(J.EQ.23) PLU=2.*P(I,4)/PARU(21)
68 IF(J.EQ.24) PLU=(P(I,4)+P(I,3))/PARU(21)
69 IF(J.EQ.25) PLU=(P(I,4)-P(I,3))/PARU(21)