| 1 | SUBROUTINE STRDEC
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| 2 |
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| 3 | C-----------------------------------------------------------------------
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| 4 | C STR(ANGE BARYON) DEC(AY)
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| 5 | C
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| 6 | C ROUTINE TREATES DECAY OF STRANGE BARYONS (LAMBDA, SIGMA, XI, OMEGA)
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| 7 | C DECAY WITH FULL KINEMATIC, ENERGY AND MOMENTA CONSERVED
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| 8 | C THIS SUBROUTINE IS CALLED FORM NUCINT
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| 9 | C
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| 10 | C DESIGN : D. HECK IK3 FZK KARLSRUHE
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| 11 | C-----------------------------------------------------------------------
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| 12 |
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| 13 | IMPLICIT NONE
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| 14 | *KEEP,IRET.
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| 15 | COMMON /IRET/ IRET1,IRET2
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| 16 | INTEGER IRET1,IRET2
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| 17 | *KEEP,PARPAR.
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| 18 | COMMON /PARPAR/ CURPAR,SECPAR,PRMPAR,OUTPAR,C,
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| 19 | * E00,E00PN,PTOT0,PTOT0N,THICKH,ITYPE,LEVL
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| 20 | DOUBLE PRECISION CURPAR(14),SECPAR(14),PRMPAR(14),OUTPAR(14),
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| 21 | * C(50),E00,E00PN,PTOT0,PTOT0N,THICKH
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| 22 | INTEGER ITYPE,LEVL
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| 23 | *KEEP,PARPAE.
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| 24 | DOUBLE PRECISION GAMMA,COSTHE,PHI,H,T,X,Y,CHI,BETA,GCM,ECM
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| 25 | EQUIVALENCE (CURPAR(2),GAMMA), (CURPAR(3),COSTHE),
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| 26 | * (CURPAR(4), PHI ), (CURPAR(5), H ),
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| 27 | * (CURPAR(6), T ), (CURPAR(7), X ),
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| 28 | * (CURPAR(8), Y ), (CURPAR(9), CHI ),
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| 29 | * (CURPAR(10),BETA), (CURPAR(11),GCM ),
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| 30 | * (CURPAR(12),ECM )
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| 31 | *KEEP,RANDPA.
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| 32 | COMMON /RANDPA/ FAC,U1,U2,RD,NSEQ,ISEED,KNOR
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| 33 | DOUBLE PRECISION FAC,U1,U2
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| 34 | REAL RD(3000)
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| 35 | INTEGER ISEED(103,10),NSEQ
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| 36 | LOGICAL KNOR
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| 37 | *KEEP,RUNPAR.
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| 38 | COMMON /RUNPAR/ FIXHEI,THICK0,HILOECM,HILOELB,
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| 39 | * STEPFC,NRRUN,NSHOW,PATAPE,MONIIN,
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| 40 | * MONIOU,MDEBUG,NUCNUC,
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| 41 | * CETAPE,
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| 42 | * SHOWNO,ISHW,NOPART,NRECS,NBLKS,MAXPRT,NDEBDL,
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| 43 | * N1STTR,MDBASE,
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| 44 | * DEBDEL,DEBUG,FDECAY,FEGS,FIRSTI,FIXINC,FIXTAR,
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| 45 | * FIX1I,FMUADD,FNKG,FPRINT,FDBASE
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| 46 | * ,GHEISH,GHESIG
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| 47 | COMMON /RUNPAC/ DSN,HOST,USER
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| 48 | DOUBLE PRECISION FIXHEI,THICK0,HILOECM,HILOELB
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| 49 | REAL STEPFC
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| 50 | INTEGER NRRUN,NSHOW,PATAPE,MONIIN,MONIOU,MDEBUG,NUCNUC,
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| 51 | * SHOWNO,ISHW,NOPART,NRECS,NBLKS,MAXPRT,NDEBDL,
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| 52 | * N1STTR,MDBASE
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| 53 | INTEGER CETAPE
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| 54 | CHARACTER*79 DSN
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| 55 | CHARACTER*20 HOST,USER
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| 56 |
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| 57 | LOGICAL DEBDEL,DEBUG,FDECAY,FEGS,FIRSTI,FIXINC,FIXTAR,
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| 58 | * FIX1I,FMUADD,FNKG,FPRINT,FDBASE
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| 59 | * ,GHEISH,GHESIG
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| 60 | *KEEP,STRBAR.
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| 61 | COMMON /STRBAR/ CSTRBA
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| 62 | DOUBLE PRECISION CSTRBA(11)
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| 63 | *KEND.
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| 64 |
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| 65 | INTEGER I,J
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| 66 | C-----------------------------------------------------------------------
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| 67 |
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| 68 | IF ( DEBUG ) WRITE(MDEBUG,444) (CURPAR(I),I=1,9)
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| 69 | 444 FORMAT(' STRDEC: CURPAR=',1P,9E10.3)
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| 70 |
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| 71 | C COPY COORDINATES INTO SECPAR
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| 72 | DO 1 J = 5,8
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| 73 | SECPAR(J) = CURPAR(J)
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| 74 | 1 CONTINUE
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| 75 |
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| 76 | IF ( ITYPE .EQ. 18 ) THEN
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| 77 | CALL RMMAR( RD,1,1 )
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| 78 | IF ( RD(1) .LT. CSTRBA(5) ) THEN
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| 79 | C DECAY LAMBDA ---> P + PI(-)
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| 80 | CALL DECAY1( ITYPE, 14, 9 )
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| 81 | ELSE
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| 82 | C DECAY LAMBDA ---> N + PI(0)
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| 83 | CALL DECAY1( ITYPE, 13, 7 )
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| 84 | ENDIF
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| 85 |
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| 86 | ELSEIF ( ITYPE .EQ. 19 ) THEN
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| 87 | CALL RMMAR( RD,1,1 )
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| 88 | IF ( RD(1) .LT. CSTRBA(6) ) THEN
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| 89 | C DECAY SIGMA(+) ---> P + PI(0)
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| 90 | CALL DECAY1( ITYPE, 14, 7 )
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| 91 | ELSE
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| 92 | C DECAY SIGMA(+) ---> N + PI(+)
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| 93 | CALL DECAY1( ITYPE, 13, 8 )
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| 94 | ENDIF
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| 95 |
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| 96 | ELSEIF ( ITYPE .EQ. 20 .OR. ITYPE .EQ. 28 ) THEN
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| 97 | C DECAY SIGMA(0) ---> LAMBDA + GAMMA
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| 98 | C DECAY ANTI-SIGMA(0) ---> ANTI-LAMBDA + GAMMA
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| 99 | CALL DECAY1( ITYPE, ITYPE-2, 1 )
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| 100 |
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| 101 | ELSEIF ( ITYPE .EQ. 21 ) THEN
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| 102 | C DECAY SIGMA(-) ---> N + PI(-)
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| 103 | CALL DECAY1( ITYPE, 13, 9 )
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| 104 |
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| 105 | ELSEIF ( ITYPE .EQ. 22 .OR. ITYPE .EQ. 30 ) THEN
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| 106 | C DECAY XI(0) ---> LAMBDA + PI(0)
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| 107 | C DECAY ANTI-XI(0) ---> ANTI-LAMBDA + PI(0)
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| 108 | CALL DECAY1( ITYPE, ITYPE-4, 7 )
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| 109 |
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| 110 | ELSEIF ( ITYPE .EQ. 23 ) THEN
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| 111 | C DECAY XI(-) ---> LAMBDA + PI(-)
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| 112 | CALL DECAY1( ITYPE, 18, 9 )
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| 113 |
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| 114 | ELSEIF ( ITYPE .EQ. 24 .OR. ITYPE .EQ. 32 ) THEN
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| 115 | CALL RMMAR( RD,1,1 )
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| 116 | IF ( RD(1) .LT. CSTRBA(10) ) THEN
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| 117 | C DECAY OMEGA(-) ---> LAMBDA + K(-)
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| 118 | C DECAY ANTI-OMEGA(+) ---> ANTI-LAMBDA + K(+)
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| 119 | CALL DECAY1( ITYPE, ITYPE-6, 15-ITYPE/8 )
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| 120 | ELSEIF ( RD(1) .LT. CSTRBA(11) ) THEN
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| 121 | C DECAY OMEGA(-) ---> XI(0) + PI(-)
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| 122 | C DECAY ANTI-OMEGA(+) ---> ANTI-XI(0) + PI(+)
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| 123 | CALL DECAY1( ITYPE, ITYPE-2, 12-ITYPE/8 )
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| 124 | ELSE
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| 125 | C DECAY OMEGA(-) ---> XI(-) + PI(0)
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| 126 | C DECAY ANTI-OMEGA(+) ---> ANTI-XI(+) + PI(0)
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| 127 | CALL DECAY1( ITYPE, ITYPE-1, 7 )
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| 128 | ENDIF
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| 129 |
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| 130 | ELSEIF ( ITYPE .EQ. 26 ) THEN
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| 131 | CALL RMMAR( RD,1,1 )
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| 132 | IF ( RD(1) .LT. CSTRBA(5) ) THEN
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| 133 | C DECAY ANTI-LAMBDA ---> ANTI-P + PI(+)
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| 134 | CALL DECAY1( ITYPE, 15, 8 )
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| 135 | ELSE
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| 136 | C DECAY ANTI-LAMBDA ---> ANTI-N + PI(0)
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| 137 | CALL DECAY1( ITYPE, 25, 7 )
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| 138 | ENDIF
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| 139 |
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| 140 | ELSEIF ( ITYPE .EQ. 27 ) THEN
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| 141 | CALL RMMAR( RD,1,1 )
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| 142 | IF ( RD(1) .LT. CSTRBA(6) ) THEN
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| 143 | C DECAY ANTI-SIGMA(-) ---> ANTI-P + PI(0)
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| 144 | CALL DECAY1( ITYPE, 15, 7 )
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| 145 | ELSE
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| 146 | C DECAY ANTI-SIGMA(-) ---> ANTI-N + PI(-)
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| 147 | CALL DECAY1( ITYPE, 25, 9 )
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| 148 | ENDIF
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| 149 |
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| 150 | ELSEIF ( ITYPE .EQ. 29 ) THEN
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| 151 | C DECAY ANTI-SIGMA(+) ---> ANTI-N + PI(+)
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| 152 | CALL DECAY1( ITYPE, 25, 8 )
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| 153 |
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| 154 | ELSEIF ( ITYPE .EQ. 31 ) THEN
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| 155 | C DECAY ANTI-XI(+) ---> ANTI-LAMBDA + PI(+)
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| 156 | CALL DECAY1( ITYPE, 26, 8 )
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| 157 |
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| 158 | ELSE
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| 159 | WRITE(MONIOU,*) 'STRDEC: UNFORESEEN PARTICLE CODE =',ITYPE
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| 160 | ENDIF
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| 161 | IRET1 = 1
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| 162 | RETURN
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| 163 | END
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