| 1 | SUBROUTINE LEPACX( ECMCE,SDMLOG,LEPART,IPART )
|
|---|
| 2 |
|
|---|
| 3 | C-----------------------------------------------------------------------
|
|---|
| 4 | C LE(ADING) PA(RTICLE) C(HARGE) (E)X(CHANGE)
|
|---|
| 5 | C
|
|---|
| 6 | C CONSIDERS CHARGE EXCHANGE POSSIBILITY OF (ANTI)LEADING PARTICLE
|
|---|
| 7 | C CONSIDERS RESONANCE EXCITATION WITHOUT/WITH CHARGE EXCHANGE
|
|---|
| 8 | C LASTPI INCREASED: CREATE ONE CHARGED PION FOR CHARGE CONSERVATION
|
|---|
| 9 | C LASTPI UNCHANGED: NO CHARGE EXCHANGE
|
|---|
| 10 | C LASTPI DECREASED: CANCEL ONE CHARGED PION FOR CHARGE CONSERVATION
|
|---|
| 11 | C NRESPC INCRESAED BY 1, IF PI(+-) WILL BE GENERATED BY RESON. DECAY
|
|---|
| 12 | C NRESPN INCRESAED BY 1, IF PI(0) WILL BE GENERATED BY RESON. DECAY
|
|---|
| 13 | C NCPLUS INCREASED BY 1, IF POSITIVE CHARGE IS CREATED
|
|---|
| 14 | C NCPLUS DECREASED BY 1, IF NEGATIVE CHARGE IS CREATED
|
|---|
| 15 | C THIS SUBROUTINE IS CALLED FROM HDPM
|
|---|
| 16 | C ARGUMENTS:
|
|---|
| 17 | C ECMCE = ENERGY FOR CHARGE EXCHANGE (ECMDPM OR ECMDIF)
|
|---|
| 18 | C SDMLOG = ELABLG FOR NSD, DMLOG FOR DIFFRACTION
|
|---|
| 19 | C LEPART = PARTICLE CODE OF (ANTI)LEADER EXCHANGING CHARGE
|
|---|
| 20 | C IPART = PARTICLE NUMBER IN ARRAY OF SECONDARY PARTICLES
|
|---|
| 21 | C = 1 FOR LEADER, = 2 FOR ANTI-LEADER
|
|---|
| 22 | C-----------------------------------------------------------------------
|
|---|
| 23 |
|
|---|
| 24 | IMPLICIT DOUBLE PRECISION (A-H,O-Z)
|
|---|
| 25 | *KEEP,CONST.
|
|---|
| 26 | COMMON /CONST/ PI,PI2,OB3,TB3,ENEPER
|
|---|
| 27 | DOUBLE PRECISION PI,PI2,OB3,TB3,ENEPER
|
|---|
| 28 | *KEEP,LEPAR.
|
|---|
| 29 | COMMON /LEPAR/ LEPAR1,LEPAR2,LASTPI,NRESPC,NRESPN,NCPLUS
|
|---|
| 30 | INTEGER LEPAR1,LEPAR2,LASTPI,NRESPC,NRESPN,NCPLUS
|
|---|
| 31 | *KEEP,RANDPA.
|
|---|
| 32 | COMMON /RANDPA/ FAC,U1,U2,RD,NSEQ,ISEED,KNOR
|
|---|
| 33 | DOUBLE PRECISION FAC,U1,U2
|
|---|
| 34 | REAL RD(3000)
|
|---|
| 35 | INTEGER ISEED(103,10),NSEQ
|
|---|
| 36 | LOGICAL KNOR
|
|---|
| 37 | *KEEP,RESON.
|
|---|
| 38 | COMMON /RESON/ RDRES,RESRAN,IRESPAR
|
|---|
| 39 | REAL RDRES(2),RESRAN(1000)
|
|---|
| 40 | INTEGER IRESPAR
|
|---|
| 41 |
|
|---|
| 42 | *KEEP,RUNPAR.
|
|---|
| 43 | COMMON /RUNPAR/ FIXHEI,THICK0,HILOECM,HILOELB,
|
|---|
| 44 | * STEPFC,NRRUN,NSHOW,PATAPE,MONIIN,
|
|---|
| 45 | * MONIOU,MDEBUG,NUCNUC,
|
|---|
| 46 | * CETAPE,
|
|---|
| 47 | * SHOWNO,ISHW,NOPART,NRECS,NBLKS,MAXPRT,NDEBDL,
|
|---|
| 48 | * N1STTR,MDBASE,
|
|---|
| 49 | * DEBDEL,DEBUG,FDECAY,FEGS,FIRSTI,FIXINC,FIXTAR,
|
|---|
| 50 | * FIX1I,FMUADD,FNKG,FPRINT,FDBASE
|
|---|
| 51 | * ,GHEISH,GHESIG
|
|---|
| 52 | COMMON /RUNPAC/ DSN,HOST,USER
|
|---|
| 53 | DOUBLE PRECISION FIXHEI,THICK0,HILOECM,HILOELB
|
|---|
| 54 | REAL STEPFC
|
|---|
| 55 | INTEGER NRRUN,NSHOW,PATAPE,MONIIN,MONIOU,MDEBUG,NUCNUC,
|
|---|
| 56 | * SHOWNO,ISHW,NOPART,NRECS,NBLKS,MAXPRT,NDEBDL,
|
|---|
| 57 | * N1STTR,MDBASE
|
|---|
| 58 | INTEGER CETAPE
|
|---|
| 59 | CHARACTER*79 DSN
|
|---|
| 60 | CHARACTER*20 HOST,USER
|
|---|
| 61 |
|
|---|
| 62 | LOGICAL DEBDEL,DEBUG,FDECAY,FEGS,FIRSTI,FIXINC,FIXTAR,
|
|---|
| 63 | * FIX1I,FMUADD,FNKG,FPRINT,FDBASE
|
|---|
| 64 | * ,GHEISH,GHESIG
|
|---|
| 65 | *KEND.
|
|---|
| 66 |
|
|---|
| 67 | C-----------------------------------------------------------------------
|
|---|
| 68 |
|
|---|
| 69 | IF ( DEBUG ) WRITE(MDEBUG,*) 'LEPACX: LEPART=',LEPART
|
|---|
| 70 |
|
|---|
| 71 | C SET PROBABILITIES FOR RESONANCE PRODUCTION (PRESPR) AND FOR
|
|---|
| 72 | C CHARGE EXCHANGE OR RESONANCE PRODUCTION (PCEXRS)
|
|---|
| 73 | IF ( ECMCE .LE. 19.4D0 ) THEN
|
|---|
| 74 | PCEXRS = 0.45D0
|
|---|
| 75 | PRESPR = 0.35D0
|
|---|
| 76 | ELSEIF ( ECMCE .LT. 968.5D0 ) THEN
|
|---|
| 77 | PCEXRS = 0.45D0 + 0.034509D0 * (SDMLOG - 5.29832D0)
|
|---|
| 78 | PRESPR = 0.0881897D0 * (SDMLOG - 5.29832D0)
|
|---|
| 79 | ELSE
|
|---|
| 80 | PCEXRS = 0.72D0
|
|---|
| 81 | PRESPR = 0.69D0
|
|---|
| 82 | ENDIF
|
|---|
| 83 | PRESPR = MAX( 0.35D0, PRESPR )
|
|---|
| 84 | IF ( LEPART .EQ. 7 ) THEN
|
|---|
| 85 | C ASSUME 50% CHARGE EXCHANGE FOR GAMMA INITIATED INTERACTION
|
|---|
| 86 | PCEXRS = 0.5D0
|
|---|
| 87 | PRESPR = 0.D0
|
|---|
| 88 | ENDIF
|
|---|
| 89 |
|
|---|
| 90 | C THROW RANDOM NUMBER TO LOOK FOR RES. PRODUCTION OR CHARGE EXCHANGE
|
|---|
| 91 | CALL RMMAR( RD,2,1 )
|
|---|
| 92 |
|
|---|
| 93 | C - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
|---|
| 94 | C RESONANCE IS FORMED. IF ADDITIONAL CHARGE EXCHANGE, THEN SET LASTPI
|
|---|
| 95 | IF ( RD(1) .LE. PRESPR ) THEN
|
|---|
| 96 |
|
|---|
| 97 | C FIRST FOR NUCLEONS (AS MOST FREQUENT)
|
|---|
| 98 | IF ( LEPART .EQ. 13 ) THEN
|
|---|
| 99 | IF ( RD(2) .LE. 0.5 ) THEN
|
|---|
| 100 | C NEUTRON ----> DELTA(-)
|
|---|
| 101 | LEPART = 57
|
|---|
| 102 | NRESPC = NRESPC + 1
|
|---|
| 103 | NCPLUS = NCPLUS - 1
|
|---|
| 104 | ELSEIF ( RD(2) .GT. TB3 ) THEN
|
|---|
| 105 | C NEUTRON ----> DELTA(0)
|
|---|
| 106 | LEPART = 56
|
|---|
| 107 | CALL RMMAR( RDRES(IPART),1,1 )
|
|---|
| 108 | IF ( RDRES(IPART) .LE. TB3 ) THEN
|
|---|
| 109 | NRESPN = NRESPN + 1
|
|---|
| 110 | ELSE
|
|---|
| 111 | NRESPC = NRESPC + 1
|
|---|
| 112 | LASTPI = LASTPI - 1
|
|---|
| 113 | ENDIF
|
|---|
| 114 | ELSE
|
|---|
| 115 | C NEUTRON ----> DELTA(+)
|
|---|
| 116 | LEPART = 55
|
|---|
| 117 | CALL RMMAR( RDRES(IPART),1,1 )
|
|---|
| 118 | IF ( RDRES(IPART) .LE. TB3 ) THEN
|
|---|
| 119 | NRESPN = NRESPN + 1
|
|---|
| 120 | LASTPI = LASTPI - 1
|
|---|
| 121 | ELSE
|
|---|
| 122 | NRESPC = NRESPC + 1
|
|---|
| 123 | ENDIF
|
|---|
| 124 | NCPLUS = NCPLUS + 1
|
|---|
| 125 | ENDIF
|
|---|
| 126 | ELSEIF ( LEPART .EQ. 14 ) THEN
|
|---|
| 127 | IF ( RD(2) .LE. 0.5 ) THEN
|
|---|
| 128 | C PROTON ----> DELTA(++)
|
|---|
| 129 | LEPART = 54
|
|---|
| 130 | NRESPC = NRESPC + 1
|
|---|
| 131 | NCPLUS = NCPLUS + 1
|
|---|
| 132 | ELSEIF ( RD(2) .GT. TB3 ) THEN
|
|---|
| 133 | C PROTON ----> DELTA(+)
|
|---|
| 134 | LEPART = 55
|
|---|
| 135 | CALL RMMAR( RDRES(IPART),1,1 )
|
|---|
| 136 | IF ( RDRES(IPART) .LE. TB3 ) THEN
|
|---|
| 137 | NRESPN = NRESPN + 1
|
|---|
| 138 | ELSE
|
|---|
| 139 | NRESPC = NRESPC + 1
|
|---|
| 140 | LASTPI = LASTPI + 1
|
|---|
| 141 | ENDIF
|
|---|
| 142 | ELSE
|
|---|
| 143 | C PROTON ----> DELTA(0)
|
|---|
| 144 | LEPART = 56
|
|---|
| 145 | CALL RMMAR( RDRES(IPART),1,1 )
|
|---|
| 146 | IF ( RDRES(IPART) .LE. TB3 ) THEN
|
|---|
| 147 | NRESPN = NRESPN + 1
|
|---|
| 148 | LASTPI = LASTPI + 1
|
|---|
| 149 | ELSE
|
|---|
| 150 | NRESPC = NRESPC + 1
|
|---|
| 151 | ENDIF
|
|---|
| 152 | NCPLUS = NCPLUS - 1
|
|---|
| 153 | ENDIF
|
|---|
| 154 |
|
|---|
| 155 | C NOW FOR PIONS
|
|---|
| 156 | ELSEIF ( LEPART .EQ. 8 .OR. LEPART .EQ. 9 ) THEN
|
|---|
| 157 | IF ( RD(2) .LE. 0.5 ) THEN
|
|---|
| 158 | C PI(+-) ----> RHO(+-)
|
|---|
| 159 | LEPART = LEPART + 44
|
|---|
| 160 | NRESPN = NRESPN + 1
|
|---|
| 161 | ELSE
|
|---|
| 162 | C PI(+-) ----> RHO(0) ( ----> PI(+) + PI(-) )
|
|---|
| 163 | NCPLUS = NCPLUS + 2 * LEPART - 17
|
|---|
| 164 | LEPART = 51
|
|---|
| 165 | NRESPC = NRESPC + 1
|
|---|
| 166 | ENDIF
|
|---|
| 167 |
|
|---|
| 168 | C NOW FOR KAONS
|
|---|
| 169 | ELSEIF ( LEPART .EQ. 11 .OR. LEPART .EQ. 12 ) THEN
|
|---|
| 170 | IF ( RD(2) .LE. 0.5 ) THEN
|
|---|
| 171 | C K(+-) ----> K*(+-)
|
|---|
| 172 | LEPART = LEPART + 52
|
|---|
| 173 | CALL RMMAR( RDRES(IPART),1,1 )
|
|---|
| 174 | IF ( RDRES(IPART) .LE. TB3 ) THEN
|
|---|
| 175 | NRESPN = NRESPN + 1
|
|---|
| 176 | ELSE
|
|---|
| 177 | NRESPC = NRESPC + 1
|
|---|
| 178 | LASTPI = LASTPI + 1
|
|---|
| 179 | ENDIF
|
|---|
| 180 | ELSE
|
|---|
| 181 | C K(+) ----> K*(0)
|
|---|
| 182 | C K(-) ----> ANTI-K*(0)
|
|---|
| 183 | CALL RMMAR( RDRES(IPART),1,1 )
|
|---|
| 184 | NCPLUS = NCPLUS + 2 * LEPART - 23
|
|---|
| 185 | IF ( RDRES(IPART) .LE. TB3 ) THEN
|
|---|
| 186 | NRESPC = NRESPC + 1
|
|---|
| 187 | ELSE
|
|---|
| 188 | NRESPN = NRESPN + 1
|
|---|
| 189 | LASTPI = LASTPI + 1
|
|---|
| 190 | ENDIF
|
|---|
| 191 | LEPART = 3*LEPART + 29
|
|---|
| 192 | ENDIF
|
|---|
| 193 | ELSEIF ( LEPART .EQ. 10 .OR. LEPART .EQ. 16 ) THEN
|
|---|
| 194 | IF ( RD(2) .LE. 0.5 ) THEN
|
|---|
| 195 | C K(0) ----> (ANTI) K*(0)
|
|---|
| 196 | CALL RMMAR( RD,1,1 )
|
|---|
| 197 | IF ( RD(1) .LE. 0.5 ) THEN
|
|---|
| 198 | LEPART = 62
|
|---|
| 199 | ELSE
|
|---|
| 200 | LEPART = 65
|
|---|
| 201 | ENDIF
|
|---|
| 202 | CALL RMMAR( RDRES(IPART),1,1 )
|
|---|
| 203 | IF ( RDRES(IPART) .LE. TB3 ) THEN
|
|---|
| 204 | NRESPC = NRESPC + 1
|
|---|
| 205 | LASTPI = LASTPI - 1
|
|---|
| 206 | ELSE
|
|---|
| 207 | NRESPN = NRESPN + 1
|
|---|
| 208 | ENDIF
|
|---|
| 209 | ELSE
|
|---|
| 210 | C K(0) ----> K*(+-)
|
|---|
| 211 | CALL RMMAR( RD,1,1 )
|
|---|
| 212 | IF ( RD(1) .LE. 0.5 ) THEN
|
|---|
| 213 | LEPART = 63
|
|---|
| 214 | NCPLUS = NCPLUS + 1
|
|---|
| 215 | ELSE
|
|---|
| 216 | LEPART = 64
|
|---|
| 217 | NCPLUS = NCPLUS - 1
|
|---|
| 218 | ENDIF
|
|---|
| 219 | CALL RMMAR( RDRES(IPART),1,1 )
|
|---|
| 220 | IF ( RDRES(IPART) .LE. TB3 ) THEN
|
|---|
| 221 | NRESPN = NRESPN + 1
|
|---|
| 222 | LASTPI = LASTPI - 1
|
|---|
| 223 | ELSE
|
|---|
| 224 | NRESPC = NRESPC + 1
|
|---|
| 225 | ENDIF
|
|---|
| 226 | ENDIF
|
|---|
| 227 |
|
|---|
| 228 | C NOW FOR ANTINUCLEONS
|
|---|
| 229 | ELSEIF ( LEPART .EQ. 25 ) THEN
|
|---|
| 230 | IF ( RD(2) .LE. 0.5 ) THEN
|
|---|
| 231 | C ANTINEUTRON ----> ANTI-DELTA(0)
|
|---|
| 232 | LEPART = 60
|
|---|
| 233 | CALL RMMAR( RDRES(IPART),1,1 )
|
|---|
| 234 | IF ( RDRES(IPART) .LE. TB3 ) THEN
|
|---|
| 235 | NRESPN = NRESPN + 1
|
|---|
| 236 | ELSE
|
|---|
| 237 | NRESPC = NRESPC + 1
|
|---|
| 238 | LASTPI = LASTPI - 1
|
|---|
| 239 | ENDIF
|
|---|
| 240 | ELSEIF ( RD(2) .GT. TB3 ) THEN
|
|---|
| 241 | C ANTINEUTRON ----> ANTI-DELTA(+)
|
|---|
| 242 | LEPART = 61
|
|---|
| 243 | NRESPC = NRESPC + 1
|
|---|
| 244 | NCPLUS = NCPLUS + 1
|
|---|
| 245 | ELSE
|
|---|
| 246 | C ANTINEUTRON ----> ANTI-DELTA(-)
|
|---|
| 247 | LEPART = 59
|
|---|
| 248 | CALL RMMAR( RDRES(IPART),1,1 )
|
|---|
| 249 | IF ( RDRES(IPART) .LE. TB3 ) THEN
|
|---|
| 250 | NRESPN = NRESPN + 1
|
|---|
| 251 | LASTPI = LASTPI - 1
|
|---|
| 252 | ELSE
|
|---|
| 253 | NRESPC = NRESPC + 1
|
|---|
| 254 | ENDIF
|
|---|
| 255 | NCPLUS = NCPLUS - 1
|
|---|
| 256 | ENDIF
|
|---|
| 257 | ELSEIF ( LEPART .EQ. 15 ) THEN
|
|---|
| 258 | IF ( RD(2) .LE. 0.5 ) THEN
|
|---|
| 259 | C ANTIPROTON ----> ANTI-DELTA(--)
|
|---|
| 260 | LEPART = 58
|
|---|
| 261 | NRESPC = NRESPC + 1
|
|---|
| 262 | NCPLUS = NCPLUS - 1
|
|---|
| 263 | ELSEIF ( RD(2) .GT. TB3 ) THEN
|
|---|
| 264 | C ANTIPROTON ----> ANTI-DELTA(-)
|
|---|
| 265 | LEPART = 59
|
|---|
| 266 | CALL RMMAR( RDRES(IPART),1,1 )
|
|---|
| 267 | IF ( RDRES(IPART) .LE. TB3 ) THEN
|
|---|
| 268 | NRESPN = NRESPN + 1
|
|---|
| 269 | ELSE
|
|---|
| 270 | NRESPC = NRESPC + 1
|
|---|
| 271 | LASTPI = LASTPI + 1
|
|---|
| 272 | ENDIF
|
|---|
| 273 | ELSE
|
|---|
| 274 | C ANTIPROTON ----> ANTI-DELTA(0)
|
|---|
| 275 | LEPART = 60
|
|---|
| 276 | CALL RMMAR( RDRES(IPART),1,1 )
|
|---|
| 277 | IF ( RDRES(IPART) .LE. TB3 ) THEN
|
|---|
| 278 | NRESPN = NRESPN + 1
|
|---|
| 279 | LASTPI = LASTPI + 1
|
|---|
| 280 | ELSE
|
|---|
| 281 | NRESPC = NRESPC + 1
|
|---|
| 282 | ENDIF
|
|---|
| 283 | NCPLUS = NCPLUS + 1
|
|---|
| 284 | ENDIF
|
|---|
| 285 |
|
|---|
| 286 | ELSEIF ( LEPART .EQ. 7 ) THEN
|
|---|
| 287 | C NO RESONANCE FORMATION FOR INDUCING GAMMA RADIATION
|
|---|
| 288 | IF ( DEBUG ) WRITE(MDEBUG,*) 'LEPACX: NO EXCHANGE'
|
|---|
| 289 |
|
|---|
| 290 | ELSEIF ( (LEPART .GE. 18 .AND. LEPART .LE. 24) .OR.
|
|---|
| 291 | * (LEPART .GE. 26 .AND. LEPART .LE. 32) ) THEN
|
|---|
| 292 | C NO RESONANCE FORMATION FOR STRANGE BARYONS
|
|---|
| 293 | IF ( DEBUG ) WRITE(MDEBUG,*) 'LEPACX: NO EXCHANGE'
|
|---|
| 294 |
|
|---|
| 295 | ELSE
|
|---|
| 296 | WRITE(MONIOU,100) LEPART
|
|---|
| 297 | 100 FORMAT(1H ,'LEPACX: UNIDENTIFIED PARTICLE CODE= ',I4,
|
|---|
| 298 | * ' FOR RESONANCE FORMATION')
|
|---|
| 299 | ENDIF
|
|---|
| 300 | IF ( DEBUG ) WRITE(MDEBUG,102)
|
|---|
| 301 | * LEPART,LASTPI,NRESPC,NRESPN,NCPLUS
|
|---|
| 302 | 102 FORMAT(' LEPACX: LEPART,LASTPI,NRESPC,NRESPN,NCPLUS=',5I5)
|
|---|
| 303 |
|
|---|
| 304 | C - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
|---|
| 305 | C CHARGE EXCHANGE WITHOUT RESONANCE FORMATION
|
|---|
| 306 | ELSEIF ( RD(1) .LE. PCEXRS ) THEN
|
|---|
| 307 |
|
|---|
| 308 | C FIRST FOR NUCLEONS (AS MOST FREQUENT)
|
|---|
| 309 | IF ( LEPART .EQ. 13 ) THEN
|
|---|
| 310 | C NEUTRON ( + PI(+) ) ----> PROTON ( + PI(0) )
|
|---|
| 311 | LEPART = 14
|
|---|
| 312 | LASTPI = LASTPI - 1
|
|---|
| 313 | NCPLUS = NCPLUS + 1
|
|---|
| 314 | ELSEIF ( LEPART .EQ. 14 ) THEN
|
|---|
| 315 | C PROTON ( + PI(0) ) ----> NEUTRON ( + PI(+) )
|
|---|
| 316 | LEPART = 13
|
|---|
| 317 | LASTPI = LASTPI + 1
|
|---|
| 318 | NCPLUS = NCPLUS - 1
|
|---|
| 319 |
|
|---|
| 320 | C NOW FOR PIONS
|
|---|
| 321 | ELSEIF ( LEPART .EQ. 8 .OR. LEPART .EQ. 9 ) THEN
|
|---|
| 322 | C PI(+-) ----> PI(0)
|
|---|
| 323 | NCPLUS = NCPLUS + 2 * LEPART - 17
|
|---|
| 324 | LEPART = 7
|
|---|
| 325 | LASTPI = LASTPI + 1
|
|---|
| 326 |
|
|---|
| 327 | C NOW FOR KAONS
|
|---|
| 328 | ELSEIF ( LEPART .EQ. 11 .OR. LEPART .EQ. 12 ) THEN
|
|---|
| 329 | C K(+-) ----> K(0) (S OR L)
|
|---|
| 330 | NCPLUS = NCPLUS + 2 * LEPART - 23
|
|---|
| 331 | IF ( RD(2) .LE. 0.5 ) THEN
|
|---|
| 332 | LEPART = 10
|
|---|
| 333 | ELSE
|
|---|
| 334 | LEPART = 16
|
|---|
| 335 | ENDIF
|
|---|
| 336 | LASTPI = LASTPI + 1
|
|---|
| 337 | ELSEIF ( LEPART .EQ. 10 .OR. LEPART .EQ. 16 ) THEN
|
|---|
| 338 | C K(0) ----> K(+-)
|
|---|
| 339 | IF ( RD(2) .LE. 0.5 ) THEN
|
|---|
| 340 | LEPART = 11
|
|---|
| 341 | NCPLUS = NCPLUS + 1
|
|---|
| 342 | ELSE
|
|---|
| 343 | LEPART = 12
|
|---|
| 344 | NCPLUS = NCPLUS - 1
|
|---|
| 345 | ENDIF
|
|---|
| 346 | LASTPI = LASTPI - 1
|
|---|
| 347 |
|
|---|
| 348 | C NOW FOR ANTINUCLEONS
|
|---|
| 349 | ELSEIF ( LEPART .EQ. 25 ) THEN
|
|---|
| 350 | C ANTINEUTRON ( + PI(-) ) ----> ANTIPROTON ( + PI(0) )
|
|---|
| 351 | LEPART = 15
|
|---|
| 352 | LASTPI = LASTPI - 1
|
|---|
| 353 | NCPLUS = NCPLUS - 1
|
|---|
| 354 | ELSEIF ( LEPART .EQ. 15 ) THEN
|
|---|
| 355 | C ANTIPROTON ( + PI(0) ) ----> ANTINEUTRON ( + PI(-) )
|
|---|
| 356 | LEPART = 25
|
|---|
| 357 | LASTPI = LASTPI + 1
|
|---|
| 358 | NCPLUS = NCPLUS + 1
|
|---|
| 359 |
|
|---|
| 360 | C NOW FOR GAMMA INDUCED REACTIONS (ITYPE=7)
|
|---|
| 361 | ELSEIF ( LEPART .EQ. 7 ) THEN
|
|---|
| 362 | C TEST IF CHARGE EXCHANGE REACTION FOR PI(0)
|
|---|
| 363 | C PI(0) ----> PI(+-)
|
|---|
| 364 | IF ( RD(2) .LE. 0.5 ) THEN
|
|---|
| 365 | LEPART = 8
|
|---|
| 366 | NCPLUS = NCPLUS + 1
|
|---|
| 367 | ELSE
|
|---|
| 368 | LEPART = 9
|
|---|
| 369 | NCPLUS = NCPLUS - 1
|
|---|
| 370 | ENDIF
|
|---|
| 371 | LASTPI = LASTPI - 1
|
|---|
| 372 |
|
|---|
| 373 | ELSEIF ( (LEPART .GE. 18 .AND. LEPART .LE. 24) .OR.
|
|---|
| 374 | * (LEPART .GE. 26 .AND. LEPART .LE. 32) ) THEN
|
|---|
| 375 | C NO CHARGE EXCHANGE FOR STRANGE BARYONS
|
|---|
| 376 | IF ( DEBUG ) WRITE(MDEBUG,*) 'LEPACX: NO EXCHANGE'
|
|---|
| 377 |
|
|---|
| 378 | ELSE
|
|---|
| 379 | WRITE(MONIOU,101) LEPART
|
|---|
| 380 | 101 FORMAT(1H ,'LEPACX: UNIDENTIFIED PARTICLE CODE= ',I4,
|
|---|
| 381 | * ' FOR CHARGE EXCHANGE')
|
|---|
| 382 | ENDIF
|
|---|
| 383 | IF ( DEBUG ) WRITE(MDEBUG,*) 'LEPACX: LEPART,LASTPI,NCPLUS=',
|
|---|
| 384 | * LEPART,LASTPI,NCPLUS
|
|---|
| 385 | ELSE
|
|---|
| 386 | IF ( DEBUG ) WRITE(MDEBUG,*) 'LEPACX: NO EXCHANGE'
|
|---|
| 387 | ENDIF
|
|---|
| 388 |
|
|---|
| 389 | RETURN
|
|---|
| 390 | END
|
|---|
