PDF/spdf/mrseb.F

   1 *
   2 * $Id$
   3 *
   4 * $Log$
   5 * Revision 1.1.1.2  1996/10/30 08:28:53  cernlib
   6 * Version 7.04
   7 *
   8 * Revision 1.1.1.1  1996/04/12 15:29:25  plothow
   9 * Version 7.01
  10 *
  11 *
  12 #include "pdf/pilot.h"
  13 C-----------------------------------------------------------------------
  14       SUBROUTINE MRSEB(X,SCALE,MODE,UPV,DNV,SEA,STR,CHM,BOT,GL)
  15 C***************************************************************C
  16 C                                                               C
  17 C  MODE 1 CORRESPONDS TO                                        C
  18 C  MARTIN, ROBERTS, STIRLING (EMC FIT)    WITH LAMBDA= 100 MEV  C
  19 C                                                               C
  20 C  MODE 2  CORRESPONDS TO                                       C
  21 C  MARTIN, ROBERTS, STIRLING (BCDMS FIT)  WITH LAMBDA= 200 MEV  C
  22 C                                                               C
  23 C  (  SOFT GLUE :  X G(X,Q0) = A (1-X)**5 )                     C
  24 C                                                               C
  25 C                         -*-                                   C
  26 C                                                               C
  27 C    (NOTE THAT X TIMES THE PARTON DISTRIBUTION FUNCTION        C
  28 C    IS RETURNED I.E. G(X) = GLU/X ETC, AND THAT "SEA"          C
  29 C    IS THE LIGHT QUARK SEA I.E. UBAR(X)=DBAR(X)=  ...          C
  30 C    = SEA/X FOR A PROTON.  IF IN DOUBT, CHECK THE              C
  31 C    MOMENTUM SUM RULE! NOTE ALSO THAT SCALE=Q IN GEV)          C
  32 C                                                               C
  33 C                         -*-                                   C
  34 C                                                               C
  35 C     (THE RANGE OF APPLICABILITY IS CURRENTLY:                 C
  36 C     10**-4 < X < 1  AND  5 < Q**2 < 1.31 * 10**6              C
  37 C     HIGHER Q**2 VALUES CAN BE SUPPLIED ON REQUEST             C
  38 C     - PROBLEMS, COMMENTS ETC TO SRG$T3@GEN                    C
  39 C                                                               C
  40 C                                                               C
  41 C***************************************************************C
  42 #include "pdf/impdp.inc"
  43       IF(MODE.EQ.1) CALL STRUCE(X,SCALE,UPV,DNV,SEA,STR,CHM,BOT,GL)
  44       IF(MODE.EQ.2) CALL STRUCB(X,SCALE,UPV,DNV,SEA,STR,CHM,BOT,GL)
  45       RETURN
  46       END