Make-depend automatically generated if not there.

[u/mrichter/AliRoot.git] / PDF / spdf / hmrsgeb.F

*
* $Id$
*
* $Log$
* Revision 1.1.1.2  1996/10/30 08:28:49  cernlib
* Version 7.04
*
* Revision 1.1.1.1  1996/04/12 15:29:24  plothow
* Version 7.01
*
*
#include "pdf/pilot.h"
C-----------------------------------------------------------------------
      SUBROUTINE HMRSGEB(X,SCALE,MODE,UPV,DNV,SEA,STR,CHM,BOT,GL)
C***************************************************************C
C                                                               C
C            -----  VARIABLE GLUONS  ----                       C
C                                                               C
C     NEW VERSIONS !!!! JANUARY 1990  (AS DESCRIBED IN          C
C     "PARTON DISTRIBUTIONS ... " P.N. HARRIMAN, A.D. MARTIN,   C
C     R.G. ROBERTS AND W.J. STIRLING PREPRINT DTP-90-04 )       C
C                                                               C
C  MODE 1 CORRESPONDS TO  HARRIMAN,                             C
C  MARTIN, ROBERTS, STIRLING (EMC FIT)    WITH LAMBDA= 100 MEV  C
C  AND XG --> CONSTANT AS X--> 0 AT Q0**2                       C
C                                                               C
C  MODE 2 CORRESPONDS TO  HARRIMAN,                             C
C  MARTIN, ROBERTS, STIRLING (EMC FIT)    WITH LAMBDA= 100 MEV  C
C  AND XG --> X**0.5   AS X--> 0 AT Q0**2                       C
C                                                               C
C  MODE 3 CORRESPONDS TO  HARRIMAN,                             C
C  MARTIN, ROBERTS, STIRLING (EMC FIT)    WITH LAMBDA= 100 MEV  C
C  AND XG --> X**-0.5  AS X--> 0 AT Q0**2                       C
C                                                               C
C  MODE 4  CORRESPONDS TO HARRIMAN,                             C
C  MARTIN, ROBERTS, STIRLING (BCDMS FIT)  WITH LAMBDA= 190 MEV  C
C  AND XG --> CONSTANT AS X--> 0 AT Q0**2                       C
C                                                               C
C                                                               C
C                                                               C
C                         -*-                                   C
C                                                               C
C    (NOTE THAT X TIMES THE PARTON DISTRIBUTION FUNCTION        C
C    IS RETURNED I.E. G(X) = GLU/X ETC, AND THAT "SEA"          C
C    IS THE LIGHT QUARK SEA I.E. UBAR(X)=DBAR(X)                C
C    = SEA/X FOR A PROTON.  IF IN DOUBT, CHECK THE              C
C    MOMENTUM SUM RULE! NOTE ALSO THAT SCALE=Q IN GEV)          C
C                                                               C
C                         -*-                                   C
C                                                               C
C     (THE RANGE OF APPLICABILITY IS CURRENTLY:                 C
C     10**-5 < X < 1  AND  5 < Q**2 < 1.31 * 10**6              C
C     HIGHER Q**2 VALUES CAN BE SUPPLIED ON REQUEST             C
C     - PROBLEMS, COMMENTS ETC TO WJS@UK.AC.DUR.HEP             C
C                                                               C
C                                                               C
C***************************************************************C
#include "pdf/impdp.inc"
      IF(MODE.EQ.1) CALL STRH3E(X,SCALE,UPV,DNV,SEA,STR,CHM,BOT,GL)
      IF(MODE.EQ.2) CALL STRH3EP(X,SCALE,UPV,DNV,SEA,STR,CHM,BOT,GL)
      IF(MODE.EQ.3) CALL STRH3EM(X,SCALE,UPV,DNV,SEA,STR,CHM,BOT,GL)
      IF(MODE.EQ.4) CALL STRH3B(X,SCALE,UPV,DNV,SEA,STR,CHM,BOT,GL)
      RETURN
      END