5 * Revision 1.1.1.2 1996/10/30 08:29:19 cernlib
8 * Revision 1.1.1.1 1996/04/12 15:29:29 plothow
12 #include "pdf/pilot.h"
13 C----------------------------------------------------------------------
18 + GPSI(2:3),GAA(2:3),GPSIA(2:3),GAPSI(2:3),GMINUS(2:3),
19 1 AL(2:3),BET(2:3),GPLUS(2:3),
20 2 VNQ02(2:3),SNQ02(2:3),GNQ02(2:3)
22 *- sea quarks' momenta
23 PARAMETER (Q02=0.5,ALAM2=0.045*0.045)
25 DATA ZERO/0./,HALF/0.5/,ONE/1./,TWO/2./
26 DATA PTF/0.25/,PSF/0.75/
27 DATA IRAZ/0/, Q2OLD/-1./
32 S = LOG( LOG( MAX(Q02,Q2L)/ALAM2)/ LOG( Q02/ALAM2))
34 D1 = SNQ02(I)*EXP(-GPSI(I)*S)
35 D2PLUS=(ONE-AL(I))*(SNQ02(I)+VNQ02(I))-BET(I)*GNQ02(I)
36 D2MINU=AL(I)*(SNQ02(I)+VNQ02(I))+BET(I)*GNQ02(I)
37 D2 =D2PLUS*EXP(-GPLUS (I)*S) +
38 1 D2MINU*EXP(-GMINUS(I)*S) -
39 2 VNQ02(I)*EXP(-GPSI(I)*S)
40 SQ2(I)=PSF*D2 + PTF*D1
42 BSQ2=SQ2(2)/SQ2(3) - TWO
44 SEADIS=SQ2(2) * (ONE-XX)**BSQ2 * (BSQ2+ONE)