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Commit | Line | Data |
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fe4da5cc | 1 | * |
2 | * $Id$ | |
3 | * | |
4 | * $Log$ | |
5 | * Revision 1.1.1.2 1996/10/30 08:27:39 cernlib | |
6 | * Version 7.04 | |
7 | * | |
8 | * Revision 1.1.1.1 1996/04/12 15:29:04 plothow | |
9 | * Version 7.01 | |
10 | * | |
11 | * | |
12 | #include "pdf/pilot.h" | |
13 | SUBROUTINE BXF3 (X,QQ,XF3) | |
14 | C....................................................................... | |
15 | C. | |
16 | C. F3 (GIVES VALENCE FOR U AND D) | |
17 | C. | |
18 | C....................................................................... | |
19 | #include "pdf/impdp.inc" | |
20 | #include "pdf/expdp.inc" | |
21 | + BBETA | |
22 | DATA XLAM /0.47D00/, Q02/5.D0/ | |
23 | DATA ONED/1.D0/, FIVED2/5.2D0/ | |
24 | C | |
25 | S = LOG( LOG( MAX(FIVED2,QQ)/XLAM**2)/ LOG( Q02/XLAM**2)) | |
26 | ETA1=0.56D00-0.92D00*S*4.00D00/25.00D00 | |
27 | ETA2=2.71D00+5.08D00*S*4.00D00/25.00D00 | |
28 | XF3=(X**ETA1)*((ONED-X)**ETA2)/BBETA(ETA1,ONED+ETA2) | |
29 | XF3=3.0D00*XF3 | |
30 | RETURN | |
31 | END |