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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 08:29:18 cernlib | |
6 | * Version 7.04 | |
7 | * | |
8 | * Revision 1.1.1.1 1996/04/12 15:29:29 plothow | |
9 | * Version 7.01 | |
10 | * | |
11 | * | |
12 | #include "pdf/pilot.h" | |
13 | SUBROUTINE RXUD (X,QQ,XUD) | |
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 /0.50D00/, Q0/2.1D0/, Q00/1.8D0/ | |
23 | DATA ONED/1.D0/, THRED/3.D0/ | |
24 | IF(QQ.LT.Q0) QQ=Q0 | |
25 | S=LOG(QQ/XLAM**2)/LOG(Q00/XLAM**2) | |
26 | S=LOG(S) | |
27 | ETA1=0.7D00-0.176D00*S | |
28 | ETA2=2.6D00+0.8D00*S | |
29 | XUD=THRED*(X**ETA1)*((ONED-X)**ETA2)/BBETA(ETA1,ONED+ETA2) | |
30 | RETURN | |
31 | END |