| 21886bb6 |
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 |
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