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Commit | Line | Data |
---|---|---|
fe4da5cc | 1 | * |
2 | * $Id$ | |
3 | * | |
4 | * $Log$ | |
5 | * Revision 1.1.1.2 1996/10/30 08:28:28 cernlib | |
6 | * Version 7.04 | |
7 | * | |
8 | * Revision 1.1.1.1 1996/04/12 15:29:22 plothow | |
9 | * Version 7.01 | |
10 | * | |
11 | * | |
12 | #include "pdf/pilot.h" | |
13 | FUNCTION GHRDV(Y,SQ) | |
14 | C | |
15 | C D-QUARK FROM A PROTON STRUCTURE FUNCTION | |
16 | N=1 | |
17 | A=0.364-0.0368*SQ | |
18 | ASQ=ABS(SQ) | |
19 | SI=1. | |
20 | IF (ASQ.GT.0.) SI=SQ/ABS(SQ) | |
21 | C=2-0.5414*SI*ASQ**0.8 | |
22 | D=5.09+0.3463*SQ | |
23 | GHRDV=N*C*Y**A*(1.-Y**C)**D/BETA(D+1.0,A/C) | |
24 | RETURN | |
25 | END |