CTEQ Parton distributions
The CTEQ parton distributions are produced by the various subsets
of the CTEQ group. The authors for the CTEQ3 distribution, for instance, are
H.L. Lai, J. Botts, J. Huston, J.G. Morfin, J.F. Owens, J. Qiu,
W.K. Tung and H. Weerts.
Name convention for CTEQ distributions
CTEQnS where
n : version number
S : Normally a factorization scheme label: = [M L D] for
[MSbar, Lowest Order, DIS] respectively.
Sometimes S denotes some special characteristic of the set.
Thus for example, CTEQ4M gives the fourth set of CTEQ parton distributions in the MSbar scheme, while CTEQ4HJ is a special fit that emphasizes high ET jet data.
References
 CTEQ1
 J. Botts, J.G. Morfin, J.F. Owens, J. Qiu,
W.K. Tung and H. Weerts, Phys. Lett. B304, 159 (1993)
eprint Archive
hepph/9303255.
 CTEQ3
 H.L. Lai, J. Botts, J. Huston, J.G. Morfin, J.F. Owens, J. Qiu,
W.K. Tung and H. Weerts, Phys. Rev. D51, 4763 (1995), eprint Archive
hepph/9410404.
 CTEQ4
 H.L. Lai, J. Huston, S. Kuhlmann, J.F. Owens, D.E. Soper,
W.K. Tung and H. Weerts, Phys. Rev. D55, 1280 (1997),
eprint Archive
hepph/9606399.
 CTEQ5

H.L. Lai et al. [CTEQ Collaboration],
Eur. Phys. J. C 12 , 375 (2000),
eprint Archive
hepph/9903282.
 CTEQ6

J. Pumplin, D.R. Stump, J. Huston, H.L. Lai, P. Nadolsky and W.K. Tung,
JHEP 0207, 012 (2002),
eprint Archive
hepph/0201195.
Smoothing
For the CTEQ4 partons, we have made a parton
table using the table interpolation supplied by CTEQ. However, our
table interpolation requires that the parton distributions represented
in the tables be smooth functions of x and Q^{2}.
At some places (where the values of the parton distributions are small)
the functions given by the CTEQ parton tables are not smooth. We have,
therefore, applied a smoothing operation to the
table in our format. Here is a picture illustrating our smoothed version and
the original CTEQ version. For previous CTEQ parton distributions, we
did not find a need for smoothing.
FORTRAN code for creating these tables
 Code to
create our CTEQ2 table.
 Code to
create our CTEQ3 table.
 Code to create our
CTEQ4 tables.
 Code to create our
CTEQ5 tables.
 Code to create our
CTEQ6 tables.
Parton distribution tables
 CTEQ2M parton distribution table.
 CTEQ3M parton distribution table.
 CTEQ4M parton distribution table.
 CTEQ4D parton distribution table.
 CTEQ4L parton distribution table.
 CTEQ4A1 parton distribution table.
 CTEQ4A2 parton distribution table.
 CTEQ4A4 parton distribution table.
 CTEQ4A5 parton distribution table.
 CTEQ4HJ parton distribution table.
 CTEQ4LQ parton distribution table.
 CTEQ5M parton distribution table.
 CTEQ5D parton distribution table.
 CTEQ5L parton distribution table.
 CTEQ5HJ parton distribution table.
 CTEQ5HQ parton distribution table.
 CTEQ6M parton distribution table.
Davison E. Soper and Parvez Anandam
Institute of Theoretical Science,
University of Oregon, Eugene OR 97403 USA
soper@bovine.uoregon.edu
anandam@darkwing.uoregon.edu