C============================================================================
C                CTEQ Parton Distribution Functions: Version 6.0
C                             January 24, 2002
C
C   Ref: "New Generation of Parton Distributions with
C         Uncertainties from Global QCD Analysis"
C   By: J. Pumplin, D.R. Stump, J.Huston, H.L. Lai, P. Nadolsky, W.K. Tung
C       hep-ph/0201195
C
C   This package contains 3 standard sets of CTEQ6 PDF's and 40 up/down sets
C   with respect to CTEQ6M PDF's. Details are:
C ---------------------------------------------------------------------------
C  Iset   PDF        Description       Alpha_s(Mz)**Lam4  Lam5   Table_File
C ---------------------------------------------------------------------------
C   1    CTEQ6M   Standard MSbar scheme   0.118     326   226    cteq6m.tbl
C   2    CTEQ6D   Standard DIS scheme     0.118     326   226    cteq6d.tbl
C   3    CTEQ6L   Leading Order**         0.118     326** 226**  cteq6l.tbl
C     ------------------------------
C   1xx  CTEQ6M1xx  +/- w.r.t. CTEQ6M     0.118     326   226    cteq6m1xx.tbl
C    (where xx=01--40)
C ---------------------------------------------------------------------------
C   ** ALL fits are obtained by using the same coupling strength \alpha_s(Mz)=0.118;
C      and the NLO running \alpha_s formula.  For the LO fit, the evolution of the PDF
C      and the hard cross sections are calculated at LO.  More detailed discussions are
C      given in hep-ph/0201195.
C
C   The table grids are generated for 10^-6 < x < 1 and 1.3 < Q < 10,000 (GeV).
C   PDF values outside of the above range are returned using extrapolation.
C   Lam5 (Lam4) represents Lambda value (in MeV) for 5 (4) flavors.
C   The matching alpha_s between 4 and 5 flavors takes place at Q=4.5 GeV,
C   which is defined as the bottom quark mass, whenever it can be applied.
C
C   The Table_Files are assumed to be in the working directory.
C
C   Before using the PDF, it is necessary to do the initialization by
C       Call SetCtq6(Iset)
C   where Iset is the desired PDF specified in the above table.
C
C   The function Ctq6Pdf (Iparton, X, Q)
C   returns the parton distribution inside the proton for parton [Iparton]
C   at [X] Bjorken_X and scale [Q] (GeV) in PDF set [Iset].
C   Iparton  is the parton label (5, 4, 3, 2, 1, 0, -1, ......, -5)
C                            for (b, c, s, d, u, g, u_bar, ..., b_bar),
C
C   For detailed information on the parameters used, e.q. quark masses,
C   QCD Lambda, ... etc.,  see info lines at the beginning of the
C   Table_Files.
C
C   These programs, as provided, are in double precision.  By removing the
C   "Implicit Double Precision" lines, they can also be run in single
C   precision.
C
C   If you have detailed questions concerning these CTEQ6 distributions,
C   or if you find problems/bugs using this package, direct inquires to
C   Pumplin@pa.msu.edu or Tung@pa.msu.edu.
C
C===========================================================================