The VIRCOL website

The Alekhin set:

Publication: hep-ph/0011002
Status: Preliminary.
Method of error propagation : Random sampling.
Method of PDF fitting: Gaussian approximation, covariance matrix method.
Evolution code: QCDNUM (note that during fit another evolution code was used).
Content:

	Alekhin_100.LHpdf (100 random sampling PDFs),
	Alekhin_1000.LHpdf (1000 random sampling PDFs).

The Botje set:

Publication: hep-ph/9912439.
Status: Preliminary.
Method of error propagation : Random sampling.
Method of PDF fitting: Gaussian approximation, offset method.
Evolution code: QCDNUM.
Content:

	Botje_100.LHpdf (100 random sampling PDFs),
	Botje_1000.LHpdf (1000 random sampling PDFs).

The CTEQ6 set: cteq6.tar

Publication: hep-ph/0201195.
Status: Preliminary.
Method of error propagation : (see publication).
Method of PDF fitting: Gaussian approximation, covariance matrix method.
Evolution code: EVLCTEQ.
Content:

	cteq6.LHpdf (40  PDFs),
	cteq6l.LHpdf (1 PDF, Leading Order fit with Next-to-Leading Order alpha_S)
	cteq6ll.LHpdf (1 PDF, Leading Order fit with Leading Order alpha_S)

The Fermi2001 set:

Publication: hep-ph/0104052.
Status: Author approved.
Method of error propagation : Random sampling.
Method of PDF fitting: Metropolis algorithm method.
Evolution code: QCDNUM.
Content:

	Fermi2002_100.LHpdf (100 random sampling PDFs),
	Fermi2002_1000.LHpdf (1000 random sampling PDFs).

The MRST2001 set:

Publication: hep-ph/0110215.
Status: Preliminary.
Method of error propagation : No PDF uncertainties in this set.
Method of PDF fitting: Gaussian approximation, minimum chi^2.
Evolution code: QCDNUM (note that during fit another evolution code was used).
Content:

MRST2001.LHpdf MRST2001 fit (mem=0 and mem=1), MRST2001J fit (mem=2).

Note: The MRST2001 publication contains 4 PDF fits. However the parametric information of only 2 of them are contained in the publication.

The MRST98 set:

Publication: hep-ph/9803445.
Status: Preliminary.
Method of error propagation : No PDF uncertainties in this set.
Method of PDF fitting: Gaussian approximation, minimum chi^2.
Evolution code: QCDNUM (note that during fit another evolution code was used).
Content:

MRST98.LHpdf

	Lower gluon fit, assumed <Kt> smearing for WA70: 0.64 GeV (mem=1),
	Central gluon fit, assumed <Kt> smearing for WA70 0.40 GeV (mem=0 and mem=2),
	Higher gluon fit, assumed <Kt> smearing for WA70 0.00 GeV (mem=3).

Note: the MRST98 publication contains 5 PDF fits. However the parametric information of only 3 of them are contained in the publication.