MRST partons and uncertainties

Abstract

We discuss uncertainties in the extraction of parton distributions from global analyses of DIS and related data. We present conservative sets of partons, at both NLO and NNLO, which are stable to x,Q^2,W^2 cuts on the data. We give the corresponding values of alpha(M_Z^2) and the cross sections for W production at the Tevatron.

Comments: 6 pages, 2 figures, 2 tables. Contribution to XI International Workshop on Deep Inelastic Scattering, St. Petersburg, 23-27 April 2003