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MRST2001: partons and alphaS from precise deep inelastic scattering and Tevatron jet data

A. D. Martin, R. G. Roberts, W. J. Stirling, R. S. Thorne

hep-pharXiv:hep-ph/0110215

Abstract

We use all the available new precise data for deep inelastic and related hard scattering processes to perform NLO global parton analyses. These new data allow an improved determination of partons and, in particular, the inclusion of the recent measurements of the structure functions at HERA and of the inclusive jets at the Tevatron help to determine the gluon distribution and alphaS better than ever before. We find a somewhat smaller gluon at low x than previous determinations and that alphaS(MZ2) = 0.119 +/- 0.002 (expt.) +/- 0.003 (theory).

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