Eur. Phys. J. C 23, 73-87 (2002)
https://doi.org/10.1007/s100520100842

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

¹ Department of Physics and Institute for Particle Physics Phenomenology, University of Durham, Durham, DH1 3LE, UK
² Theory Division, CERN, 1211 Geneva 23, Switzerland
³ Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge, CB3 0HE, UK

Received: 17 October 2001
Revised: 29 October 2001
Published online: 20 December 2001

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 α_S better than ever before. We find a somewhat smaller gluon at low x than previous determinations and that α_S (M_Z²) = 0.119 ± 0.002 (expt.) ± 0.003 (theory).