Physical Gluons and High $E_T$ Jets

Details Physical Gluons and High $E_T$ Jets Physical Gluons and High $E_T$ Jets

2004-10-15

arxiv.org/abs/hep-ph/0410230v1

Phys.Lett.B604:61-68,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 5 figures. FORTRAN code for parton sets can be found at http://durpdg.dur.ac.uk/hepdata/mrs.html

Scientific paper

10.1016/j.physletb.2004.10.040

We propose a more physical parameterization of the gluon distribution for global parton analyses of deep inelastic and related hard scattering data. In the new parameterization the gluon distribution at large x in the MSbar-scheme is driven by the valence quarks, which naturally produces a shoulder-like form at high x, and hence produces a better description of the Tevatron inclusive jet data. We perform the new analysis at both NLO and NNLO. The improvement is found to be even better at NNLO than at NLO. We make available the new sets of NLO and NNLO partons, which we denote by MRST2004.

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