Fits to data on polarised structure functions and spin asymmetries with power law corrections

2003/07/30 by J. Bartelski, Jan Bartelski, Bartelski, J. +2
Chemistry · Physics and Astronomy · #Advanced NMR Techniques and Applications #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/0307374

9 pages, LATEX, small corrections in Tables, values of parameters with errors added

openalex publication_date 2003/07/30 · arxiv created 2003/09/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We have compared polarized parton densities determined in the NLO QCD fits to polarized structure functions and spin asymmetries. We consider models of such distributions based on MRST 99 and MRST 2001 fits to non-polarized data. Simple power law corrections corresponding to higher twists are taken into account and their importance is analyzed. The role of positivity conditions for parton densities and their influence on the values of χ² is discussed.

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