Scheme dependence, leading order and higher twist studies of MRST partons
High Energy Physics - Phenomenology
2009-10-31 v1
Abstract
We extend a recent global analysis of nucleon parton distributions carried out at next-to-leading order (NLO) in the MSbar scheme to provide distributions in the so-called DIS scheme. We pay particular attention to the translation of the heavy quark distributions in going from the MSbar to the DIS scheme. We repeat the global analysis at leading order (LO) and comment on the major effects produced when going from LO to NLO. Finally we include in the global analysis a freely parameterised form of possible higher twist contributions to make an exploratory study of the size of these effects as a function of x.
Keywords
Cite
@article{arxiv.hep-ph/9808371,
title = {Scheme dependence, leading order and higher twist studies of MRST partons},
author = {A. D. Martin and R. G. Roberts and W. J. Stirling and R. S. Thorne},
journal= {arXiv preprint arXiv:hep-ph/9808371},
year = {2009}
}
Comments
12 (Latex) pages, including 3 embedded figures, uses epsfig.sty