Dynamical parton distributions of the nucleon and very small-x physics

被引：167

作者：

Glueck, M. ^{[1
]}

Jimenez-Delgado, P. ^{[1
]}

Reya, E. ^{[1
]}

机构：

[1] Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany

来源：

EUROPEAN PHYSICAL JOURNAL C | 2008年 / 53卷 / 03期

关键词：

D O I：

10.1140/epjc/s10052-007-0462-9

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Utilizing recent DIS measurements (F-2,F-L) and data on dilepton and high-E-T jet production we determine the dynamical parton distributions of the nucleon generated radiatively from valence-like positive input distributions at optimally chosen low resolution scales. These are compared with 'standard' distributions generated from positive input distributions at some fixed and higher resolution scale. It is shown that up to the next-to-leading order NLO(<(MS)over bar >, DIS) of perturbative QCD considered in this paper, the uncertainties of the dynamical distributions are, as expected, smaller than those of their standard counterparts. This holds true in particular in the presently unexplored extremely small-x region relevant for evaluating ultrahigh energy cross sections in astrophysical applications. It is noted that our new dynamical distributions are compatible, within the presently determined uncertainties, with previously determined dynamical parton distributions.

引用

页码：355 / 366

页数：12

共 87 条

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