A statistical approach for polarized parton distributions

被引：142

作者：

Bourrely, C

Soffer, J

Buccella, F

机构：

[1] Univ Naples Federico II, Dipartimento Sci Fisiche, I-80126 Naples, Italy

[2] CNRS, F-13288 Marseille 9, France

[3] Ctr Phys Theor, F-13288 Marseille 9, France

来源：

EUROPEAN PHYSICAL JOURNAL C | 2002年 / 23卷 / 03期

关键词：

D O I：

10.1007/s100520100855

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：

A global next-to-loading order QCD analysis of unpolarized and polarized deep-inelastic scattering data is performed with parton distributions constructed in a statistical physical picture of the nucleon. The chiral properties of QCD lead to strong relations between quarks and antiquarks distributions and the importance of the Pauli exclusion principle is also emphasized. We obtain a good description, in a broad range of x and Q(2), of all measured structure functions in terms of very few free parameters. We stress the fact that at RIIIC-BNL the ratio of the unpolarized cross sections for the production of W+ and W- in pp collisions will directly probe the behavior of the (d) over bar (x)(u) over bar (x) ratio for x greater than or equal to 0.2, a definite and important test fur the statistical model. Finally, we give specific predictions for various helicity asymmetries for the W+/-, Z production in pp collisions at high energies, which will be measured with forthcoming experiments at RIIIC-BNL and which are sensitive tests of the statistical model for Delta(u) over bar (x) and Delta(d) over bar (x).

引用

页码：487 / 501

页数：15

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