Uncertainties in determining parton distributions at large x

被引：71

作者：

Accardi, A. ^{[1
,2
]}

Melnitchouk, W. ^{[2
]}

Owens, J. F. ^{[3
]}

Christy, M. E. ^{[1
]}

Keppel, C. E. ^{[1
]}

Zhu, L. ^{[1
]}

Morfin, J. G. ^{[4
]}

机构：

[1] Hampton Univ, Hampton, VA 23668 USA

[2] Jefferson Lab, Newport News, VA 23606 USA

[3] Florida State Univ, Tallahassee, FL 32306 USA

[4] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

来源：

PHYSICAL REVIEW D | 2011年 / 84卷 / 01期

基金：

美国国家科学基金会;

关键词：

INELASTIC MUON SCATTERING; DEUTERON STRUCTURE FUNCTIONS; NUCLEON STRUCTURE FUNCTIONS; NEUTRON STRUCTURE-FUNCTION; CROSS-SECTIONS; E-P; PROTON; HYDROGEN; RATIO; D/U;

D O I：

10.1103/PhysRevD.84.014008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We critically examine uncertainties in parton distribution functions (PDFs) at large x arising from nuclear effects in deuterium F-2 structure function data. Within a global PDF analysis, we assess the impact on the PDFs from uncertainties in the deuteron wave function at short distances and nucleon off-shell effects, from the use of relativistic kinematics, and from the use of a less restrictive parametrization of the d/u ratio. We find, in particular, that the d-quark and gluon PDFs vary significantly with the choice of nuclear model. We highlight the impact of these uncertainties on the determination of the neutron structure functions, and on W boson production and parton luminosity at the Tevatron and the LHC. Finally, we discuss prospects for new measurements sensitive to the d-quark and gluon distributions but insensitive to nuclear corrections.

引用

页数：16

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