Polarized parton distributions at an electron-ion collider

被引：22

作者：

Ball, Richard D. ^{[1
]}

Forte, Stefano ^{[2
,3
]}

Guffanti, Alberto ^{[4
,5
]}

Nocera, Emanuele R. ^{[2
,3
]}

Ridolfi, Giovanni ^{[6
,7
]}

Rojo, Juan ^{[8
]}

机构：

[1] Univ Edinburgh, Tait Inst, JCMB, KB, Edinburgh EH9 3JZ, Midlothian, Scotland

[2] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy

[3] Ist Nazl Fis Nucl, I-20133 Milan, Italy

[4] Niels Bohr Int Acad, DK-2100 Copenhagen, Denmark

[5] Niels Bohr Inst, Discovery Ctr, DK-2100 Copenhagen, Denmark

[6] Univ Genoa, Dipartimento Fis, Genoa, Italy

[7] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy

[8] CERN, TH Unit, PH Dept, CH-1211 Geneva 23, Switzerland

来源：

PHYSICS LETTERS B | 2014年 / 728卷

基金：

欧盟第七框架计划;

关键词：

UNCERTAINTIES;

D O I：

10.1016/j.physletb.2013.12.023

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the potential impact of inclusive deep-inelastic scattering data from a future electron-ion collider (EIC) on longitudinally polarized parton distributions (PDFs). We perform a PDF determination using the NNPDF methodology, based on sets of deep-inelastic EIC pseudodata, for different realistic choices of the electron and proton beam energies. We compare the results to our current polarized PDF set, NNPDFpoll. 0, based on a fit to fixed-target inclusive DIS data. We show that the uncertainties on the first moments of the polarized quark singlet and gluon distributions are substantially reduced in comparison to NNPDFpoll. 0, but also that more measurements may be needed to ultimately pin down the size of the gluon contribution to the nucleon spin. (C) 2013 The Authors. Published by Elsevier B.V. All rights

引用

页码：524 / 531

页数：8

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