A first unbiased global determination of polarized PDFs and their uncertainties

被引：279
作者：
Nocera, Emanuele R. [2 ,3 ]
Ball, Richard D. [1 ]
Forte, Stefano [2 ,3 ]
Ridolfi, Giovanni [4 ,5 ]
Rojo, Juan [6 ,7 ]
机构：
[1] Univ Edinburgh, Higgs Ctr, JCMB, KB, Edinburgh EH9 3JZ, Midlothian, Scotland
[2] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy
[3] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy
[4] Univ Genoa, Dipartimento Fis, Genoa, Italy
[5] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy
[6] CERN, PH Dept, TH Unit, CH-1211 Geneva 23, Switzerland
[7] Univ Oxford, Rudolf Peierls Ctr Theoret Phys, Oxford OX1 3NP, England
来源：
NUCLEAR PHYSICS B | 2014年 / 887卷
关键词：
DEEP-INELASTIC-SCATTERING; TO-LEADING ORDER; DEPENDENT STRUCTURE-FUNCTION; JET CROSS-SECTIONS; PARTON DISTRIBUTIONS; SPIN STRUCTURE; QUARK DISTRIBUTIONS; PROTON; FRAGMENTATION; ASYMMETRY;
D O I：
10.1016/j.nuclphysb.2014.08.008
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：
We present a first global determination of spin-dependent parton distribution functions (PDFs) and their uncertainties using the NNPDF methodology: NNPDFpol1.1. Longitudinally polarized deep-inelastic scattering data, already used for the previous NNPDFpol1.0 PDF set, are supplemented with the most recent polarized hadron collider data for inclusive jet and W boson production from the STAR and PHENIX experiments at RHIC, and with open-charm production data from the COMPASS experiment, thereby allowing for a separate determination of the polarized quark and antiquark PDFs, and an improved determination of the medium- and large-x polarized gluon PDF. We study the phenomenological implications of the NNPDFpol1. 1 set, and we provide predictions for the longitudinal double-spin asymmetry for semi-inclusive pion production at RHIC. (C) 2014 CERN for the benefit of the NNPDF Collaboration. Published by Elsevier B.V.
引用
收藏
页码：276 / 308
页数：33
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