Global study of nuclear modifications on parton distribution functions

A global analysis of nuclear medium modifications of parton distributions is presented using deeply inelastic scattering data of various nuclear targets. Two obtained data sets are provided for quark and gluon nuclear modification factors, referred as nIMParton16. One is from the global fit only to...

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Main Authors: Rong Wang, Xurong Chen, Qiang Fu
Format: Article
Language:English
Published: Elsevier 2017-07-01
Series:Nuclear Physics B
Online Access:http://www.sciencedirect.com/science/article/pii/S0550321317301293
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spelling doaj-91e9065dee0e4612b1e87658fa099bc72020-11-24T22:47:40ZengElsevierNuclear Physics B0550-32131873-15622017-07-01920C11910.1016/j.nuclphysb.2017.04.008Global study of nuclear modifications on parton distribution functionsRong Wang0Xurong Chen1Qiang Fu2Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaInstitute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, ChinaA global analysis of nuclear medium modifications of parton distributions is presented using deeply inelastic scattering data of various nuclear targets. Two obtained data sets are provided for quark and gluon nuclear modification factors, referred as nIMParton16. One is from the global fit only to the experimental data of isospin-scalar nuclei (Set A), and the other is from the fit to all the measured nuclear data (Set B). The scale-dependence is described by DGLAP equations with nonlinear corrections in this work. The Fermi motion and off-shell effect, nucleon swelling, and parton–parton recombination are taken into account together for modeling the complicated x-dependence of nuclear modification. The nuclear gluon shadowing in this paper is dynamically generated by the QCD evolution of parton splitting and recombination processes with zero gluon density at the input scale. Sophisticated nuclear dependence of nuclear medium effects is studied with only two free parameters. With the obtained free parameters from the global analysis, the nuclear modifications of parton distribution functions of unmeasured nuclei can be predicted in our model. Nuclear modification of deuteron is also predicted and shown with recent measurement at JLab.http://www.sciencedirect.com/science/article/pii/S0550321317301293
collection DOAJ
language English
format Article
sources DOAJ
author Rong Wang
Xurong Chen
Qiang Fu
spellingShingle Rong Wang
Xurong Chen
Qiang Fu
Global study of nuclear modifications on parton distribution functions
Nuclear Physics B
author_facet Rong Wang
Xurong Chen
Qiang Fu
author_sort Rong Wang
title Global study of nuclear modifications on parton distribution functions
title_short Global study of nuclear modifications on parton distribution functions
title_full Global study of nuclear modifications on parton distribution functions
title_fullStr Global study of nuclear modifications on parton distribution functions
title_full_unstemmed Global study of nuclear modifications on parton distribution functions
title_sort global study of nuclear modifications on parton distribution functions
publisher Elsevier
series Nuclear Physics B
issn 0550-3213
1873-1562
publishDate 2017-07-01
description A global analysis of nuclear medium modifications of parton distributions is presented using deeply inelastic scattering data of various nuclear targets. Two obtained data sets are provided for quark and gluon nuclear modification factors, referred as nIMParton16. One is from the global fit only to the experimental data of isospin-scalar nuclei (Set A), and the other is from the fit to all the measured nuclear data (Set B). The scale-dependence is described by DGLAP equations with nonlinear corrections in this work. The Fermi motion and off-shell effect, nucleon swelling, and parton–parton recombination are taken into account together for modeling the complicated x-dependence of nuclear modification. The nuclear gluon shadowing in this paper is dynamically generated by the QCD evolution of parton splitting and recombination processes with zero gluon density at the input scale. Sophisticated nuclear dependence of nuclear medium effects is studied with only two free parameters. With the obtained free parameters from the global analysis, the nuclear modifications of parton distribution functions of unmeasured nuclei can be predicted in our model. Nuclear modification of deuteron is also predicted and shown with recent measurement at JLab.
url http://www.sciencedirect.com/science/article/pii/S0550321317301293
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AT xurongchen globalstudyofnuclearmodificationsonpartondistributionfunctions
AT qiangfu globalstudyofnuclearmodificationsonpartondistributionfunctions
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