SU(2) Flavor Asymmetry of the Proton Sea in Chiral Effective Theory

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• 作者：J. R. McKenney ; Nobuo Sato ; W. Melnitchouk ; Chueng-Ryong Ji
• 刊名：Few-Body Systems
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：57
• 期：7
• 页码：593-599
• 全文大小：491 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Elementary Particles and Nuclei
  Nuclear Physics, Heavy Ions and Hadrons
  Atoms, Molecules, Clusters and Plasmas
  
• 出版者：Springer Wien
• ISSN：1432-5411
• 卷排序：57

文摘

We refine the computation of the d̄ − ū flavor asymmetry in the proton sea with a complementary effort to reveal the dynamics of pion exchange in high-energy processes. In particular, we discuss the efficacy of pion exchange models to simultaneously describe leading neutron electroproduction at HERA along with the d̄ − ū flavor asymmetry in the proton. A detailed \({\chi^{2}}\) analysis of the ZEUS and H1 data, when combined with constraints on the pion flux from Drell-Yan data, allows regions of applicability of one-pion exchange to be delineated. Based on the fit results, we also address a possible estimate for leading proton structure functions in upcoming tagged deep-inelastic scattering experiments at Jefferson Lab on the deuteron with forward protons.Presented by Chueng-Ryong Ji at LIGHTCONE 2015, September 21-25, 2015, Frascati.