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

We refine the computation of the $$\bar{d}$$ - $$\bar{u}$$ 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 $$\bar{d}$$ - $$\bar{u}$$ flavor asymmetry in the proton. A detailed χ2 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.
Authors:
 [1] ;  [2] ;  [2] ;  [1]
  1. North Carolina State Univ., Raleigh, NC (United States)
  2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Publication Date:
OSTI Identifier:
1329016
Report Number(s):
JLAB-THY--15-2269; DOE/OR/23177--3964
DOE Contract Number:
AC05-06OR23177; FG02-03ER41260; CE110001104; FL0992247; DP151103101; 11475186
Resource Type:
Conference
Resource Relation:
Journal Name: Few-Body Systems; Journal Volume: 57; Journal Issue: 7; Conference: Light Cone 2015, September 21-25, 2015, Frascati, Italy
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS