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

Abstract

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:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
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
Journal Name:
Few-Body Systems
Additional Journal Information:
Journal Volume: 57; Journal Issue: 7; Conference: Light Cone 2015, September 21-25, 2015, Frascati, Italy
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

McKenney, J. R., Sato Gonzalez, Nobuo, Melnitchouk, Wally, and Ji, Cheung-Ryong. SU(2) Flavor Asymmetry of the Proton Sea in Chiral Effective Theory. United States: N. p., 2016. Web. doi:10.1007/s00601-016-1047-7.
McKenney, J. R., Sato Gonzalez, Nobuo, Melnitchouk, Wally, & Ji, Cheung-Ryong. SU(2) Flavor Asymmetry of the Proton Sea in Chiral Effective Theory. United States. https://doi.org/10.1007/s00601-016-1047-7
McKenney, J. R., Sato Gonzalez, Nobuo, Melnitchouk, Wally, and Ji, Cheung-Ryong. 2016. "SU(2) Flavor Asymmetry of the Proton Sea in Chiral Effective Theory". United States. https://doi.org/10.1007/s00601-016-1047-7.
@article{osti_1329016,
title = {SU(2) Flavor Asymmetry of the Proton Sea in Chiral Effective Theory},
author = {McKenney, J. R. and Sato Gonzalez, Nobuo and Melnitchouk, Wally and Ji, Cheung-Ryong},
abstractNote = {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.},
doi = {10.1007/s00601-016-1047-7},
url = {https://www.osti.gov/biblio/1329016}, journal = {Few-Body Systems},
number = 7,
volume = 57,
place = {United States},
year = {Fri Jul 01 00:00:00 EDT 2016},
month = {Fri Jul 01 00:00:00 EDT 2016}
}

Conference:
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