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

Conference · Fri Jul 01 04:00:00 EDT 2016 · Few-Body Systems

DOI:https://doi.org/10.1007/s00601-016-1047-7· OSTI ID:1329016

McKenney, J. R. ^[1]; Sato Gonzalez, Nobuo ^[2]; Melnitchouk, Wally ^[2]; Ji, Cheung-Ryong ^[1]

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1. North Carolina State Univ., Raleigh, NC (United States)
2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

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.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
• DOE Contract Number: AC05-06OR23177; FG02-03ER41260
• OSTI ID: 1329016
• Report Number(s): JLAB-THY--15-2269; DOE/OR/23177--3964
• Conference Information: Journal Name: Few-Body Systems Journal Issue: 7 Journal Volume: 57
• Country of Publication: United States
• Language: English

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