Pion structure function from leading neutron electroproduction and SU(2) flavor asymmetry

McKenney, Joshua R.; Sato, Nobuo; Melnitchouk, Wally; Ji, Chueng-Ryong

doi:10.1103/PhysRevD.93.054011

Pion structure function from leading neutron electroproduction and SU(2) flavor asymmetry

Journal Article · Mon Mar 07 00:00:00 EST 2016 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.93.054011· OSTI ID:1240600

McKenney, Joshua R. ^[1]; Sato, Nobuo ^[2]; Melnitchouk, Wally ^[2]; Ji, Chueng-Ryong ^[3]

North Carolina State Univ., Raleigh, NC (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Univ. of North Carolina, Chapel Hill, NC (United States)
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
North Carolina State Univ., Raleigh, NC (United States)

In this paper, we examine the efficacy of pion exchange models to simultaneously describe leading neutron electroproduction at HERA and the $$\bar{d}-\bar{u}$$ flavor asymmetry in the proton. A detailed $$\chi^2$$ analysis of the ZEUS and H1 cross sections, when combined with constraints on the pion flux from Drell-Yan data, allows regions of applicability of one-pion exchange to be delineated. The analysis disfavors several models of the pion flux used in the literature, and yields an improved extraction of the pion structure function and its uncertainties at parton momentum fractions in the pion of $$4 \times 10^{-4} \lesssim x_\pi \lesssim 0.05$$ at a scale of $Q^2$=10 GeV$^2$. Also, we provide estimates for leading proton structure functions in upcoming tagged deep-inelastic scattering experiments on the deuteron with forward protons, based on the fit results, at Jefferson Lab.

View Accepted Manuscript (DOE)

Research Organization:: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)

Grant/Contract Number:: AC05-06OR23177; FG02-03ER41260

OSTI ID:: 1240600

Alternate ID(s):: OSTI ID: 1240482
OSTI ID: 1245177

Report Number(s):: DOE/OR/23177--3722; JLAB-THY--15-2183; arXiv:1512.04459

Journal Information:: Physical Review D, Journal Name: Physical Review D Journal Issue: 5 Vol. 93; ISSN PRVDAQ; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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