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

Abstract

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$^2$. Based on the fit results, we provide estimates for leading proton structure functions in upcoming tagged deep-inelastic scattering experiments at Jefferson Lab on the deuteron with forward protons.

Authors:
 [1]; ;  [2];  [3]
  1. 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)
  2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  3. North Carolina State Univ., Raleigh, NC (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:
1245177
Report Number(s):
JLAB-THY-15-2183; DOE/OR/23177-3722; arXiv:1512.04459
Journal ID: ISSN 2470-0010; PRVDAQ
DOE Contract Number:  
AC05-06OR23177; FG02-03ER41260
Resource Type:
Journal Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 93; Journal Issue: 5; Journal ID: ISSN 2470-0010
Country of Publication:
United States
Language:
English

Citation Formats

McKenney, Joshua R., Sato Gonzalez, Nobuo, Melnitchouk, Wally, and Ji, Chueng-Ryong. Pion structure function from leading neutron electroproduction and SU(2) flavor asymmetry. United States: N. p., 2016. Web. doi:10.1103/PhysRevD.93.054011.
McKenney, Joshua R., Sato Gonzalez, Nobuo, Melnitchouk, Wally, & Ji, Chueng-Ryong. Pion structure function from leading neutron electroproduction and SU(2) flavor asymmetry. United States. https://doi.org/10.1103/PhysRevD.93.054011
McKenney, Joshua R., Sato Gonzalez, Nobuo, Melnitchouk, Wally, and Ji, Chueng-Ryong. 2016. "Pion structure function from leading neutron electroproduction and SU(2) flavor asymmetry". United States. https://doi.org/10.1103/PhysRevD.93.054011. https://www.osti.gov/servlets/purl/1245177.
@article{osti_1245177,
title = {Pion structure function from leading neutron electroproduction and SU(2) flavor asymmetry},
author = {McKenney, Joshua R. and Sato Gonzalez, Nobuo and Melnitchouk, Wally and Ji, Chueng-Ryong},
abstractNote = {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$^2$. Based on the fit results, we provide estimates for leading proton structure functions in upcoming tagged deep-inelastic scattering experiments at Jefferson Lab on the deuteron with forward protons.},
doi = {10.1103/PhysRevD.93.054011},
url = {https://www.osti.gov/biblio/1245177}, journal = {Physical Review D},
issn = {2470-0010},
number = 5,
volume = 93,
place = {United States},
year = {Tue Mar 01 00:00:00 EST 2016},
month = {Tue Mar 01 00:00:00 EST 2016}
}

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Works referencing / citing this record:

Chiral Corrections to Baryon Electromagnetic Form Factors
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Drawing insights from pion parton distributions
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Parton distributions from nonlocal chiral SU(3) effective theory: Flavor asymmetries
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Symmetry, symmetry breaking, and pion parton distributions
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Valence-quark distribution functions in the kaon and pion
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First Monte Carlo Global QCD Analysis of Pion Parton Distributions
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Chiral Corrections to Baryon Electromagnetic Form Factors
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Symmetry, symmetry breaking, and pion parton distributions
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Pion and Kaon Structure at the Electron-Ion Collider
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