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

Abstract

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.

Authors:
 [1];  [2];  [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) (SC-26)
OSTI Identifier:
1240600
Alternate Identifier(s):
OSTI ID: 1240482
Report Number(s):
JLAB-THY-15-2183; DOE/OR/23177-3722; arXiv:1512.04459
Journal ID: ISSN 2470-0010; PRVDAQ; TRN: US1600751
Grant/Contract Number:  
AC05-06OR23177; FG02-03ER41260
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 93; Journal Issue: 5; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

McKenney, Joshua R., Sato, 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, Nobuo, Melnitchouk, Wally, & Ji, Chueng-Ryong. Pion structure function from leading neutron electroproduction and SU(2) flavor asymmetry. United States. doi:10.1103/PhysRevD.93.054011.
McKenney, Joshua R., Sato, Nobuo, Melnitchouk, Wally, and Ji, Chueng-Ryong. Mon . "Pion structure function from leading neutron electroproduction and SU(2) flavor asymmetry". United States. doi:10.1103/PhysRevD.93.054011. https://www.osti.gov/servlets/purl/1240600.
@article{osti_1240600,
title = {Pion structure function from leading neutron electroproduction and SU(2) flavor asymmetry},
author = {McKenney, Joshua R. and Sato, Nobuo and Melnitchouk, Wally and Ji, Chueng-Ryong},
abstractNote = {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.},
doi = {10.1103/PhysRevD.93.054011},
journal = {Physical Review D},
number = 5,
volume = 93,
place = {United States},
year = {2016},
month = {3}
}

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Cited by: 6 works
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    Works referencing / citing this record:

    Chiral Corrections to Baryon Electromagnetic Form Factors
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