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Title: Flavor symmetry breaking in the Δ sea

Abstract

The finding of a sizeable asymmetry in the $$\bar u$$ and $$\bar d$$ distributions in the proton was one of the more consequential experimental findings in hadron physics last century. Although widely believed to be related to the fundamental role of chiral symmetry in QCD, a definitive verification of this hypothesis has remained elusive. We introduce a novel test of the role of chiral symmetry in generating the sea flavor asymmetry by comparing the $$\bar d-\bar u$$ content in the proton with that in the $$\Delta^+$$ baryon, where a significant enhancement is expected around the opening of the $$N \pi$$ decay channel. Recent developments in lattice QCD suggest a promising way to test this prediction in the near future.

Authors:
; ; ;
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE; Netherlands Organization for Scientific Research (NWO); German Research Foundation (DFG)
OSTI Identifier:
1556840
Alternate Identifier(s):
OSTI ID: 1557625
Report Number(s):
JLAB-THY-18-2806; DOE/OR/-23177-4542; arXiv:1809.06885
Journal ID: ISSN 2470-0010; PRVDAQ; 034014
Grant/Contract Number:  
AC05-06OR23177; CE110001104; DP150103164; 392578569
Resource Type:
Published Article
Journal Name:
Physical Review. D.
Additional Journal Information:
Journal Name: Physical Review. D. Journal Volume: 100 Journal Issue: 3; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Ethier, J. J., Melnitchouk, W., Steffens, Fernanda, and Thomas, A. W. Flavor symmetry breaking in the Δ sea. United States: N. p., 2019. Web. doi:10.1103/PhysRevD.100.034014.
Ethier, J. J., Melnitchouk, W., Steffens, Fernanda, & Thomas, A. W. Flavor symmetry breaking in the Δ sea. United States. https://doi.org/10.1103/PhysRevD.100.034014
Ethier, J. J., Melnitchouk, W., Steffens, Fernanda, and Thomas, A. W. Thu . "Flavor symmetry breaking in the Δ sea". United States. https://doi.org/10.1103/PhysRevD.100.034014.
@article{osti_1556840,
title = {Flavor symmetry breaking in the Δ sea},
author = {Ethier, J. J. and Melnitchouk, W. and Steffens, Fernanda and Thomas, A. W.},
abstractNote = {The finding of a sizeable asymmetry in the $\bar u$ and $\bar d$ distributions in the proton was one of the more consequential experimental findings in hadron physics last century. Although widely believed to be related to the fundamental role of chiral symmetry in QCD, a definitive verification of this hypothesis has remained elusive. We introduce a novel test of the role of chiral symmetry in generating the sea flavor asymmetry by comparing the $\bar d-\bar u$ content in the proton with that in the $\Delta^+$ baryon, where a significant enhancement is expected around the opening of the $N \pi$ decay channel. Recent developments in lattice QCD suggest a promising way to test this prediction in the near future.},
doi = {10.1103/PhysRevD.100.034014},
journal = {Physical Review. D.},
number = 3,
volume = 100,
place = {United States},
year = {Thu Aug 01 00:00:00 EDT 2019},
month = {Thu Aug 01 00:00:00 EDT 2019}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevD.100.034014

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Cited by: 3 works
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Works referenced in this record:

Gottfried sum rule and the shape ofF 2 ? -F 2 ?
journal, March 1991

  • Melnitchouk, W.; Thomas, A. W.; Signal, A. I.
  • Zeitschrift f�r Physik A: Hadrons and Nuclei, Vol. 340, Issue 1
  • DOI: 10.1007/BF01284484

Chiral aspects of hadron structure
journal, May 2000


Dynamical Symmetry Breaking in the Sea of the Nucleon
journal, October 2000


Origin of SU(2)-flavor-symmetry breaking in antiquark distributions
journal, August 1991


Chiral extrapolation of hadronic observables
journal, May 2003


Extraction of Parton Distributions from Lattice qcd
journal, December 2003


Factorization theorem relating Euclidean and light-cone parton distributions
journal, September 2018


Gottfried sum from the ratio F 2 n / F 2 p
journal, May 1991


Nonperturbative Renormalization of Nonlocal Quark Bilinears for Parton Quasidistribution Functions on the Lattice Using an Auxiliary Field
journal, July 2018


Strange-quark asymmetry in the proton in chiral effective theory
journal, November 2016


Study of the isospin symmetry breaking in the light quark sea of the nucleon from the Drell-Yan process
journal, July 1994


Leading Chiral Contributions to the Spin Structure of the Proton
journal, January 2002


Convergence of chiral effective field theory
journal, January 2003


Erratum: Pionic corrections to the MIT bag model: The (3,3) resonance
journal, May 1981


d ¯ u ¯ Asymmetry in the Proton in Chiral Effective Theory
journal, March 2015


Parton distribution functions in the pion from lattice QCD
journal, August 2003


Pion structure function at small x from deep-inelastic scattering data
journal, June 2012


Parton distributions for the pion extracted from Drell-Yan and prompt photon experiments
journal, April 1992


Chiral corrections to matrix elements of twist-2 operators
journal, January 2002


Parton distributions from nonlocal chiral SU(3) effective theory: Splitting functions
journal, January 2019


Pion structure function from leading neutron electroproduction and SU(2) flavor asymmetry
journal, March 2016


Parton Physics on a Euclidean Lattice
journal, June 2013


One-loop matching for parton distributions: Nonsinglet case
journal, July 2014


π and ρ structure functions from lattice QCD
journal, September 1997


Excess of over in the proton sea quark distribution
journal, November 1990


Light-Cone Parton Distribution Functions from Lattice QCD
journal, September 2018


Large-Nc quark distributions in the delta and chiral logarithms in quark distributions of the nucleon
journal, December 2001


Soft-Gluon Resummation and the Valence Parton Distribution Function of the Pion
journal, December 2010


Theory of Deep-Inelastic Lepton-Nucleon Scattering and Lepton Pair Annihilation Processes. II. Deep-Inelastic Electron Scattering
journal, February 1970


Baryon masses from lattice QCD: Beyond the perturbative chiral regime
journal, February 2000


Lattice calculation of parton distributions
journal, July 2015


Power counting regime of chiral effective field theory and beyond
journal, August 2010


Chiral Extrapolation of Lattice Moments of Proton Quark Distributions
journal, October 2001


A limit on the pionic component of the nucleon through SU(3) flavour breaking in the sea
journal, June 1983


Pion momentum distributions in the nucleon in chiral effective theory
journal, March 2013


Pionic corrections to the MIT bag model: The (3,3) resonance
journal, December 1980


First Monte Carlo Global QCD Analysis of Pion Parton Distributions
journal, October 2018


x and x 2 of the pion PDF from lattice QCD with N f = 2 + 1 + 1 dynamical quark flavors
journal, January 2019


Delta baryon magnetic moments from lattice QCD
journal, June 2003


Parton distribution function with nonperturbative renormalization from lattice QCD
journal, January 2018


Dynamics of light antiquarks in the proton
journal, December 1998


A complete non-perturbative renormalization prescription for quasi-PDFs
journal, October 2017


Sum Rule for High-Energy Electron-Proton Scattering
journal, June 1967


Measurement of the Light Antiquark Flavor Asymmetry in the Nucleon Sea
journal, April 1998


Anatomy of relativistic pion loop corrections to the electromagnetic nucleon coupling
journal, October 2013


Flavor structure of the nucleon sea from lattice QCD
journal, March 2015


Nucleon helicity and transversity parton distributions from lattice QCD
journal, October 2016


Updated lattice results for parton distributions
journal, July 2017

  • Alexandrou, Constantia; Cichy, Krzysztof; Constantinou, Martha
  • Physical Review D, Vol. 96, Issue 1
  • DOI: 10.1103/PhysRevD.96.014513