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Type: Journal article
Title: Flavor symmetry breaking in the Delta sea
Author: Ethier, J.J.
Melnitchouk, W.
Steffens, F.
Thomas, A.W.
Citation: Physical Review D, 2019; 100(3):034014-1-034014-6
Publisher: American Physical Society
Issue Date: 2019
ISSN: 2470-0010
Statement of
J. J. Ethier, W. Melnitchouk, Fernanda Steffens and A. W. Thomas
Abstract: The discovery of a sizeable asymmetry in the ¯u and ¯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 propose a novel test of the role of chiral symmetry in generating the sea flavor asymmetry by comparing the ¯d−¯u content in the proton with that in the Δ+ baryon, where a significant enhancement is expected around the opening of the Nπ decay channel. Recent developments in lattice QCD suggest a promising way to test this prediction in the near future.
Rights: Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
DOI: 10.1103/PhysRevD.100.034014
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