Flavor symmetry breaking in the 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}
}
https://doi.org/10.1103/PhysRevD.100.034014
Web of Science
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