Constraints on the asymmetry of the proton in chiral effective theory
Abstract
Here, we compute the $$s-\bar s$$ asymmetry in the proton in chiral effective theory, using available phenomenological constraints from existing data. Unlike previous meson cloud model calculations, which accounted for kaon loop contributions with on-shell intermediate states, our formalism includes off-shell and contact interactions, which impact the shape of the $$s-\bar s$$ difference. Using a finite-range regularization procedure that preserves chiral symmetry and Lorentz invariance, we find that existing data limit the integrated value of the first moment of the asymmetry to the range $$-0.07 \times 10^{-3} \leq \langle x(s-\bar s) \rangle \leq 1.12 \times 10^{-3}$$ at a scale of $Q^2=1$~GeV$^2$. In contrast to some suggestions in the literature, the magnitude of this correction is too small to account for the NuTeV anomaly.
- Authors:
- 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:
- 1325318
- Alternate Identifier(s):
- OSTI ID: 1326567
- Report Number(s):
- JLAB-THY-16-2220; DOE/OR/23177-3679; arXiv:1602.06646; ADP-16-11-T966
Journal ID: ISSN 0370-2693; S0370269316305081; PII: S0370269316305081
- Grant/Contract Number:
- AC05-06OR23177; FG02-03ER41260; CE110001104; FL0992247; DP151103101; 11475186
- Resource Type:
- Published Article
- Journal Name:
- Physics Letters B
- Additional Journal Information:
- Journal Name: Physics Letters B Journal Volume: 762 Journal Issue: C; Journal ID: ISSN 0370-2693
- Publisher:
- Elsevier
- Country of Publication:
- Netherlands
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; strange asymmetry; chiral symmetry; Kaon loops
Citation Formats
Wang, X. G., Ji, Chueng-Ryong, Melnitchouk, W., Salamu, Y., Thomas, A. W., and Wang, P. Constraints on the s − s ¯ asymmetry of the proton in chiral effective theory. Netherlands: N. p., 2016.
Web. doi:10.1016/j.physletb.2016.09.014.
Wang, X. G., Ji, Chueng-Ryong, Melnitchouk, W., Salamu, Y., Thomas, A. W., & Wang, P. Constraints on the s − s ¯ asymmetry of the proton in chiral effective theory. Netherlands. https://doi.org/10.1016/j.physletb.2016.09.014
Wang, X. G., Ji, Chueng-Ryong, Melnitchouk, W., Salamu, Y., Thomas, A. W., and Wang, P. Tue .
"Constraints on the s − s ¯ asymmetry of the proton in chiral effective theory". Netherlands. https://doi.org/10.1016/j.physletb.2016.09.014.
@article{osti_1325318,
title = {Constraints on the s − s ¯ asymmetry of the proton in chiral effective theory},
author = {Wang, X. G. and Ji, Chueng-Ryong and Melnitchouk, W. and Salamu, Y. and Thomas, A. W. and Wang, P.},
abstractNote = {Here, we compute the $s-\bar s$ asymmetry in the proton in chiral effective theory, using available phenomenological constraints from existing data. Unlike previous meson cloud model calculations, which accounted for kaon loop contributions with on-shell intermediate states, our formalism includes off-shell and contact interactions, which impact the shape of the $s-\bar s$ difference. Using a finite-range regularization procedure that preserves chiral symmetry and Lorentz invariance, we find that existing data limit the integrated value of the first moment of the asymmetry to the range $-0.07 \times 10^{-3} \leq \langle x(s-\bar s) \rangle \leq 1.12 \times 10^{-3}$ at a scale of $Q^2=1$~GeV$^2$. In contrast to some suggestions in the literature, the magnitude of this correction is too small to account for the NuTeV anomaly.},
doi = {10.1016/j.physletb.2016.09.014},
journal = {Physics Letters B},
number = C,
volume = 762,
place = {Netherlands},
year = {Tue Nov 01 00:00:00 EDT 2016},
month = {Tue Nov 01 00:00:00 EDT 2016}
}
https://doi.org/10.1016/j.physletb.2016.09.014
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Works referencing / citing this record:
The sea of quarks and antiquarks in the nucleon
journal, March 2019
- Geesaman, D. F.; Reimer, P. E.
- Reports on Progress in Physics, Vol. 82, Issue 4