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https://hdl.handle.net/2440/104258
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dc.contributor.author | Wang, X. | - |
dc.contributor.author | Ji, C. | - |
dc.contributor.author | Melnitchouk, W. | - |
dc.contributor.author | Salamu, Y. | - |
dc.contributor.author | Thomas, A. | - |
dc.contributor.author | Wang, P. | - |
dc.date.issued | 2016 | - |
dc.identifier.citation | Physical Review D, 2016; 94(9):094035-1-094035-22 | - |
dc.identifier.issn | 2470-0010 | - |
dc.identifier.issn | 2470-0029 | - |
dc.identifier.uri | http://hdl.handle.net/2440/104258 | - |
dc.description.abstract | We perform a comprehensive analysis of the strange-antistrange parton distribution function (PDF) asymmetry in the proton in the framework of chiral effective theory, including the full set of lowest-order kaon loop diagrams with off-shell and contact interactions, in addition to the usual on-shell contributions previously discussed in the literature. We identify the presence of δ-function contributions to the s‾ PDF at x = 0, with a corresponding valencelike component of the s-quark PDF at larger x, which allows greater flexibility for the shape of s- s‾. Expanding the moments of the PDFs in terms of the pseudoscalar kaon mass, we compute the leading nonanalytic behavior of the number and momentum integrals of the s and s‾ distributions, consistent with the chiral symmetry of QCD. We discuss the implications of our results for the understanding of the NuTeV anomaly and for the phenomenology of strange-quark PDFs in global QCD analysis. | - |
dc.description.statementofresponsibility | X.G. Wang, Chueng-Ryong Ji, W. Melnitchouk, Y. Salamu, A.W. Thomas, and P. Wang | - |
dc.language.iso | en | - |
dc.publisher | American Physical Society | - |
dc.rights | © 2016 American Physical Society | - |
dc.source.uri | http://dx.doi.org/10.1103/physrevd.94.094035 | - |
dc.title | Strange-quark asymmetry in the proton in chiral effective theory | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1103/PhysRevD.94.094035 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/CE1101004 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/FL0992247 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/DP150103101 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Wang, X. [0000-0001-9164-0027] | - |
dc.identifier.orcid | Thomas, A. [0000-0003-0026-499X] | - |
Appears in Collections: | Aurora harvest 7 Physics publications |
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