Baryon octet electromagnetic form factors in a confining NJL model

被引：20

作者：

Carrillo-Serrano, Manuel E. ^{[1
,2
]}

Bentz, Wolfgang

Cloet, Ian C. ^{[3
,4
]}

Thomas, Anthony W. ^{[1
,2
]}

机构：

[1] Univ Adelaide, CSSM, Adelaide, SA 5005, Australia

[2] Univ Adelaide, ARC Ctr Excellence Particle Phys Terascale, Dept Phys, Adelaide, SA 5005, Australia

[3] Tokai Univ, Sch Sci, Dept Phys, Hiratsuka, Kanagawa 2591292, Japan

[4] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA

来源：

PHYSICS LETTERS B | 2016年 / 759卷

基金：

澳大利亚研究理事会;

关键词：

Baryon octet; Electromagnetic form factors; CLOUDY BAG MODEL; MAGNETIC-MOMENTS; QUARK DISTRIBUTIONS; DYNAMICAL MODEL; SCALING LAWS; NUCLEON; G(EP)/G(MP); ANALOGY; LIGHT;

D O I：

10.1016/j.physletb.2016.05.065

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Electromagnetic form factors of the baryon octet are studied using a Nambu-Jona-Lasinio model which utilizes the proper-time regularization scheme to simulate aspects of colour confinement. In addition, the model also incorporates corrections to the dressed quarks from vector meson correlations in the t-channel and the pion cloud. Comparison with recent chiral extrapolations of lattice QCD results shows a remarkable level of consistency. For the charge radii we find the surprising result that r(E)(p) < r(E)(Sigma+) and vertical bar r(E)(n)vertical bar < vertical bar r(E)(Xi 0)vertical bar, whereas the magnetic radii have a pattern largely consistent with a naive expectation based on the dressed quark masses. (C) 2016 The Author(s). Published by Elsevier B.V.

引用

页码：178 / 183

页数：6

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