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Title: Baryon octet electromagnetic form factors in a confining NJL model

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. Here, 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 p E < r Σ+ E and |r n E| < |r Ξ0 E|, whereas the magnetic radii have a pattern largely consistent with a naive expectation based on the dressed quark masses.
Authors:
 [1] ;  [2] ;  [3] ;  [1]
  1. Univ. of Adelaide, Adelaide SA (Australia)
  2. Tokai Univ., Kanagawa (Japan)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 759; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Baryon octet; Electromagnetic form factors
OSTI Identifier:
1344944
Alternate Identifier(s):
OSTI ID: 1374852