Octet Baryon Electromagnetic Form Factors in a Relativistic Quark Model

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We study the octet baryon electromagnetic properties by applying the covariant spectator quark model, and provide covariant parametrization that can be used to study baryon electromagnetic reactions. While we use the lattice QCD data in the large pion mass regime (small pion cloud effects) to determine the parameters of the model in the valence quark sector, we use the nucleon physical and octet baryon magnetic moment data to parameterize the pion cloud contributions. The valence quark contributions for the octet baryon electromagnetic form factors are estimated by extrapolating the lattice parametrization in the large pion mass regime to the physical ... continued below

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054014

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Gilberto Ramalho, Kazuo Tsushima September 1, 2011.

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We study the octet baryon electromagnetic properties by applying the covariant spectator quark model, and provide covariant parametrization that can be used to study baryon electromagnetic reactions. While we use the lattice QCD data in the large pion mass regime (small pion cloud effects) to determine the parameters of the model in the valence quark sector, we use the nucleon physical and octet baryon magnetic moment data to parameterize the pion cloud contributions. The valence quark contributions for the octet baryon electromagnetic form factors are estimated by extrapolating the lattice parametrization in the large pion mass regime to the physical regime. As for the pion cloud contributions, we parameterize them in a covariant, phenomenological manner, combined with SU(3) symmetry. We also discuss the impact of the pion cloud effects on the octet baryon electromagnetic form factors and their radii.

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054014

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  • Journal Name: Physical Review. D, Particles, Fields, Gravitation and Cosmology; Journal Volume: 84; Journal Issue: 5

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  • Report No.: JLAB-THY-11-1468
  • Report No.: DOE/OR/23177-2079
  • Report No.: arXiv:1107.1791
  • Grant Number: AC05-06OR23177
  • DOI: 10.1103/PhysRevD.84.054014 | External Link
  • Office of Scientific & Technical Information Report Number: 1039572
  • Archival Resource Key: ark:/67531/metadc834860

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • September 1, 2011

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  • May 19, 2016, 3:16 p.m.

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  • Aug. 3, 2016, 6:40 p.m.

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Gilberto Ramalho, Kazuo Tsushima. Octet Baryon Electromagnetic Form Factors in a Relativistic Quark Model, article, September 1, 2011; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc834860/: accessed September 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.