Extended vector meson dominance model for the baryon octet electromagnetic form factors

Journal Article · Mon Apr 01 00:00:00 EST 1996 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.53.1580· OSTI ID:282116

Williams, R A; Puckett-Truman, C ^[1]

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1. Continuous Electron Beam Accelerator Facility, Newport News, Virginia 23606 (United States)

An unresolved issue in the present understanding of nucleon structure is the effect of hidden strangeness on electromagnetic observables such as {ital G}{sup {ital n}}{sub {ital E}}({ital q}{sup 2}). Previously, we have shown that {ital G}{sup {ital n}}{sub {ital E}}({ital q}{sup 2}) is sensitive to small {phi}{ital NN} couplings. A complementary approach for understanding effects due to strangeness content and the Okubo-Zweig-Iizuka (OZI) rule is to investigate the electromagnetic structure of hyperons. We apply Sakurai{close_quote}s universality limit of the SU(3){sub {ital F}} symmetry relations and a prescription based on the OZI rule to calculate the electromagnetic form factors of the baryon octet states ({ital p},{ital n},{Lambda},{Sigma}{sup +},{Sigma}{sup 0},{Sigma}{sup {minus}},{Xi}{sup 0},{Xi}{sup {minus}}) within the framework of an extended vector meson dominance model. To provide additional motivation for experimental investigation, we discuss the possibility of extracting the ratio {ital G}{sub {ital M}}{sup {Lambda}}({ital q}{sup 2})/{ital G}{sub {ital M}}{sup {Sigma}{Lambda}}({ital q}{sup 2}) from the {Lambda}/{Sigma} polarization ratio in kaon electroproduction experiments. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 282116
• Journal Information: Physical Review, C, Vol. 53, Issue 4; Other Information: PBD: Apr 1996
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BARYON OCTETS
ELECTROMAGNETIC FORM FACTORS
VECTOR DOMINANCE MODEL
MESONS
NUCLEONS
STRANGENESS
SU-3 GROUPS
POLARIZATION
ELECTROPRODUCTION