{phi} meson couplings to the nucleon and strange vector currents

Journal Article · Tue May 20 00:00:00 EDT 1997 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.54262· OSTI ID:21175462

Meissner, Ulf-G; Speth, J ^[1]; Mull, V ^[1]; Van Orden, J W ^[2]

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1. FZ Juelich, IKP (Thailand), D-52425 Juelich (Germany)
2. TJNAF, Newport News, Virginia 23606 (United States)

We investigate within a meson-exchange model the OZI allowed coupling of the {phi} meson to the nucleon with the inclusion of kaon loops and hyperon excitations. All parameters of the model have previously been determined from a variety of hadronic reactions. A strong cancellation of the various contributions is observed which results in a small {phi}NN coupling. We also show that a realistic isoscalar spectral function including the correlated {pi}{rho} exchange leads to sizeably reduced strange vector form factors based on the dispersion-theoretical analysis of the nucleons' electromagnetic form factors explaining our previous result.

• OSTI ID: 21175462
• Journal Information: AIP Conference Proceedings, Vol. 412, Issue 1; Conference: 6. conference on the intersections of particle and nuclear physcis, Big Sky, MT (United States), 25 May - 2 Jun 1997; Other Information: DOI: 10.1063/1.54262; (c) 1997 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSON-EXCHANGE MODELS
COUPLING
DISPERSION RELATIONS
ELECTROMAGNETIC FORM FACTORS
EXCITATION
HYPERONS
KAONS
NUCLEONS
PHI MESONS
RHO-770 MESONS
SPECTRAL FUNCTIONS
VECTOR CURRENTS