Journalartikel

Jahr der Veröffentlichung: 2001

Seiten: 808-822

Zeitschrift: Nuclear Physics A: Nuclear and Hadronic Physics

Bandnummer: 688

Heftnummer: 3-4

ISSN: 0375-9474

Open Access Status: Green

DOI Link: https://doi.org/10.1016/S0375-9474(00)00583-2

Verlag: Elsevier

Abstract: 
We estimate the resonance couplings strength f(RN omega) and f(RN rho) from a Vector Meson Dominance (VMD) analysis. The isoscalar and isovector part of the photon coupling are obtained separately from helicity amplitudes. The reliability of this approach is tested by comparing VMD predictions fur f(RN rho) with values obtained from fitting the hadronic decay widths into N rho. A reasonable agreement is found, but VMD tends to underestimate the coupling constants. In order to confirm consistency with experimental data, we calculate the cross-sections for photon- and pion-induced reactions within a Breit-Wigner model. Finally, we study how the properties of omega mesons in nuclear matter are affected from the excitation of resonance-hole loops. For an omega at rest, we find a broadening of about 40 MeV, while at higher momenta the effect of resonance excitations is reduced. (C) 2001 Elsevier Science B.V. All rights reserved.

Harvard-Zitierstil: Post, M. and Mosel, U. (2001) Coupling of baryon resonances to the Nω channel, Nuclear Physics A: Nuclear and Hadronic Physics, 688(3-4), pp. 808-822. https://doi.org/10.1016/S0375-9474(00)00583-2

APA-Zitierstil: Post, M., & Mosel, U. (2001). Coupling of baryon resonances to the Nω channel. Nuclear Physics A: Nuclear and Hadronic Physics. 688(3-4), 808-822. https://doi.org/10.1016/S0375-9474(00)00583-2