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Coupling strength of the N*(1535)S11 to the K+Λ channel

T. Mart
Phys. Rev. C 87, 042201(R) – Published 1 April 2013

Abstract

The N*(1535)S11 coupling strength to the K+Λ channel, gN*(1535)ΛK+, is extracted from the latest and largest K+Λ photoproduction database by using an isobar model. It is found that the coupling is small. In terms of the coupling ratio the best result is R|gN*(1535)ΛK+/gN*(1535)ηp|=0.460±0.172, much smaller than that obtained from the isobar analysis of the J/ψ decays, i.e., 1.3±0.3, but consistent with the results of the unitary chiral approach of the same decay processes as well as the partial wave analysis of kaon photoproduction, i.e., R=0.50.7. The different results of R found here and in the literature to date suggest that a more solid definition of the coupling constant, especially in the case of the N*(1535)S11 state, is urgently required before a fair comparison can be made.

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  • Received 17 September 2012

DOI:https://doi.org/10.1103/PhysRevC.87.042201

©2013 American Physical Society

Authors & Affiliations

T. Mart

  • Departemen Fisika, FMIPA, Universitas Indonesia, Depok 16424, Indonesia

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Issue

Vol. 87, Iss. 4 — April 2013

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