One-loop calculations of hyperon polarizabilities under the large N_c consistency condition

Details One-loop calculations of hyperon polarizabilities under the large N_c consistency condition One-loop calculations of hyperon polarizabilities under the large N_c consistency condition

Publishing date

1999-11-22

URL

arxiv.org/abs/nucl-th/9911071v1

Journals

Phys.Rev. C61 (2000) 055204

Science

Physics

Field

Nuclear Physics

SubField

Nuclear Theory

Additional info

17 pages, REVTeX, no figures

Type

Scientific paper

Digital Object Identifier

10.1103/PhysRevC.61.055204

Abstract

The spin-averaged electromagnetic polarizabilities of the hyperons $\Lambda$ and $\Sigma$ are calculated within the one-loop approximation by use of the dispersion theory. The photon and meson couplings to hyperons are determined so as to satisfy the large N_c consistency condition. It is shown that in order for the large N_c consistency condition to hold exotic hyperon states such as $\Sigma^{**}$ with I=2 and J=3/2 are required in the calculation of the magnetic polarizability of the $\Sigma$ state.

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