On a Radiative Decay of Σ^+

概要

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The radiative decay of Σ^+ is examined by using a dispersion theoretic method. The matrix element is related to those of the pion-photoproduction from proton and the ordinary Σ^+-decay in the lowest mass approximation. In order to obtain the real part of the matrix element, according to Fujii-Iwata's rule we introduce the parameter which reflects the damping behavior of the decay matrix element corresponding to the increase of Q-values. Concerning the effective interaction of Σ^+→n^0+π^+, we assumed the conventional type, i. e. a^++b^+γ_5. Examining our results in the light of the observed decay rate, we conclude that b+ may be excluded in some accuracy as seen in Table II.
理論物理学刊行会の論文
1961-10-25