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Prog. Theor. Phys. Vol. 57 No. 5 (1977) pp. 1679-1692

The Decay η→π⁺π^-π⁰ and the u₃-Term of the (3,3)+(3,3) Model

Yoshimi Matsubara and Seiichi Tameike^*

Department of Physics, Nagoya University, Nagoya 464
^*Department of Physics, Kanazawa University, Kanazawa 920

(Received September 30, 1976)

Abstract:

A detailed analysis of the decay η→π⁺π^-π⁰ is presented based on the u₃-term of the (3,3)+(3,3) model. A perturbation scheme is given in which π⁰-η-η' mixing is treated systematically. It is shown that the rapidly varying pole structures disappear. The slope parameter -2/µ_η is derived in a convincing way. While the rate Γ_+-0 is not determined completely, it is argued that η-pole contribution may not be negligible and that the contribution has a possibility to save the factor 3 discrepancy of the width between the theory and the experiment.

URL : http://ptp.ipap.jp/link?PTP/57/1679/
DOI : 10.1143/PTP.57.1679

[ Full Text PDF : FREE ACCESS (942K) ] Citation: Plain Text BiBTeX EndNote(RIS) RSS

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