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Prog. Theor. Phys. Vol. 28 No. 5 (1962) pp. 904-914

Double Pion Photoproduction and the γ-3π Vertex

Minoru Monda

Department of Physics, Tokyo Metropolitan University, Setagaya, Tokyo

(Received July 23, 1962)

Abstract:

The γ-3π vertex interaction is discussed in order to understand the steep rising of the total cross section for the γ+ p →p + π⁺ + π^- reaction up to E_γ≈550 Mev. The static theory, which includes the final (3, 3) resonance state interaction and the source function for the nucleon, is used. The E1 →sp_3/2 transition is assumed to be large. The meson and nucleon current interactions have small contributions. The so-called interaction current is not enough to explain this steepness. By adding the γ-3π interaction term, we can reproduce the sharp rising if the order of magnitude of the γ-3π coupling constant (λ) is |λ| ∼0.088, which is not inconsistent with the value estimated from other phenomena. We discuss about experiments to test our assumptions made in this paper.

URL : http://ptp.ipap.jp/link?PTP/28/904/
DOI : 10.1143/PTP.28.904

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Citing Article(s) :

1. Progress of Theoretical Physics Vol. 28 No. 5 (1962) pp. 915-933 :

   (γ, 3π) Vertex and Double π⁰ Photoproduction

   Kiyomi Itabashi and Takeshi Ebata

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