Prog. Theor. Phys. Vol. 79 No. 5 (1988) pp. 1001-1005

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Letters

Note on Interpretation of the Low-Mass Enhancement Observed in the γγ→π⁺π^- Reaction

Shigeo Minami

Asahigaoka 2-9-17, Ikeda 563

(Received October 8, 1987)

Abstract:

It is shown that (i) the π⁺π^- enhancement observed in the γγ→π⁺π^- reaction near threshold mainly comes from interference between the resonant amplitude for the I = 0 state and the nonresonant amplitude obtained by the Born approximation and (ii) this interpretation is consistent with the observed ratio of σ(γγ→π⁰π⁰) to σ(γγ→π⁺π^-).

URL : http://ptp.ipap.jp/link?PTP/79/1001/
DOI : 10.1143/PTP.79.1001

References:

A. Courau et al., Phys. Lett. B96 (1980), 402.
A. Courau et al., Nucl. Phys. B271 (1986), 1.
Z. Ajaltouni, Proceedings of VIIth International Workshop on Photon-Photon Collisions, Paris, 1986.
S. J. Brodsky, T. Kinoshita and H. Terazawa, Phys. Rev. D4 (1971), 1532[APS].
G. Mennessier, Z. Phys. C16 (1983), 241.
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H. Marsiske, Proceedings of XXIIIrd International Conference on High-Energy Physics, Berkeley, 1986.
J. Olsson, Proceedings of the Vth International Workshop on Photon-Photon Collisions, Aachen, 1983.
H. Spitzer, DESY 83-059 (1983), and references therein.
S. Minami, Lett. Nuovo Cim. 39 (1984), 65.

Citing Article(s) :

Progress of Theoretical Physics Vol. 81 No. 5 (1989) pp. 1064-1070 :
Pion Pair Production in γ-γ Collisions and the Effects of Resonances in the Final-State

Shigeo Minami

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