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Role of the ππ interaction in pairwise photoproduction of π 0 mesons on a proton

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Abstract

Photoproduction of two neutral pions on a proton is considered. Qualitative analysis of the available experimental data demonstrates that a linear dependence of the total cross section on the energy testifies to the dominating contribution of s-waves for E γ  < 800 MeV. Since in the tree approximation, the s-wave is almost completely absent from the π 0 π 0 channel, the effects of π + π − meson rescattering into the neutral channel are included in calculations. Owing to the high intensity of π + π − pair formation, the influence of rescattering appears considerable. Its consideration yields a better agreement with the available experimental data.

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Authors and Affiliations

  1. Tomsk State University, Tomsk, Russia

    M. V. Egorov

  2. National Research Tomsk Polytechnic University, Tomsk, Russia

    A. I. Fiks

Authors
  1. M. V. Egorov
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  2. A. I. Fiks
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Correspondence to M. V. Egorov.

Additional information

Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 4, pp. 58–63, April, 2011.

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Egorov, M.V., Fiks, A.I. Role of the ππ interaction in pairwise photoproduction of π 0 mesons on a proton. Russ Phys J 54, 458–464 (2011). https://doi.org/10.1007/s11182-011-9639-7

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  • DOI: https://doi.org/10.1007/s11182-011-9639-7

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