Abstract
Quantum chromodynamics methods are used to calculate the section of the reaction γγ → a0 → π0η with formation as an intermediate state of the meson a0(980), which is interpreted as a bound state of two quark-antiquark pairs, formed upon dissociation of two virtual photons, with which an electron and positron are exchanged in incident e−- and e+-beams. It is shown that the a0 → 2π0 decay is significantly more suppressed than the a0 → π0η decay.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 7, pp. 19–23, July, 1991.
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Iskhakov, I.F. Interpretation of the a0(980) meson as a four-quark system. Soviet Physics Journal 34, 578–582 (1991). https://doi.org/10.1007/BF00897983
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DOI: https://doi.org/10.1007/BF00897983