ar X iv : h ep - p h / 99 03 21 7 v 1 1 M ar 1 99 9 RADIATIVE DECAY OF ρ 0 AND φ MESONS IN A CHIRAL UNITARY APPROACH
نویسنده
چکیده
We study the ρ and φ decays into ππγ, ππγ using a chiral unitary approach to deal with the final state interaction of the ππ system. The final state interaction modifies only moderately the large momenta tail of the photon spectrum of the ρ → ππγ decay. In the case of φ decay the contribution to ππγ and ππγ decay proceeds via kaonic loops, which are finite, and gives a distribution of ππ invariant masses in which the f0(980) resonance shows up with a very distinct peak. The spectrum found for φ → ππγ decay agrees with the recent experimental results obtained at Novosibirsk. PACS: 13.25.Jx 12.39.Fe 13.40.Hq
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