| Autor: |
Bramon, A, Escribano, R, Lucio M, J.L, Napsuciale, M |
| Zdroj: |
Physics Letters B; October 2001, Vol. 517 Issue: 3-4 p345-354, 10p |
| Abstrakt: |
The complementarity between chiral perturbation theory and the linear sigma model in the scalar channel is exploited to study π0π0production in ρand ωradiative decays, where the effects of a low mass scalar resonance σ(500) should manifest. The recently reported data on ρ→π0π0γseem to require the contribution of a low mass and moderately narrow σ(500). The properties of this controversial state could be fixed by improving the accuracy of these measurements. Data on ω→π0π0γcan also be accommodated in our framework, but are much less sensitive to the σ(500) properties. |
| Databáze: |
Supplemental Index |
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