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The European Physical Journal A

, Volume 36, Issue 1, pp 73–84 | Cite as

Meson loops in the f0(980) and a0(980) radiative decays into ρ , ω

  • H. Nagahiro
  • L. RocaEmail author
  • E. Oset
Regular Article - Theoretical Physics

Abstract.

We calculate the radiative decay widths of the a 0(980) and f 0(980) scalar mesons into ργ and ωγ considering the dynamically generated nature of these scalar resonances within the realm of the chiral unitary approach. The main ingredient in the evaluation of the radiative width of the scalar mesons are the loops coming from the decay into their constituent pseudoscalar-pseudoscalar components and the subsequent radiation of the photon. The dominant diagrams with only pseudoscalar mesons in the loops are found to be convergent while the divergence of those with a vector meson in the loop are written in terms of the two-meson loop function easily regularizable. We provide results for all the possible charge channels and obtain results, with uncertainties, which differ significantly from quark loops models and some version of vector meson dominance.

PACS.

14.40.Cs Other mesons with S = C = 0 , mass < 2.5 GeV 13.25.Jx Decays of other mesons 13.40.Hq Electromagnetic decays 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2008

Authors and Affiliations

  1. 1.Research Center for Nuclear Physics (RCNP)IbarakiOsakaJapan
  2. 2.Departamento de FısicaUniversidad de MurciaMurciaSpain
  3. 3.Yukawa Institute for Theoretical PhysicsKyoto UniversityKyotoJapan
  4. 4.Departamento de Fısica Teórica and IFICCentro Mixto Universidad de Valencia-CSIC, Institutos de Investigación de PaternaValenciaSpain

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