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Mixing and decays of ρ- and ω-mesons

  • Ya.I. Azimov

Abstract:

Isospin-violating mixing of ρ- and ω-mesons is reconsidered in terms of propagators. Its influence on various pairs of (ρ,ω)-decays to the same final states is demonstrated. Some of them, (ρ,ω)↦π+π- and (ρ,ω)↦πγ, have been earlier discussed in the literature, others (e.g., (ρ,ω)↦ηγ and (ρ,ω)↦e+e-) are new in this context. Changes in partial widths for all the decay pairs are shown to be correlated. The set of present experimental data, though yet inconclusive, provides some limits for the direct (ρω)-coupling and indirectly supports enhancement of ρ↦πγ in comparison with ρ±↦π±γ, though not so large as in some previous estimates.

PACS. 11.30.Ly Other internal and higher symmetries – 13.25.Jx Decays of other mesons – 14.40.Cs Other mesons with S = C = 0, mass < 2.5 GeV 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2003

Authors and Affiliations

  • Ya.I. Azimov
    • 1
  1. 1.Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg, 188300, RussiaRU

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