Soviet Physics Journal

, Volume 20, Issue 5, pp 589–592 | Cite as

Leptonic decays of vector mesons and a possible μ+μ resonance

  • B. K. Kerimov
  • A. A. Sokolov
  • V. P. Tsvetkov


The possible existence of a vector leptonic resonance (χ0) in the μ+μ system is considered. We discuss the effect such a resonance would have on the g factor of the muon and also on the ratio of the partial widths of the muonic and electronic decay modes (RV = Γ (V → μ+μ)/G (V → e+ e)) of the neutral vector mesonsρ0,ω,ϕ,ψ, andψ′. From the experimental values of Rρ and Rϕ, the following values are obtained for the mass, coupling constant, and partial decay widths of the resonance: M = 872 ± 60 MeV, f2/4π = 4 ± 2) ·10−4, Γ(χ0μ+μ) = 0.12±0.06 MeV, and Γ (χ0 → ρ0 → π+π) = 0.13±0.06 MeV.


Decay Mode Decay Width Vector Meson Partial Width Leptonic Decay 
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Copyright information

© Plenum Publishing Corporation 1978

Authors and Affiliations

  • B. K. Kerimov
    • 1
  • A. A. Sokolov
    • 1
  • V. P. Tsvetkov
    • 1
  1. 1.M. V. Lomonosov Moscow State UniversityUSSR

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