Zeitschrift für Physik C Particles and Fields

, Volume 42, Issue 4, pp 511–518

Radiative decays of ρ and ω mesons

  • S. I. Dolinsky
  • V. P. Druzhinin
  • M. S. Dubrovin
  • V. B. Golubev
  • V. N. Ivanchenko
  • A. P. Lysenko
  • A. A. Mikhailichenko
  • E. V. Pakhtusova
  • A. N. Peryshkin
  • S. I. Serednyakov
  • Yu. M. Shatunov
  • V. A. Sidorov
Article

DOI: 10.1007/BF01557655

Cite this article as:
Dolinsky, S.I., Druzhinin, V.P., Dubrovin, M.S. et al. Z. Phys. C - Particles and Fields (1989) 42: 511. doi:10.1007/BF01557655

Abstract

The results of the measurements of radiative decays of ρ and ω mesons with the Neutral Detector at thee+e collider VEPP-2M are presented. The branching ratio of the decay ω→π0γ was measured with higher than in previous experiments accuracy:
$${\rm B}(\omega \to \pi ^0 \gamma ) = 0.0888 \pm 0.0062$$
.
The ρ0π0γ branching ratio was measured for the first time:
$$B(\rho ^0 \to \pi ^0 \gamma ) = (7.9 \pm 2.0) \cdot 10^{ - 4} $$
.
The decays ρ, ω→ηγ were studied. Their branching ratios with the assumption of constructive ρ−ω interference are:
$$\begin{gathered} B(\omega \to \eta \gamma ) = (7.3 \pm 2.9) \cdot 10^{ - 4} , \hfill \\ B(\rho \to \eta \gamma ) = (4.0 \pm 1.1) \cdot 10^{ - 4} \hfill \\ \end{gathered} $$
.
The branching ratios of ρ, ω→ηγ and ω→e+e decays were also measured:
$$\begin{gathered} B(\omega \to \pi ^ + \pi ^ - \pi ^0 ) = 0.8942 \pm 0.0062, \hfill \\ B(\omega \to e^ + e^ - ) = (7.14 \pm 0.36) \cdot 10^{ - 5} \hfill \\ \end{gathered} $$
.

The upper limit for the ω→π0π0γ branching ratio was placed:

B(ωπ0π0γ)<4·10−4 at 90% confidence level.

Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • S. I. Dolinsky
    • 1
  • V. P. Druzhinin
    • 1
  • M. S. Dubrovin
    • 1
  • V. B. Golubev
    • 1
  • V. N. Ivanchenko
    • 1
  • A. P. Lysenko
    • 1
  • A. A. Mikhailichenko
    • 1
  • E. V. Pakhtusova
    • 1
  • A. N. Peryshkin
    • 1
  • S. I. Serednyakov
    • 1
  • Yu. M. Shatunov
    • 1
  • V. A. Sidorov
    • 1
  1. 1.Institute of Nuclear PhysicsNovosibirskUSSR

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