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Radiation effects in lepton decays of neutral vector mesons and μ-e universality

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Abstract

A study has been made of the effects of radiation corrections of orderα as regards the probability of lepton decay of a moving neutral vector meson V → e+e− and V → μ+μ− (V = ρ0, ω, ϕ); μ-e universality has been checked by examining the effects of radiation corrections due to exchange of virtual photons between lepton and antilepton, and also to vacuum polarization by e+e− electron and μ+μ−muon closed loops; in addition, a study has been made of the emission of soft photons as regards the partial width for the electron and muon modes of V-meson decay. Closed expressions (1), (4), and (5) for the corrections imply that the ratio ¦Rv¦ for the probabilities of decay of a V meson to e+e− and μ+μ−, which are given by (11), agree well with the available evidence on ρ0 ρ e+e− μ+μ− decays and indicates a possible deviation from μ-e universality in ϕ→ e+e−μ+μ− decays.

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Authors and Affiliations

  1. M. V. Lomonosov Moscow State University, USSR

    B. K. Kerimov & V. P. Tsvetkov

Authors
  1. B. K. Kerimov
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  2. V. P. Tsvetkov
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Additional information

Read at the meeting on high-energy physics, Nuclear Physics Section Academy of Sciences of the USSR (Moscow, February 11–15, 1974).

Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 7, pp. 84–89, July 1975.

We are indebted to Professor A. A. Sokolov for a discussion.

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Kerimov, B.K., Tsvetkov, V.P. Radiation effects in lepton decays of neutral vector mesons and μ-e universality. Soviet Physics Journal 18, 979–983 (1975). https://doi.org/10.1007/BF00894534

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  • DOI: https://doi.org/10.1007/BF00894534

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