Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-01-19
Phys.Lett.B325:495-499,1994; ERRATUM-ibid.B327:439,1994
Physics
High Energy Physics
High Energy Physics - Phenomenology
7 pages, LaTex (uses epsf.sty, 2 figures appended as uuencoded eps files). Errors of some numerical values corrected. Conclusi
Scientific paper
10.1016/0370-2693(94)90045-0
The rate for the final state radiation of hadrons in leptonic $Z$ decays is evaluated, using as input experimental data for $\sigma (e^+e^-\to hadrons)$ in the low energy region. Configurations with a lepton pair of large and a hadronic state of low invariant mass are dominant. A relative rate $\Gamma_{l\bar l had}/\Gamma_{l\bar l}=6.3\times 10^{-4}$ is calculated. This result is about twice the prediction based on a parton model calculation with a quark mass of $300$ MeV. The rate for secondary production of heavy quarks is calculated in the same formalism.
Hoang Andre H.
Jezabek Marek
Kuhn Johann H.
Teubner Thomas
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