• Electroweak tests with τ leptons at LEP

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      https://www.ias.ac.in/article/fulltext/pram/041/S1/0045-0053

    • Abstract

       

      We report on two sensitive tests of lepton universality carried out by the 4 LEP experiments at the Z0 pole. From measurements of the τ polarization in e+ eτ+τ, the ratios of the vector and axial vector coupling constants of the electron and the tau lepton to the weak neutral current are obtained to begve/gae=0.066±0.015 andgVτ/gAτ=0.070±0.009 respectively. From measurement of the τ lifetime and the τ leptonic branching ratios, the ratio of the coupling constants describing weak leptonic decays of the τ and the μ is measured to beGτ/Gμ=0.996±0.008.

    • Author Affiliations

       

      Krishna S Kumar1

      1. Department of Physics, Harvard University, Cambridge, MA - 02138, USA
    • Dates

       
  • Pramana – Journal of Physics | News

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