A measurement of the Z0 leptonic partial widths and the vector and axial vector coupling constants

Adeva, B. ; Adriani, O. ; Aguilar-Benitez, M. ; Gurtu, A. ; et., al (1990) A measurement of the Z0 leptonic partial widths and the vector and axial vector coupling constants Physics Letters B, 238 (1). pp. 122-130. ISSN 0370-2693

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Official URL: http://www.sciencedirect.com/science/article/pii/0...

Related URL: http://dx.doi.org/10.1016/0370-2693(90)92111-U

Abstract

We have measured the partial widths of the Z0 into lepton pairs, and the forward-backward charge asymmetry for the process e+e-→μ+μ using the L3 detector at LEP. We obtain an average Γℓℓ of 83.0±2.1±1.1 MeV.From this result and the asymmetry measurement, we extract the values of the vector and axial vector couplings of the Z0 to leptons: grmv=−0.066−0.027+0.046 and grmA= −0.495−0.007+0.007.

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