The cross-section ratio of neutral-current and charged-current semileptonic interactions of muon-neutrinos on isoscalar nuclei has been measured with the result: R_v =0.3093±0.0031 for hadronic energy larger than 4 GeV. From this ratio we determined the electroweak mixing angle sin^2(θ_W) , where m c is the charm-quark mass in GeV/c^2. Comparison with direct measurements of m_w and m_z determines the radiative shift of the intermediate boson mass Δ r=0.077±0.025(exp.)±0.038(syst.), in agreement with the prediction. Assuming the validity of the electroweak standard theory we determined ϱ=0.990-0.013( m_c -1.5)±0.009(exp.)±0.003(theor.).

A precise determination of the electroweak mixing angle from semileptonic neutrino scattering

F. FERRONI;
1987

Abstract

The cross-section ratio of neutral-current and charged-current semileptonic interactions of muon-neutrinos on isoscalar nuclei has been measured with the result: R_v =0.3093±0.0031 for hadronic energy larger than 4 GeV. From this ratio we determined the electroweak mixing angle sin^2(θ_W) , where m c is the charm-quark mass in GeV/c^2. Comparison with direct measurements of m_w and m_z determines the radiative shift of the intermediate boson mass Δ r=0.077±0.025(exp.)±0.038(syst.), in agreement with the prediction. Assuming the validity of the electroweak standard theory we determined ϱ=0.990-0.013( m_c -1.5)±0.009(exp.)±0.003(theor.).
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.12571/2142
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