Based on 520000 fermion pairs accumulated during the first three years of data collection by the ALEPH detector at LEP, updated values of the resonance parameters of the Z are determined to be M(Z) = (91.187 +/- 0.009) GeV, GAMMA(Z) = (2.501 +/- 0.012) GeV, sigma(had)0 = (41.60 +/- 0.27) nb, and R(l) = 20.78 +/- 0.13. The corresponding number of light neutrino species is N(v) = 2.97 +/- 0.05. The forward-backward asymmetry in lepton-pair decays is used to determine the ratio of vector to axial-vector couplings of leptons: g(V)2(M(Z)2)/g(A)2 (M(Z)2) = 0.0052 +/- 0.00 1 6. Combining this with ALEPH measurements of the b and c quark asymmetries and tau polarization gives sin^2(theta(W))eff = 0.2326 +/- 0.0013. Assuming the minimal Standard Mo...
We report on the properties of the Z resonance from 62500 Z decays into fermion pairs collected with...
We report on the properties of theZ resonance from 62 500Z decays into fermion pairs collected with ...
The properties of the Z resonance are measured from the analysis of 4.5 million Z decays into fermio...
Based on 520000 fermion pairs accumulated during the first three years of data collection by the ALE...
Based on 520000 fermion pairs accumulated during the first three years of data collection by the ALE...
Based on 520 000 fermion pairs accumulated during the first three years of data collection by the AL...
The properties of the Z resonance are measured on the basis of 190000 Z decays into fermion pairs co...
The properties of the Z resonance are measured on the basis of 190000 Z decays into fermion pairs co...
The properties of the Z resonance are measured on the basis of 190000 Z decays into fermion pairs co...
We report on the properties of the Z resonance from 62500 Z decays into fermion pairs collected with...
We report on the properties of theZ resonance from 62 500Z decays into fermion pairs collected with ...
The properties of the Z resonance are measured from the analysis of 4.5 million Z decays into fermio...
Based on 520000 fermion pairs accumulated during the first three years of data collection by the ALE...
Based on 520000 fermion pairs accumulated during the first three years of data collection by the ALE...
Based on 520 000 fermion pairs accumulated during the first three years of data collection by the AL...
The properties of the Z resonance are measured on the basis of 190000 Z decays into fermion pairs co...
The properties of the Z resonance are measured on the basis of 190000 Z decays into fermion pairs co...
The properties of the Z resonance are measured on the basis of 190000 Z decays into fermion pairs co...
We report on the properties of the Z resonance from 62500 Z decays into fermion pairs collected with...
We report on the properties of theZ resonance from 62 500Z decays into fermion pairs collected with ...
The properties of the Z resonance are measured from the analysis of 4.5 million Z decays into fermio...