Using data collected with the L3 detector near the Z resonance, corresponding to an integrated luminosity of 150 pb−1, the branching fractions of the tau lepton into electron and muon are measured to be B(τ→eν̅eντ) = (17.806±0.104 (stat.) ± 0.076 (syst.) %, B(τ→μν̅ντ) = (17.342±0.110 (stat.) ± 0.067 (syst.) %. From these results the ratio of the charged current coupling constants of the muon and the electron is determined to be gμ/ge=1.0007±0.0051. Assuming electron-muon universality, the Fermi constant is measured in tau lepton decays as GF=(1.1616±0.0058)×10−5 GeV−2. Furthermore, the coupling constant of the strong interaction at the tau mass scale is obtained as αs(m2τ) = 0.322 ± 0.009(exp.) ± 0.015 (theory)
A sample of 25000 \Z\rightarrow\tt events collected by the DELPHI experiment at LEP in 1991 and 1992...
A sample of 25000 Z(0) --> tau(-)tau(+) events collected by the DELPHI experiment at LEP in 1991 and...
A sample of 25000 Z(0) --> tau(-)tau(+) events collected by the DELPHI experiment at LEP in 1991 and...
Using data collected with the L3 detector near the Z resonance, corresponding to an integrated lumin...
Using data collected with the L3 detector near the Z resonance, corresponding to an integrated lumin...
Using data collected with the L3 detector near the Z resonance, corresponding to an integrated lumin...
Using data collected with the L3 detector near the Z resonance corresponding to an integrated lumino...
A sample of 25000 Z0 → τ+τ- events collected by the DELPHI experiment at LEP in 1991 and 1992 is use...
Using data collected with the L3 detector near the Z resonance, corresponding to an integrated lumin...
A sample of 25000 \Z\rightarrow\tt events collected by the DELPHI experiment at LEP in 1991 and 1992...
A sample of 25000 \Z\rightarrow\tt events collected by the DELPHI experiment at LEP in 1991 and 1992...
A sample of 25000 Z(0) --> tau(-)tau(+) events collected by the DELPHI experiment at LEP in 1991 and...
A sample of 25000 Z(0) --> tau(-)tau(+) events collected by the DELPHI experiment at LEP in 1991 and...
Using data collected with the L3 detector near the Z resonance, corresponding to an integrated lumin...
Using data collected with the L3 detector near the Z resonance, corresponding to an integrated lumin...
Using data collected with the L3 detector near the Z resonance, corresponding to an integrated lumin...
Using data collected with the L3 detector near the Z resonance corresponding to an integrated lumino...
A sample of 25000 Z0 → τ+τ- events collected by the DELPHI experiment at LEP in 1991 and 1992 is use...
Using data collected with the L3 detector near the Z resonance, corresponding to an integrated lumin...
A sample of 25000 \Z\rightarrow\tt events collected by the DELPHI experiment at LEP in 1991 and 1992...
A sample of 25000 \Z\rightarrow\tt events collected by the DELPHI experiment at LEP in 1991 and 1992...
A sample of 25000 Z(0) --> tau(-)tau(+) events collected by the DELPHI experiment at LEP in 1991 and...
A sample of 25000 Z(0) --> tau(-)tau(+) events collected by the DELPHI experiment at LEP in 1991 and...