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→ e ν ̄ e ν τ )=(17.806±0.104 ( stat. )±0.076 ( syst. ))% , B (τ→μ ν ̄ μ ν τ )=(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 g μ / g e =1.0007±0.0051. Assuming electron-muon universality, the Fermi constant is measured in tau lepton decays as G F =(1.1616±0.0058)×10 −5 GeV −2 . Furthermore, the coupling constant of the strong interaction at the tau mass scale is obtained as α s (m τ 2 )=0.322±0.009 (exp.) ±0.015 (theor...
Using data collected with the L3 detector near the Z resonance, corresponding to an integrated lumin...
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 lumino...
A sample of 25000 Z0 → τ+τ- events collected by the DELPHI experiment at LEP in 1991 and 1992 is use...
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...
Using data collected with the L3 detector near the Z resonance, corresponding to an integrated lumin...
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 lumino...
A sample of 25000 Z0 → τ+τ- events collected by the DELPHI experiment at LEP in 1991 and 1992 is use...
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...
Using data collected with the L3 detector near the Z resonance, corresponding to an integrated lumin...
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...