Eur. Phys. J. C 20, 401-430 (2001)
Measurement of the Tau Polarisation at LEPThe ALEPH Collaboration A. Heister and et al.
Physikalisches Institut das RWTH-Aachen, 52056 Aachen, Germany
(Received: 2 March 2001 / Published online: 8 June 2001 -© Springer-Verlag / Società Italiana di Fisica 2001)
The polarisation of 's produced in Z decay is measured using 160 pb-1 of data accumulated at LEP by the ALEPH detector between 1990 and 1995. The variation of the polarisation with polar angle yields the two parameters and which are consistent with the hypothesis of e- universality. Assuming universality, the value is obtained from which the effective weak mixing angle is derived.
© Società Italiana di Fisica, Springer-Verlag 2001