Tau Polarization Measurements at LEP and SLC

Oct, 1989
5 pages
Published in:
  • Phys.Lett.B 235 (1990) 198-202
  • Published: 1990
Report number:
  • MAD-PH-532,
  • KEK-TH-238,
  • DTP-89-42,
  • KEK-PREPRINT-89-155

Citations per year

1990199820062014202205101520
Abstract: (Elsevier)
A precision determination of sin 2 θ w at LEP and SLC is based on observations of e − e + →τ − τ + using τ→πv decays to determine the τ polarization. We describe how the accuracy can be significantly improved by (i) observing the decays τ→ϱv and τ→a 1 v with the subsequent ϱ→ππ and a 1 →πππ decays acting as polarization analysers, and (ii) using polarization correlations measurable in the double (τ − τ + ) decay distribution.
  • electron positron: annihilation
  • electron: polarized beam
  • tau: electroproduction
  • tau: pair production
  • tau: decay modes
  • tau: polarization
  • angular distribution: asymmetry
  • Weinberg angle
  • numerical calculations
  • proposed experiment: CERN LEP Stor