Analysis of the Tau Polarization and its Forward-Backward Asymmetry on the Z0

Details Analysis of the Tau Polarization and its Forward-Backward Asymmetry on the Z0 Analysis of the Tau Polarization and its Forward-Backward Asymmetry on the Z0

1996-06-18

arxiv.org/abs/hep-ex/9606011v1

Physics

High Energy Physics

High Energy Physics - Experiment

PhD Thesis, Tel Aviv University

Scientific paper

This thesis describes a new a measurement of the tau lepton polarization and its forward-backward asymmetry at the Z resonance using the OPAL detector. This measurement is based on analyses of the tau->electron, muon and pion (Kaon) decays from a sample of 30663 tau-pair events collected in the polar angle range of Abs(cos(theta)) <0.68 during the 1990-1992 data taking period. Taking then the Standard Model with the V-A structure of the tau lepton decay, we measure the average tau polarization to be =(-13.5+/-2.9+/-2.2)% and the tau polarization forward-backward asymmetry to be AFBpol=(-11.0+/-3.5+/-0.5)% where the first error is statistical and the second systematic. Combining these figures with the OPAL and AFBpol measured with the tau->rho channel we get an average tau polarization, =(-14.9+/-1.9+/-1.3)% and for the asymmetry in the polarization, AFBpol=(-8.9+/-2.2+/-0.9)% . These results are consistent with lepton universality. Combining the two results we obtain for the electroweak mixing angle the value sin^2(theta_W)=0.2331+/-0.0023 within the context of the Standard Model, where the error includes both statistical and systematic uncertainties.

Affiliated with

Also associated with

No associations

Rating

Analysis of the Tau Polarization and its Forward-Backward Asymmetry on the Z0 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Analysis of the Tau Polarization and its Forward-Backward Asymmetry on the Z0, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Analysis of the Tau Polarization and its Forward-Backward Asymmetry on the Z0 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-681251