Search for CP violation in Z ---> tau tau - INSPIRE

DataBETA

Search for CP violation in Z ---> tau tau

ALEPH

Collaboration

Sep, 1992

10 pages

Published in:

Phys.Lett.B 297 (1992) 459-468

Published: 1992

DOI:

10.1016/0370-2693(92)91285-H

PDG: Re(

\mathit d{}^{\mathit w}_{{{\mathit \tau}}}

Report number:

CERN-PPE-92-161

Experiments:

CERN-LEP-ALEPH

View in:

CERN Document Server

reference search69 citations

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Abstract: (Elsevier)

Using the 18.8 pb −1 of data accumulated at LEP in 1990 and 1991 with the ALEPH detector, a direct test of neutral current CP -invariance is performed by a search for CP -odd correlations in Z decays to τ pairs where both τ decay modes are identified. No evidence for CP -violation is observed. The weak dipole moment of the τ has been measured to be d τ ( m Z ) = (1.3 ± 1.4 ± 0.1) × 10 −17 e ·cm which results in an upper limit on the weak dipole moment of | d τ ( m Z )| ⩽ 3.7 × 10 −17 e ·cm with 95% confidence level.

electron positron: colliding beams
colliding beams: electron positron
electron positron: annihilation
annihilation: electron positron
Z0: electroproduction
electroproduction: Z0
Z0: leptonic decay
leptonic decay: Z0
tau: pair production
pair production: tau

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