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 dτ(mZ) = (1.3 ± 1.4 ± 0.1) × 10-17 e·cm which results in an upper limit on the weak dipole moment of |dτ(mZ)| ≤ 3.7 × 10-17 e·cm with 95% confidence level.

Buskulic, D., Decamp, D., Goy, C., Lees, J., Minard, M., Mours, B., et al. (1992). Search for CP violation in ZmF ττ. PHYSICS LETTERS. SECTION B, 297(3-4), 459-468 [10.1016/0370-2693(92)91285-H].

Search for CP violation in ZmF ττ

CARPINELLI, Massimo;
1992

Abstract

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 dτ(mZ) = (1.3 ± 1.4 ± 0.1) × 10-17 e·cm which results in an upper limit on the weak dipole moment of |dτ(mZ)| ≤ 3.7 × 10-17 e·cm with 95% confidence level.
Articolo in rivista - Articolo scientifico
TAU-LEPTONS; E+E COLLIDERS; Z-DECAYS; T-ODD; APLANARITIES; TESTS
English
459
468
10
Buskulic, D., Decamp, D., Goy, C., Lees, J., Minard, M., Mours, B., et al. (1992). Search for CP violation in ZmF ττ. PHYSICS LETTERS. SECTION B, 297(3-4), 459-468 [10.1016/0370-2693(92)91285-H].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/390445
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