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
1992
297
3-4
459
468
none
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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