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 tau pairs where both tau decay modes are identified. No evidence for CP-violation is observed. The weak dipole moment of the tau has been measured to be d(tau)(m(Z)) = (1.3 +/- 1.4 +/- 0.1) x 10(-17)e.cm which results in an upper timit on the weak dipole moment of \d(tau)(m(Z))\ less-than-or-equal-to 3.7 x 10(-17)e.cm with 95% confidence level.
Titolo: | SEARCH FOR CP VIOLATION IN Z-]TAU-TAU | |
Autori: | ||
Data di pubblicazione: | 1992 | |
Rivista: | ||
Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/0370-2693(92)91285-H | |
Handle: | http://hdl.handle.net/11384/3609 | |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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