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## Measurement of the transverse spin correlation in $Z \to \tau^+\tau^-$ decays

### Abstract

The measurement of the correlation between the transverse spin components of $\tau^+\tau^-$ pairs collected during 1992 to 1994 with the DELPHI detector at LEP1 is presented. A value \begin{center} $C_{TT}$~=~0.87~$\pm$~0.20~(stat.)~$^{+~0.10}_{-~0.12}$~(syst.) \end{center} was obtained for the correlation parameter, in agreement with the Standard Model expectation

Topics: [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex]
Publisher: Elsevier
Year: 1997
OAI identifier: oai:HAL:in2p3-00003412v1
Provided by: Hal-Diderot
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