Search for CP violation in Z0 → τ+τ- and an upper limit on the weak dipole moment of the τ lepton

OPAL Collaboration

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

An improved test of script C sign℘ invariance in the reaction e+e- → on the Z0 peak is performed using the data sample recorded between 1991 and 1995 with the OPAL detector at LEP. Optimal observables, requiring the reconstruction of the τ flight direction and spin, have been used for different final state topologies. From the non-observation of script C sign℘ violation we derive 95% confidence level upper limits on the real and imaginary parts of the weak dipole moment of the τ lepton of |Re(dτ w(mZ 2))| < 5.6 × 10-18 e cm and |Im(dτ w(mZ 2))| < 1.5 × 10-17 e cm, respectively.

Original languageEnglish
Pages (from-to)403-412
Number of pages10
JournalZeitschrift fur Physik C-Particles and Fields
Volume74
Issue number3
DOIs
StatePublished - 1 Jan 1997
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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