Upper Limits on Electric and Weak Dipole Moments of Tau-Lepton and Heavy Quarks from e+e- Annihilation
Abstract
The total cross-sections measured at LEP for e+e- annihilation into tau+tau-, cc and bb at 2E ~ 200 GeV are used to derive the upper limits 3*10-17, 5*10-17, 2*10-17 e*cm for the electric dipole moments and 4*10-17, 7*10-17, 2.5*10-17 e*cm for the weak dipole moments of the tau-lepton, c-, and b-quarks, respectively. Some of the existing limits on these moments are improved and for the b-quark the improvement is rather significant.
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