Probing the tau electric dipole moment at the BEPC-II collider
Probing the tau electric dipole moment at the BEPC-II collider
We investigate the prospects of the search for a nonzero $\ensuremath{\tau}$ EDM form factor ${d}_{\ensuremath{\tau}}(s)$ in $\ensuremath{\tau}$-pair production by ${e}^{+}{e}^{\ensuremath{-}}$ collisions at BEPC-II collider energies. We compute the expectation values and covariances of simple and optimal $CP$-odd observables for $\ensuremath{\tau}$-pair production at $\sqrt{s}=4.18$ and 4.95 GeV with subsequent decays of …