PRODUCTION OF (τ+τ-) IN ELECTRON–POSITRON COLLISIONS

(τ+τ-) is an atom of simple hydrogenlike structure similar to positronium (e-e+) and (μ+μ-). In this paper energy levels and decay widths of different decay channels of (τ+τ-) are given. Cross-section of production of this atomic system in e-e+ annihilation taking into account radiative corrections is calculated. According to our estimates 31 (τ+τ-) atoms are produced at VEPP-4M and 943 (τ+τ-) atoms may be produced at BEPCII under the present experimental conditions.