Production of $({\tau }^{+}{\tau }^{-}{)}_b$ in electron positron collisions

Abstract

$({\tau }^{+}{\tau }^{-}{)}_b$ is an atom of simple hydrogenlike structure similar to positronium $(e^{+}{e}^{-}{)}_b$ and $({\mu }^{+}{\mu }^{-}{)}_b$. In this paper energy levels and decay widths of different decay channels of $({\tau }^{+}{\tau }^{-}{)}_b$ 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 886 $({\tau }^{+}{\tau }^{-}{)}_b$ atoms may be produced at BEPCII and 29 $({\tau }^{+}{\tau }^{-}{)}_b$ atoms are produced at VEPP-4M under the present experimental conditions.

Comments: 5 pages, submitted to Int. Jour. Mod. Phys. A