Measurement of $e^+e^-\to D_s^{(*)+} D_s^{(*)-}$ cross sections near threshold using initial-state radiation

Abstract

We report a measurement of exclusive $e^+e^-\to D_s^{(*)+} D_s^{(*)-}$ cross sections as a function of center-of-mass energy near $D_s^{(*)+} D_s^{(*)-}$ threshold with initial-state radiation. The analysis is based on a data sample collected with the Belle detector with an integrated luminosity of $967\,\mathrm{fb}^{-1}$.