Measurement of Charm Production Cross Sections in e+e- Annihilation at Energies between 3.97 and 4.26 GeV

TL;DR

This study measures charm meson production cross sections in e+e- collisions between 3.97 and 4.26 GeV, providing detailed data on various final states and searching for resonant enhancements.

Contribution

It provides the first comprehensive set of inclusive and exclusive charm production cross sections across this energy range, including states with and without pions.

Findings

No enhancement observed at the Y(4260) energy.

Detailed cross sections for multiple charm meson final states.

Data supports understanding of charm production mechanisms.

Abstract

Using the CLEO-c detector at the Cornell Electron Storage Ring, we have measured inclusive and exclusive cross sections for the production of D+, D0 and Ds+ mesons in e+e- annihilations at thirteen center-of-mass energies between 3.97 and 4.26 GeV. Exclusive cross sections are presented for final states consisting of two charm mesons (DD, D*D, D*D*, Ds+Ds-, Ds*+Ds-, and Ds*+Ds*-) and for processes in which the charm-meson pair is accompanied by a pion. No enhancement in any final state is observed at the energy of the Y(4260).