Measurement of the D_(sJ)(2317) and D_(sJ)(2460) Properties in e^+ e^- --> c c-bar Production

TL;DR

This paper reports measurements of the masses of the D_{sJ}(2317) and D_{sJ}(2460) mesons using e+e- collision data, including searches for their decay modes and possible partner states.

Contribution

First precise mass measurements of D_{sJ}(2317) and D_{sJ}(2460) mesons in e+e- collisions, with searches for decay channels and partner states.

Findings

Mass of D_{sJ}(2317) measured as 2318.9 MeV/c^2

Mass of D_{sJ}(2460) measured as 2459.4 MeV/c^2

No evidence found for neutral or doubly-charged partners

Abstract

The properties of the $\DsTT$ and $\DsFE$ mesons are studied using 125 ${\rm fb}^{-1}$ of $e^+e^- \to c \bar{c}$ data collected by the BaBar experiment. Preliminary mass estimates of $[2318.9\pm 0.3 ({\rm stat.}) \pm 0.9 ({\rm syst.})]$ \mevcc and $[2459.4 \pm 0.3 ({\rm stat.}) \pm 1.0 ({\rm syst.})]$ \mevcc are obtained. Searches are performed for the decay to the $D_s^+$ meson along with one or more $\piz$, $\pi^+$, or $\gamma$ particles. A search is also performed for neutral and doubly-charged partners.