Date: Wednesday 22nd October 2003
Title: Observation by BaBar of Two New Narrow Ds States
Speaker: Dr Chris Hawkes (Birmingham)
The BaBar experiment has observed two new Ds states with surprisingly low masses and narrow decay widths. The D*sJ(2317)+ lies below the DK threshold and decays to D+spi0. The DsJ(2458)+ lies above the DK threshold and below the D*K threshold and decays to D+spi0gamma. Both of these decays violate isospin conservation. The analyses will be described and results compared with those from other experiments.