The decay of D0 → K-π+ is a golden channel in the study of D0-D̄0 mixing at ψ(3770). The requirements of excellent K/π separation will play an essential role in the mixing search. A technique was developed to precisely extract event start time (to) with TOF measurements in multiple charged tracks event at BESIII. After the to extracting algorithm, the time resolution of double-layer TOF reduced from ∼78ps to ∼64ps, the upper limit of D 0-D̄0 mixing rate at 95% CL can be improved by a factor of 7% in 20fb-1 ψ(3770) data.
|Original language||English (US)|
|Number of pages||8|
|Journal||Kao Neng Wu Li Yu Ho Wu Li/High Energy Physics and Nuclear Physics|
|State||Published - May 2007|
- D-D mixing
- D→K π particle identification
- Event start time