2-9 July 2014
Valencia, Spain
Europe/Madrid timezone

Charm Mixing and D Dalitz analysis at BESIII

4 Jul 2014, 15:15
Sala 8+9 ()

Sala 8+9

Oral presentation Flavour Physics Flavour Physics


Dr. Shengsen Sun (Institute of High Energy Physics)


We measured the asymmetry A_CP of branching ratios of D0—> K-pi+ in the CP-odd and CP-even eigenstates to be (12.7+/1/3+/-0.7)% based on 2.92fb-1 of data accumulated at psi(3770) at BESIII/BEPCII. The A_CP can be used to extract the strong phase difference delta_Kpi between the double Cabbibo-suppressed process D0b —> K-pi+ and the Cabbibo-favored process D0—>K-pi+. Using the world-average values of external parameters, we obtain cos(\delta_{K\pi}) = 1.02+\-0.11+/-0.06+/-0.01.Here, the first and second uncertainties are statistical and systematic, while the third uncertainty arises from the external parameters. This is the most precise measurement of \delta_{K\pi} to date. We perform an analysis of the D+—>KsPi+pi0 Dalitz plot analysis use a data set of 2.92 fb-1 e+e- collisions at psi(3770) mass accumulated by the BESIII Experiment. The Dalitz plot is found to be well-represented by a combination of six quasi-two-body decay channels(Ks rho, Ks rho(1450), K*0bar pi+, K*0(1430)bar pi+, K(1680)bar pi+ and kapa0bar pi+) plus a small non-resonant component. Using the fractions from this analysis, partial branching ratios are updated with higher precision than previous measurements.

Primary author

Prof. Changzheng YUAN (IHEP, Beijing)

Presentation Materials


Your browser is out of date!

Update your browser to view this website correctly. Update my browser now