We present the results of a Dalitz plot analysis of D0→KS0π0π0 using the CLEO-c data set of 818pb-1 of e+e- collisions accumulated at √s=3.77GeV. This corresponds to 3×106 D0D̄0 pairs from which we select 1259 tagged candidates with a background of 7.5±0.9 percent. Several models have been explored, all of which include the K*(892), K2*(1430), K *(1680), the f0(980), and the σ(500). We find that the combined π0π0 S-wave contribution to our preferred fit is (28.9±6.3±3.1)% of the total decay rate while D0→K ̄*(892)0π0 contributes (65.6±5. 3±2.5)%. Using three tag modes and correcting for quantum correlations we measure the D0→KS0π0π0 branching fraction to be (1.058±0. 038±0.073)%.
|Original language||English (US)|
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|State||Published - Nov 14 2011|
Bibliographical noteFunding Information:
The authors would like to acknowledge the valuable suggestions made by PhD Josep Illa Alib?s (University of Lleida, Department of Informatics and Industrial Engineering) to improve this manuscript. This research was funded by the Spanish Ministry of Economy and Competitiveness (INIA project RTA2012-00096-00-00). The first author was supported by a PhD grant from the Secretariat for Universities and Research of the Ministry of Economy and Knowledge of the Catalan Government (pre-doctoral grant 2013FI-B 00014).