Measurement of CP asymmetry in B0→Ks0π0π0 decays
Abstract
We present a measurement of the time-dependent CP asymmetry for the neutral B-meson decay into the CP=+1 final state KS0π0π0, with KS0→π+π-. We use a sample of approximately 227 million B-meson pairs recorded at the Υ(4S) resonance with the BABAR detector at the PEP-II B-Factory at SLAC. From an unbinned maximum likelihood fit, we extract the mixing-induced CP-violation parameter S=0.72±0.71±0.08 and the direct CP-violation parameter C=0.23±0.52±0.13, where the first uncertainty is statistical and the second systematic.
- Publication:
-
Physical Review D
- Pub Date:
- October 2007
- DOI:
- 10.1103/PhysRevD.76.071101
- arXiv:
- arXiv:hep-ex/0702010
- Bibcode:
- 2007PhRvD..76g1101A
- Keywords:
-
- 13.25.Hw;
- 11.30.Er;
- 12.15.Hh;
- Decays of bottom mesons;
- Charge conjugation parity time reversal and other discrete symmetries;
- Determination of Kobayashi-Maskawa matrix elements;
- High Energy Physics - Experiment
- E-Print:
- 8 pages, 6 figures, submitted to Phys. Rev. D (Rapid Communications)