Physics – High Energy Physics
Scientific paper
Apr 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005iche.conf.1105s&link_type=abstract
HIGH ENERGY PHYSICS, ICHEP 2004. Proceedings of the 32nd International Conference. Held 16-22 August 2004 in Beijing, China. Edi
Physics
High Energy Physics
Scientific paper
The measurement of the partial rate asymmetries for various B → Kπ decay modes is presented. A significant asymmetry is measured for the decay mode B → K+π- with ACP = -0.101 ± 0.025 ± 0.005 which has a significance of 3.9 σ and thus indicates evidence for direct CP violation. Furthermore the first observation of the decay mode B → π0π0 with a branching fraction of {B}(B -> π 0π ^0) = (2.3-0.5+0.4 ± 0.2) × 10-6 having a significance of 6.0 σ is presented accompanied with the first measurement of the CP asymmetry in this mode.
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