Search for CP violation in the decays D+ → KSπ+ and D+ → KSK+
The evidence of direct CP violation in the decays D+ → Ksπ+ and D+ → KsK+ was analyzed by a high-statistics sample of a photoproduced charm from the FOCUS experiment. The branching ratio for the decays were measured relative to each other and to D+ → K-π+π+. The relative branching ratio were improvement over earlier measurements and the measured CP asymmetries for the nodes were found to be consistent with zero.
Link, J. M.; Reyes, M.; Yager, P. M.; Anjos, J. C.; Bediaga, I.; Göbel, C.; Magnin, J.; Massafferri, A.; Kryemadhi, Abaz; and Pepe, I. M., "Search for CP violation in the decays D+ → KSπ+ and D+ → KSK+" (2002). Educator Scholarship & Departmental Newsletters. 223.