Measurement of branching fractions for B-->eta(c)K(*) decays

Phys Rev Lett. 2003 Feb 21;90(7):071801. doi: 10.1103/PhysRevLett.90.071801. Epub 2003 Feb 21.

Abstract

We report measurements of branching fractions for charged and neutral B-->eta(c)K decays where the eta(c) meson is reconstructed in the K(0)(S)K+/-pi(-/+), K+K-pi(0), K(*0)K-pi(+), and pp; decay channels. The neutral B0 channel is a CP eigenstate and can be used to measure the CP violation parameter sin(2phi(1). We also report the first observation of the B0-->eta(c)K(*0) mode. The results are based on an analysis of 29.1 fb(-1) of data collected by the Belle detector at KEKB.