ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2003, vol. 90, p. 071801/1-071801/6
Measurement of branching fractions for B → η cK(*) decays
An overview is given on new measurements of B → η cK branching fractions with the η c meson reconstructed in the K S 0K +π -, K -K +π 0, K *0K -π +, and p̄p channels. These signals are large enough to be used to determine the mass and width of the η c meson. Furthermore, the first observation of the related decay mode B 0 → η cK *0 is discussed. When K *0 → K S 0π 0, this decay mode is also a CP eigenstate.