## Abstract

We have measured the branching fractions for the exclusive decay modes B→χ_{c1(2)}K(K*) using a 140 fb^{-1} data sample collected by the Belle detector at the KEKB asymmetric-energy e ^{+}e^{-} collider. The measured branching fractions for B ^{+}→χ_{c1}K^{+}, B^{0}→χ _{c1}K^{0}, B^{0}→χ_{c1}K* ^{0} and B^{+}→χ_{c1}K*^{+} decay modes are (4.5±0.2±0.5)×10^{-4}, (3.5±0.3±0.5)×10^{-4}, (3.1±0.3±0.7) ×10^{-4} and (4.1±0.6±0.9)×10^{-4}, respectively, where the first error is statistical and the second error is systematic. We do not observe statistically significant signals for the B→χ_{c2}K(K*) decay modes and set upper limits at the 90% confidence level. We also study the helicity distribution for B→χ_{c1}K* decay mode and show that the longitudinal polarization component is dominant.

Original language | English |
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Pages (from-to) | 155-164 |

Number of pages | 10 |

Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |

Volume | 634 |

Issue number | 2-3 |

DOIs | |

Publication status | Published - 2006 Mar 9 |

## Keywords

- B-meson
- Branching fractions
- Charmonium
- Polarization

## ASJC Scopus subject areas

- Nuclear and High Energy Physics

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