Branching Fraction Measurements of Charged B Decays to K*+K+K-, K*+pi+K-, K*+K+pi- and K*+pi+pi- Final States

الأصل · EN

Branching fraction and asymmetry measurements of charmless B+→ K*⁺h+₁h-₂ (where h₁,₂ = K, π) decays are presented, using a data sample of 232 million Υ(4S) → BB decays collected with the BaBar detector at the SLAC PEP-II asymmetric-energy B factory. Using a maximum likelihood fit, the following branching fraction results were obtained: B(B+ → K*⁺K+ K-) = (36.2 ± 3.3 ± 3.6) × 10⁻⁶ and B(B+ → K*⁺π+π-) = (75.3 ± 6.0 ± 8.1) × 10⁻⁶. Upper limits were set for B(B+ → K*⁺π+ K-) < 11.8 × 10⁻⁶ and B(B+ → K*⁺K+ π-) < 6.1 × 10⁻⁶ at 90% confidence level. The charge asymmetries for the decays B+ → K*⁺K+ K- and B+ → K*⁺π+π- were measured to be AK*KK = 0.11 ± 0.08 ± 0.03 and Aₖ*ππ = 0.07 ± 0.07 ± 0.04, respectively. The first error quoted on branching fraction and asymmetry measurements is statistical and the second systematic.