Measurement of the Branching Fraction for B+- --> chi_c0 K+-

TL;DR

This paper reports a precise measurement of the branching fraction for the decay B+- --> chi_c0 K+-, using data from the BaBar experiment, providing important insights into B meson decay processes.

Contribution

First measurement of the B+- --> chi_c0 K+- branching fraction using chi_c0 decay modes in BaBar data.

Findings

BR(B+- --> chi_c0 K+-) = (2.7+-0.7) x 10^-4

Measured product branching fractions for chi_c0 decays

Data sample of 89 million BB pairs

Abstract

We present a measurement of the branching fraction of the decay B+- --> chi_c0 K+- from a sample of 89 million BB pairs collected by the BaBar detector at the PEP-II asymmetric-energy B Factory at SLAC. The chi_c0 meson is reconstructed through its two-body decays to pi+ pi- and K+ K-. We measure BR(B+- --> chi_c0 K+-)* BR(chi_c0 --> pi+ pi-) = (1.32^{+0.28}_{-0.27}(stat) +- 0.09(syst))*10^-6 and BR(B+- --> chi_c0 K+-) * BR(chi_c0 --> K+ K-) = (1.49^{+0.36}_{-0.34}(stat) +- 0.11(syst))* 10^-6. Using the known values for the chi_c0 decays branching fractions, we combine these results to obtain BR(B+- --> chi_c0 K+-) = (2.7+-0.7)* 10^-4.