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

TL;DR

This paper reports the first measurement of the branching fraction for B+- -> chi_c0 K+-, using data from the BABAR detector, providing insights into charmonium production in B decays.

Contribution

It presents the first measurement of the B+- -> chi_c0 K+- branching fraction, combining two decay channels to improve accuracy.

Findings

Measured BR(B+- -> chi_c0 K+-) = (2.4 +- 0.7) x 10^-4

Used 75 million BB pairs from BABAR data

Reconstructed chi_c0 via pi+ pi- and K+ K- decays

Abstract

We present preliminary results for the measurement of the branching fraction of the decay B+- -> chi_c0 K+- from a sample of 75 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-) = (1.08 +- 0.35 (stat) +- 0.10 (syst))*10^-6 and BR(B+- -> chi_c0 K+-) * BR(chi_c0 -> K+ K-) = (1.48 +- 0.44 (stat) +- 0.17 (syst)) * 10^-6. Using the known values for the chi_c0 decays branching fractions, we combined these results to obtain BR(B+- -> chi_c0 K+-) = (2.4 +- 0.7) * 10^-4.