Observation of B+ -> chi_c0 K+

TL;DR

This paper reports the first observation of the decay B+ -> chi_c0 K+ using data from the Belle detector, measuring its branching fraction with statistical and systematic uncertainties.

Contribution

It presents the first experimental evidence of the B+ -> chi_c0 K+ decay mode and measures its branching fraction.

Findings

First observation of B+ -> chi_c0 K+ decay

Branching fraction measured as (6.0^{+2.1}_{-1.8}±1.1) x 10^{-4}

Data collected from 31.3 million B B̄ pairs

Abstract

Using a sample of $31.3 x 10^6 $B\bar{B}$ pairs collected with the Belle detector at the Y(4S) resonance, we make the first observation of the charged B meson decay to chi_c0 and a charged kaon. The measured branching fraction is Br(B+ -> chi_c0 K+)=(6.0^{+2.1}_{-1.8}\pm1.1)x10^{-4}, where the first error is statistical, and the second is systematic.