Observation of the decays B- to Ds(*)+ K- pi-

TL;DR

This paper reports the first observation of specific B- meson decays to Ds(*)+ K- pi- using data from the BaBar experiment, measuring their branching fractions with statistical and systematic uncertainties.

Contribution

It provides the first experimental evidence for these decay modes and measures their branching fractions, expanding understanding of B meson decay processes.

Findings

First observation of B- to Ds(*)+ K- pi- decays.

Measured branching fractions with uncertainties.

Supports theoretical models of B meson decays.

Abstract

We report first observations of the decays B- to Ds(*)+ K- pi-, using 292 fb^-1 of data collected at Upsilon(4S) resonance energy by the BaBar detector at the PEP II e+ e- collider. The branching fractions are measured to be B(B- to Ds+ K- pi-) = (1.88 +- 0.13 +- 0.41) x 10^-4 and B(B- to Ds*+ K- pi-) = (1.84 +- 0.19 +- 0.40) X 10^-4.