Measurement of the B- -> D0 K*- branching fraction

TL;DR

This paper reports a precise measurement of the branching fraction for the decay B- to D0 K*- using data from the BABAR detector, providing valuable input for understanding B meson decays.

Contribution

First measurement of the B- to D0 K*- branching fraction using a large dataset and multiple D0 decay channels at BABAR.

Findings

Branching fraction B(B- to D0 K*-) = (5.29 +/- 0.30(stat) +/- 0.34(syst)) x 10^-4

Used 232 million B B-bar events from PEP-II

Reconstructed K*- in K0_S pi- and D0 in multiple decay modes

Abstract

From a sample of 232 million Upsilon(4S)--> B B-bar events collected with the BABAR detector at the PEP-II B Factory in 1999--2004, we measure the B- --> D0 K*-(892) decay branching fraction using events where the K*- is reconstructed in the K0_S pi- mode and the D0 in the K- pi+, K- pi+ pi0, and K- pi+ pi+ pi- channels: B(B- --> D0 K*-(892)) = 5.29 +/- 0.30(stat) +/- 0.34 (syst)) X 10-4.