Measurement of the branching fractions of the decays Bs -> D0bar K- {\pi}+ and B0 -> D0bar K+ {\pi}-

TL;DR

This paper reports the first observation of the decay Bs -> D0bar K- π+ and measures its branching fraction relative to a similar decay, using data from the LHCb detector, providing new insights into B meson decay processes.

Contribution

It presents the first measurement of the branching fraction of Bs -> D0bar K- π+ and compares it to B0 decays, expanding understanding of B meson decay channels.

Findings

First observation of Bs -> D0bar K- π+ decay.

Measured branching fraction ratio BR(Bs -> D0bar K- π+)/BR(B0 -> D0bar π+ π-) = 1.18 ± 0.05 (stat.) ± 0.12 (syst.).

Measured BR(B0 -> D0bar K+ π-)/BR(B0 -> D0bar π+ π-) = 0.106 ± 0.007 (stat.) ± 0.008 (syst).

Abstract

The first observation of the decay Bs -> D0bar K- {\pi}+ is reported. The analysis is based on a data sample, corresponding to an integrated luminosity of 1.0 fb-1 of pp collisions, collected with the LHCb detector. The branching fraction relative to that of the topologically similar decay B0 -> D0bar {\pi}+ {\pi}- is measured to be BR(Bs -> D0bar K- {\pi}+)/BR(B0 -> D0bar {\pi}+ {\pi}-) = 1.18 +- 0.05 (stat.) +- 0.12 (syst.). In addition, the relative branching fraction of the decay B0 -> D0bar K+ {\pi}- is measured to be BR(B0 -> D0bar K+ {\pi}-)/BR(B0 -> D0bar {\pi}+ {\pi}-) = 0.106 +- 0.007 (stat.) +- 0.008 (syst.).