The first observation of the decay B0s→Dbar0K−π+ 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→Dbar0π+π− is measured to be ℬ(B0s→Dbar0K−π+)/ℬ(B0→Dbar0π+π−)=1.18±0.05(stat)±0.12(syst). In addition, the relative branching fraction of the decay B0→Dbar0K+π− is measured to be ℬ(B0→Dbar0K+π−)/ℬ(B0→Dbar0π+π−)=0.106±0.007(stat)±0.008(syst).

Measurement of the branching fractions of the decays B-s(0) -> (D)over-bar(0)K(-) pi(+) and B-0 -> (D)over-bar(0)K(+) pi(-)

CARDINALE, ROBERTA;FONTANELLI, FLAVIO;PATRIGNANI, CLAUDIA;PETROLINI, ALESSANDRO;SANNINO, MARIO;
2013-01-01

Abstract

The first observation of the decay B0s→Dbar0K−π+ 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→Dbar0π+π− is measured to be ℬ(B0s→Dbar0K−π+)/ℬ(B0→Dbar0π+π−)=1.18±0.05(stat)±0.12(syst). In addition, the relative branching fraction of the decay B0→Dbar0K+π− is measured to be ℬ(B0→Dbar0K+π−)/ℬ(B0→Dbar0π+π−)=0.106±0.007(stat)±0.008(syst).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/696052
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