First observation of the decay Bˉ0s→D0K∗0 and a measurement of the ratio of branching fractions B(Bˉ0s→D0K∗0)B(Bˉ0→D0ρ0).

The LHCb Collaboration

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Abstract / Description of output

The first observation of the decay Bˉ0s→D0K∗0 using pp data collected by the LHCb detector at a centre-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 36 pb−1, is reported. A signal of 34.4±6.8 events is obtained and the absence of signal is rejected with a statistical significance of more than nine standard deviations. The Bˉ0s→D0K∗0 branching fraction is measured relative to that of Bˉ0→D0ρ0: B(Bˉ0s→D0K∗0)B(Bˉ0→D0ρ0)=1.48±0.34±0.15±0.12, where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the ratio of the B0 and B0s hadronisation fractions.
Original languageEnglish
JournalPhysics Letters B
DOIs
Publication statusPublished - 15 Nov 2011

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