Observation of $B^- \to \bar{p} \Lambda D^0$ at Belle

We study B- meson decays to pbar Lambda D(*)0 final states using a sample of 657 * 10^6 B Bbar events collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+ e- collider. The observed branching fraction for B- to pbar Lambda D0 is (1.43^ +0.28_-0.25 +- 0.18)*10^-5. with a significance of 8.1 standard deviations, where the uncertainties are statistical and systematic, respectively. Most of the signal events have the pbarLambda mass peaking near threshold. No significant signal is observed for B- to pbar Lambda D*0 and the corresponding upper limit on the branching fraction is 4.8 * 10^-5 at the 90% confidence level.

Note:

6 pages, 4 figures (6 figure files), submitted to Phys.Rev.D

14.40.Nd
13.25.Hw
13.30.Eg
electron positron: annihilation
B: pair production
B-: hadronic decay
B-: branching ratio: measured
branching ratio: upper limit
BELLE
experimental results

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Figures(6)

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Observation of B−→pˉΛD0B^- \to \bar{p} \Lambda D^0B−→pˉ​ΛD0 at Belle

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Observation of $B^- \to \bar{p} \Lambda D^0$ at Belle