Observation of the baryonic decay ${\bar{B}}^0\to {\Lambda }_c^{+}\bar{p}{K}^{-}{K}^{+}$

Abstract

We report the observation of the baryonic decay ${\bar{B}}^0\to {\Lambda }_c^{+}\bar{p}{K}^{-}{K}^{+}$ using a data sample of $471\times 10^6$ $B\bar{B}$ pairs produced in $e^{+}{e}^{-}$ annihilations at $\sqrt{s}=10.58\mathrm{GeV}$. This data sample was recorded with the $BABAR$ detector at the PEP-II storage ring at SLAC. We find $\mathcal{B}\left({\bar{B}}^0\to {\Lambda }_c^{+}\bar{p}{K}^{-}{K}^{+}\right)=\left(2.5\pm 0.4_{(\text{stat})}\pm 0.2_{(\text{syst})}\pm 0.6_{\mathcal{B}\left({\Lambda }_c^{+}\right)}\right)\times 10^{-5}$, where the uncertainties are statistical, systematic, and due to the uncertainty of the ${\Lambda }_c^{+}\to p{K}^{-}{\pi }^{+}$ branching fraction, respectively. The result has a significance corresponding to 5.0 standard deviations, including all uncertainties. For the resonant decay ${\bar{B}}^0\to {\Lambda }_c^{+}\bar{p}\varphi$, we determine the upper limit $\mathcal{B}\left({\bar{B}}^0\to {\Lambda }_c^{+}\bar{p}\varphi \right)<1.2\times 10^{-5}$ at $90\%$ confidence level.

References in corpus (6)

• The BABAR Detector
• Measurement of the Branching Fraction Br(Lambda_c+ -> p K- pi+)
• Low-Mass Baryon-Antibaryon Enhancements in B Decays
• Observation of CP Violation in B0 -> K+pi- and B0 -> pi+pi-
• Partial waves of baryon-antibaryon in three-body B meson decay
• Evidence for the baryonic decay B0bar --> D0 Lambda Lambdabar

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