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Studies of beauty baryon decays to $D^0 p h^-$ and $\Lambda_c^+ h^-$ final states

Abstract : Decays of beauty baryons to the $D^0 p h^-$ and $\Lambda_c^+ h^-$ final states (where $h$ indicates a pion or a kaon) are studied using a data sample of $pp$ collisions, corresponding to an integrated luminosity of 1.0 fb$^{-1}$, collected by the LHCb detector. The Cabibbo-suppressed decays $\Lambda_b^0\to D^0 p K^-$ and $\Lambda_b^0\to \Lambda_c^+ K^-$ are observed and their branching fractions are measured with respect to the decays $\Lambda_b^0\to D^0 p \pi^-$ and $\Lambda_b^0\to \Lambda_c^+ \pi^-$. In addition, the first observation is reported of the decay of the neutral beauty-strange baryon $\Xi_b^0$ to the $D^0 p K^-$ final state, and a measurement of the $\Xi_b^0$ mass is performed. Evidence of the $\Xi_b^0\to \Lambda_c^+ K^-$ decay is also reported.
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Submitted on : Wednesday, November 20, 2013 - 11:59:44 AM
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R. Aaij, Y. Amhis, S. Barsuk, O. Callot, J. He, et al.. Studies of beauty baryon decays to $D^0 p h^-$ and $\Lambda_c^+ h^-$ final states. Physical Review D, American Physical Society, 2014, 89, pp.032001. ⟨10.1103/PhysRevD.89.032001⟩. ⟨in2p3-00906746⟩



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