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Observations of Λb0 → ΛK+π- and Λb0 → ΛK+K- decays and searches for other Λb0 and Ξb0 decays to Λh+h′− final states

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Aquines Gutierrez,  O.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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Blouw,  Johan
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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Britsch,  Markward
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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Fontana,  Marianna
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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Popov,  Dmitry
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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Schmelling,  Michael
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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Zavertyaev,  Mikhail
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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1603.00413.pdf
(Preprint), 587KB

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Citation

LHCb Collaboration, Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Ajaltouni, Z., et al. (2016). Observations of Λb0 → ΛK+π- and Λb0 → ΛK+K- decays and searches for other Λb0 and Ξb0 decays to Λh+h′− final states. Journal of high energy physics: JHEP, 2016(05): 081. doi:10.1007/JHEP05(2016)081.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002B-2198-1
Abstract
A search is performed for the charmless three-body decays of the
$\Lambda_b^0$ and $\Xi_b^0$ baryons to the final states $\Lambda h^+h^{\prime
-}$, where $h^{(\prime)} = \pi$ or $K$. The analysis is based on a data sample,
corresponding to an integrated luminosity of $3 \rm fb^{-1}$ of $pp$
collisions, collected by the LHCb experiment. The $\Lambda_b^0 \to \Lambda
K^+\pi^-$ and $\Lambda_b^0 \to \Lambda K^+K^-$ decays are observed for the
first time and their branching fractions and $CP$ asymmetry parameters are
measured. Evidence is seen for the $\Lambda_b^0 \to \Lambda \pi^+\pi^-$ decay
and limits are set on the branching fractions of $\Xi_b^0$ baryon decays to the
$\Lambda h^+h^{\prime -}$ final states.