Observations of Λb 0 → ΛK+π and Λb 0 → ΛK+ K decays and searches for other Λb 0 and Ξb 0 decays to Λh+ h′ final states

The Lhcb Collaboration

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

A search is performed for the charmless three-body decays of the Λb 0 and Ξb 0 baryons to the final states Λh+h′, where h() = π or K. The analysis is based on a data sample, corresponding to an integrated luminosity of 3 fb−1 of pp collisions, collected by the LHCb experiment. The Λb 0 → ΛK+π and Λb 0 → ΛK+K decays are observed for the first time and their branching fractions and CP asymmetry parameters are measured. Evidence is seen for the Λb 0 → Λπ+π decay and limits are set on the branching fractions of Ξb 0 baryon decays to the Λh+h′ final states.

Original languageEnglish (US)
Article number81
JournalJournal of High Energy Physics
Volume2016
Issue number5
DOIs
StatePublished - May 1 2016

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decay
baryons
luminosity
asymmetry
collisions

Keywords

  • Branching fraction
  • CP violation
  • Flavor physics
  • Hadron-Hadron scattering (experiments)
  • Rare decay

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Observations of Λb 0 → ΛK+π and Λb 0 → ΛK+ K decays and searches for other Λb 0 and Ξb 0 decays to Λh+ h′ final states. / The Lhcb Collaboration.

In: Journal of High Energy Physics, Vol. 2016, No. 5, 81, 01.05.2016.

Research output: Contribution to journalArticle

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abstract = "A search is performed for the charmless three-body decays of the Λb 0 and Ξb 0 baryons to the final states Λh+h′−, where h(′) = π or K. The analysis is based on a data sample, corresponding to an integrated luminosity of 3 fb−1 of pp collisions, collected by the LHCb experiment. The Λb 0 → ΛK+π− and Λb 0 → ΛK+K− decays are observed for the first time and their branching fractions and CP asymmetry parameters are measured. Evidence is seen for the Λb 0 → Λπ+π− decay and limits are set on the branching fractions of Ξb 0 baryon decays to the Λh+h′− final states.",
keywords = "Branching fraction, CP violation, Flavor physics, Hadron-Hadron scattering (experiments), Rare decay",
author = "{The Lhcb Collaboration} and R. Aaij and {Abell{\'a}n Beteta}, C. and B. Adeva and M. Adinolfi and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and M. Alexander and S. Ali and G. Alkhazov and {Alvarez Cartelle}, P. and Alves, {A. A.} and S. Amato and S. Amerio and Y. Amhis and L. An and L. Anderlini and G. Andreassi and M. Andreotti and Andrews, {J. E.} and Appleby, {R. B.} and {Aquines Gutierrez}, O. and F. Archilli and P. d’Argent and A. Artamonov and M. Artuso and Marina Artuso and G. Auriemma and M. Baalouch and S. Bachmann and Back, {J. J.} and A. Badalov and C. Baesso and S. Baker and W. Baldini and Barlow, {R. J.} and C. Barschel and S. Barsuk and W. Barter and V. Batozskaya and V. Battista and A. Bay and L. Beaucourt and J. Beddow and F. Bedeschi and I. Bediaga and Blusk, {Steven Roy} and Tomasz Skwarnicki and Sheldon Stone",
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AU - Aaij, R.

AU - Abellán Beteta, C.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Ajaltouni, Z.

AU - Akar, S.

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AU - Andreotti, M.

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AU - Archilli, F.

AU - d’Argent, P.

AU - Artamonov, A.

AU - Artuso, M.

AU - Artuso, Marina

AU - Auriemma, G.

AU - Baalouch, M.

AU - Bachmann, S.

AU - Back, J. J.

AU - Badalov, A.

AU - Baesso, C.

AU - Baker, S.

AU - Baldini, W.

AU - Barlow, R. J.

AU - Barschel, C.

AU - Barsuk, S.

AU - Barter, W.

AU - Batozskaya, V.

AU - Battista, V.

AU - Bay, A.

AU - Beaucourt, L.

AU - Beddow, J.

AU - Bedeschi, F.

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AU - Skwarnicki, Tomasz

AU - Stone, Sheldon

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AB - A search is performed for the charmless three-body decays of the Λb 0 and Ξb 0 baryons to the final states Λh+h′−, where h(′) = π or K. The analysis is based on a data sample, corresponding to an integrated luminosity of 3 fb−1 of pp collisions, collected by the LHCb experiment. The Λb 0 → ΛK+π− and Λb 0 → ΛK+K− decays are observed for the first time and their branching fractions and CP asymmetry parameters are measured. Evidence is seen for the Λb 0 → Λπ+π− decay and limits are set on the branching fractions of Ξb 0 baryon decays to the Λh+h′− final states.

KW - Branching fraction

KW - CP violation

KW - Flavor physics

KW - Hadron-Hadron scattering (experiments)

KW - Rare decay

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