Observation of Λ0b → D+pπ−π− and Λ0b → D*+pπ−π− decays

LHCb Collaboration

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Abstract

The multihadron decays Λ0b → D+pπ−π− and Λ0b → D*+pπ−π− are observed in data corresponding to an integrated luminosity of 3 fb−1, collected in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV by the LHCb detector. Using the decay Λ0b → Λ+cπ+π−π− as a normalisation channel, the ratio of branching fractions is measured to be

B(Λ0b→D+pπ−π−)B(Λ0b→Λ0cπ+π−π−)×B(D+→K−π+π+)B(Λ0c→pK−π−)=(5.35±0.21±0.16)%,
where the first uncertainty is statistical and the second systematic. The ratio of branching fractions for the Λ0b → D*+pπ−π− and Λ0b → D+pπ−π− decays is found to be

B(Λ0b→D∗+pπ−π−)B(Λ0b→D+pπ−π−)×(B(D∗+→D+π0)+B(D∗+→D+γ))=(61.3±4.3±4.0)%.
Original languageEnglish
Article number153
Number of pages30
JournalJ. High Energ. Phys.
Volume2022
DOIs
Publication statusPublished - 23 Mar 2022

Bibliographical note

All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2021-040.html

Keywords

  • hep-ex
  • B Physics
  • Branching fraction
  • Flavour Physics
  • Hadron-Hadron scattering

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