Observation of the Λ0b → Λ+c K + K −π− decay

LHCb collaboration, S. Playfer

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The Λ0b → Λ+c K + K −π− decay is observed for the first time using a data sample of proton-proton collisions at centre-of-mass energies of √s = 7 and 8 TeV collected by the LHCb detector, corresponding to an integrated luminosity of 3fb−1 . The ratio of branching fractions between the Λ0b → Λ+c K + K −π−
and the Λ0b → Λ+c D−s decays is measured to be
B(Λ0b → Λ+c K + K −π−)B(Λ0b → Λ+c D−s ) = (9.26 ± 0.29 ± 0.46 ± 0.26) × 10−2,
where the first uncertainty is statistical, the second systematic and the third is due to the knowledge of the D−s → K + K −π− branching fraction. No structure on the invariant mass distribution of the Λ+c K + system is found, consistent with no open-charm pentaquark signature.
Original languageEnglish
Article number136172
Pages (from-to)1-10
Number of pages10
JournalPhysics Letters B
Early online date23 Feb 2021
Publication statusPublished - 10 Apr 2021


Dive into the research topics of 'Observation of the Λ0b → Λ+c K + K −π− decay'. Together they form a unique fingerprint.

Cite this