A search is performed for the as yet unobserved baryonic Λ b 0 → Λη ′ and Λ b 0 → Λη decays with 3 fb −1 of proton-proton collision data recorded by the LHCb experiment. The B 0 → K s 0η ′ decay is used as a normalisation channel. No significant signal is observed for the Λ b 0 → Λη ′ decay. An upper limit is found on the branching fraction of ℬΛb0→Λη′ < 3.1 × 10 −6 at 90% confidence level. Evidence is seen for the presence of the Λ b 0 → Λη decay at the level of 3σ significance, with a branching fraction (Formula presented.).
All Science Journal Classification (ASJC) codes
- Física nuclear y de alta energía