Search for the Λ<sub>b</sub><SUP>0</SUP> → Λη′ and Λ<sub>b</sub><SUP>0</SUP> → Λη decays with the LHCb detector



Aaij, R, Adeva, B, Adinolfi, M, Affolder, A, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Ali, S
et al (show 710 more authors) (2015) Search for the Λ<sub>b</sub><SUP>0</SUP> → Λη′ and Λ<sub>b</sub><SUP>0</SUP> → Λη decays with the LHCb detector. JOURNAL OF HIGH ENERGY PHYSICS, 09 (9). 006-.

[thumbnail of 1505.03295v2.pdf] Text
1505.03295v2.pdf - Published version

Download (701kB)

Abstract

A search is performed for the as yet unobserved baryonic $\Lambda_b \rightarrow \Lambda \eta^\prime$ and $\Lambda_b \rightarrow \Lambda \eta$ decays with 3$fb^{-1}$ of proton-proton collision data recorded by the LHCb experiment. The $B^0 \rightarrow K_S^0 \eta^\prime$ decay is used as a normalisation channel. No significant signal is observed for the $\Lambda_b \rightarrow \Lambda \eta^\prime$ decay. An upper limit is found on the branching fraction of $\mathcal{B}(\Lambda_b \rightarrow \Lambda \eta^\prime)<3.1\times10^{-6}$} at 90\% confidence level. Evidence is seen for the presence of the $\Lambda_b \rightarrow \Lambda \eta$ decay at the level of $3\sigma$ significance, with a branching fraction $\mathcal{B}(\Lambda_b \rightarrow \Lambda \eta)=(9.3^{+7.3}_{-5.3})\times10^{-6}$}.

Item Type: Article
Additional Information: 22 pages, 6 figures. v2 is published version (very minor revisions)
Uncontrolled Keywords: Hadron-Hadron Scattering, B physics, Flavor physics
Depositing User: Symplectic Admin
Date Deposited: 08 Jul 2016 09:13
Last Modified: 05 Oct 2023 11:01
DOI: 10.1007/JHEP09(2015)006
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3002188