Observation of the decay Λ<sub>b</sub><SUP>0</SUP> → ψ(2S)pπ<SUP>-</SUP>

Aaij, R, Adeva, B, Adinolfi, M, Aidala, CA, Ajaltouni, Z, Akar, S, Albicocco, P, Albrecht, J, Alessio, F, Alexander, M
et al (show 827 more authors) (2018) Observation of the decay Λ<sub>b</sub><SUP>0</SUP> → ψ(2S)pπ<SUP>-</SUP>. JOURNAL OF HIGH ENERGY PHYSICS, 2018 (8).

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The Cabibbo-suppressed decay Λb0 → ψ(2S)pπ− is observed for the first time using a data sample collected by the LHCb experiment in proton-proton collisions corresponding to 1.0, 2.0 and 1.9 fb−1 of integrated luminosity at centre-of-mass energies of 7, 8 and 13 TeV, respectively. The ψ(2S) mesons are reconstructed in the μ+μ− final state. The branching fraction with respect to that of the Λb0 → ψ(2S)pK− decay mode is measured to be ℬ(Λb0→ψ(2S)pπ−)ℬ(Λb0→ψ(2S)pK−)=(11.4±1.3±0.2)%, where the first uncertainty is statistical and the second is systematic. The ψ(2S)p and ψ(2S)π− mass spectra are investigated and no evidence for exotic resonances is found.[Figure not available: see fulltext.].

Item Type: Article
Uncontrolled Keywords: B physics, Flavor physics, Hadron-Hadron scattering (experiments), Spectroscopy
Depositing User: Symplectic Admin
Date Deposited: 03 Dec 2018 10:30
Last Modified: 13 Oct 2023 07:01
DOI: 10.1007/JHEP08(2018)131
Open Access URL: https://arxiv.org/pdf/1806.08084.pdf
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3029296