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Journal Article

Study of charmonium and charmonium-like contributions in B+ -> J/psi eta K+ decays


Schmelling,  M.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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The LHCb Collaboration, Aaij, R., Abdelmotteleb, A. S. W., Abellan Beteta, C., Abudinen, F., Ackernley, T., et al. (2022). Study of charmonium and charmonium-like contributions in B+ -> J/psi eta K+ decays. Journal of high energy physics: JHEP, 2022(4): 046. doi:10.1007/JHEP04(2022)046.

Cite as: https://hdl.handle.net/21.11116/0000-000A-E3B2-C
A study of B+ -> J/psi eta K+ decays, followed by J/psi -> mu(+)mu(-) and eta -> gamma gamma, is performed using a dataset collected with the LHCb detector in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb(-1). The J/psi eta mass spectrum is investigated for contributions from charmonia and charmonium-like states. Evidence is found for the B+ -> (psi(2)(3823) -> J/psi eta)K+ and B+ -> (psi(4040) -> J/psi eta)K+ decays with significance of 3.4 and 4.7 standard deviations, respectively. This constitutes the first evidence for the psi(2)(3823) -> J/psi eta decay.