%0 Journal Article
%T Observation of the B+ → Jψη'K+ decay
%A LHCb Collaboration (Aaij, R. et al
%A Jaimes Elles, S. J.
%A Jashal, B. K.
%A Martinez-Vidal, F.
%A Oyanguren, A.
%A Rebollo De Miguel, M.
%A Remon Alepuz, C.
%A Ruiz Vidal, J.
%A Sanderswood, I.
%A Zhuo, J.
%J Journal of High Energy Physics
%D 2023
%V 08
%N 8
%I Springer
%@ 1029-8479
%G English
%F LHCbCollaborationAaij_etal2023
%O WOS:001188365600001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=6025), last updated on Wed, 10 Apr 2024 12:46:09 +0000
%X The B+ -> J psi eta'K+ decay is observed for the first time using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8, and 13TeV, corresponding to a total integrated luminosity of 9 fb(-1). The branching fraction of this decay is measured relative to the known branching fraction of the B+ -> psi(2S)K+ decay and found to be B(B+ -> J psi eta'K+)/B(B+ -> psi(2S)K+) = (4.91 +/- 0.47 +/- 0.29 +/- 0.07) x 10(-2), where the first uncertainty is statistical, the second is systematic and the third is related to external branching fractions. A first look at the J/psi eta' mass distribution is performed and no signal of intermediate resonances is observed.
%K B Physics
%K Branching fraction
%K Charm Physics
%K Hadron-Hadron Scattering
%R 10.1007/JHEP08(2023)174
%U https://arxiv.org/abs/2303.09443
%U https://doi.org/10.1007/JHEP08(2023)174
%P 174-27pp