%0 Journal Article
%T Evidence for the decay X(3872) -> psi(2S)gamma
%A LHCb Collaboration (Aaij, R. et al
%A Martinez-Vidal, F.
%A Oyanguren, A.
%A Ruiz Valls, P.
%A Sanchez Mayordomo, C.
%J Nuclear Physics B
%D 2014
%V 886
%I Elsevier Science Bv
%@ 0550-3213
%G English
%F LHCbCollaborationAaij_etal2014
%O WOS:000341344500024
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1918), last updated on Tue, 07 Oct 2014 14:28:40 +0000
%X Evidence for the decay mode X(3872) -> psi(2S)gamma in B+ -> X(3872)K+ decays is found with a significance of 4.4 standard deviations. The analysis is based on a data sample of proton proton collisions, corresponding to an integrated luminosity of 3 fb(-1), collected with the LHCb detector, at centre-of-mass energies of 7 and 8 TeV. The ratio of the branching fraction of the X(3872) -> psi(2S)gamma decay to that of the X(3872) -> J/psi gamma decay is measured to be B(X(3872) -> psi(2S)gamma)/B(X(3872) -> J/psi gamma) = 2.46 +/- 0.64 +/- 0.29, where the first uncertainty is statistical and the second is systematic. The measured value does not support a pure D (D) over bar* molecular interpretation of the X(3872) state.
%R 10.1016/j.nuclphysb.2014.06.011
%U http://arxiv.org/abs/1404.0275
%U https://doi.org/10.1016/j.nuclphysb.2014.06.011
%P 665-680