TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Ruiz Valls, P.
AU  - Sanchez Mayordomo, C.
PY  - 2014
DA  - 2014//
TI  - Evidence for the decay X(3872) -> psi(2S)gamma
T2  - Nucl. Phys. B
JO  - Nuclear Physics B
SP  - 665
EP  - 680
VL  - 886
PB  - Elsevier Science Bv
AB  - 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.
SN  - 0550-3213
UR  - http://arxiv.org/abs/1404.0275
UR  - https://doi.org/10.1016/j.nuclphysb.2014.06.011
DO  - 10.1016/j.nuclphysb.2014.06.011
LA  - English
N1  - WOS:000341344500024
ID  - LHCbCollaborationAaij_etal2014
ER  -