RT Journal Article
T1 Evidence for the decay X(3872) →ψ(2S)γ
A1 LHCb Collaboration, 
A1 Adeva Andany, Bernardo
A1 Álvarez Cartelle, Paula
A1 Dosil Suárez, Álvaro
A1 Fernández Albor, Víctor Manuel
A1 Gallas Torreira, Abraham Antonio
A1 Hernando Morata, José Ángel
A1 Pazos Álvarez, Antonio
A1 Pérez Trigo, Eliseo
A1 Plo Casasus, Máximo
A1 Rodríguez Pérez, Pablo
A1 Romero Vidal, Antonio
A1 Saborido Silva, Juan José
A1 Santamarina Ríos, Cibrán
A1 Seco Miguélez, Marcos Antonio
A1 Vázquez Regueiro, Pablo
A1 Vázquez Sierra, Carlos
AB Evidence for the decay mode X(3872) →ψ(2S)γin B+→X(3872)K+decays is found with a sig-nificance of 4.4 standard deviations. The analysis is based on adata sample of proton–proton collisions, corresponding to an integrated luminosity of3fb−1, collected with the LHCb detector, at centre-of-mass energies of 7and8TeV. The ratio of the branching fraction of the X(3872) →ψ(2S)γdecay to that of the X(3872) →J/ψγdecay is measured to beB(X(3872)→ψ(2S)γ)B(X(3872)→J/ψγ)= 2.46± 0.64±0.29,where the first uncertainty is statistical and the second is systematic. The measured value does not support apureD¯D∗molecular interpretation of the X(3872)state.
PB Elsevier
SN 0550-3213
YR 2014
FD 2014
LK http://hdl.handle.net/10347/21717
UL http://hdl.handle.net/10347/21717
LA eng
NO Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Albrecht, J., ... & Cartelle, P. A. (2014). Evidence for the decay X (3872)→ ψ (2S) γ. Nuclear Physics B, 886, 665-680
DS Minerva
RD 4 may 2026