PT Journal
AU Aceti, F
   Molina, R
   Oset, E
TI X(3872) -> J/psi gamma decay in the D(D)over-bar* molecular picture
SO Physical Review D
JI Phys. Rev. D
PY 2012
BP 113007
EP 13pp
VL 86
IS 11
DI 10.1103/PhysRevD.86.113007
LA English
AB From a picture of the X(3872) where the resonance is a bound state of D (D) over bar*- c.c., we evaluate the decay width into the J/psi gamma channel, which is sensitive to the internal structure of this state. For this purpose we evaluate the loops through which the X(3872) decays into its components, and the J/psi and the photon are radiated from these components. We use the local hidden gauge approach extrapolated to SU(4) with a particular SU(4) breaking. The radiative decay involves anomalous couplings, and we obtain acceptable values which are compared to experiments and results of other calculations. Simultaneously, we evaluate the decay rate for the X(3872) into J/psi omega and J/psi rho, and the results obtained for the ratio of these decay widths are compatible with the experiment. We also show that considering only the (D) over bar D-0*(0) – c.c. component in the radiative decay reduces the partial decay width in more than three orders of magnitude, in large discrepancy with experiment.
ER