PT Journal
AU Debastiani, VR
   Liang, WH
   Xie, JJ
   Oset, E
TI Predictions for eta(c) -> eta pi(+)pi(-) producing f(0)(500), f(0)(980) and a(0)(980)
SO Physics Letters B
JI Phys. Lett. B
PY 2017
BP 59
EP 64
VL 766
DI 10.1016/j.physletb.2016.12.054
LA English
DE Charmonium decays; Scalar meson states; Dynamically generated resonances
AB We perform calculations for the eta(c) -> eta pi(+)pi(-) decay using elements of SU(3) symmetry to see the weight of different trios of pseudoscalars produced in this decay, prior to the final state interaction of the mesons. After that, the interaction of pairs of mesons, leading finally to eta pi(+)pi(-), is done using the chiral unitary approach. We evaluate the pi(+)pi(-) and pi eta mass distributions and find large and clear signals for f(0)(500), f(0)(980) and a(0)(980) excitation. The reaction is similar to the chi(c1) -> eta pi(+)pi(-), which has been recently measured at BESIII and its implementation and comparison with these predictions will be very valuable to shed light on the nature of the low mass scalar mesons.
ER