PT Journal
AU Aceti, F
   Dias, JM
   Oset, E
TI f(1)(1285) decays into a(0)(980) pi(0), f(0)(980) pi(0) and isospin breaking
SO European Physical Journal A
JI Eur. Phys. J. A
PY 2015
BP 48
EP 8pp
VL 51
IS 4
DI 10.1140/epja/i2015-15048-5
LA English
AB We evaluate the decay width for the processes f1(1285). p 0 a0(980) and f1(1285). p 0 f0(980) taking into account that all three resonances are dynamically generated from the meson- meson interaction, the f1(1285) from K* _ K – c. c. and the a0(980), f0(980) from p., K _ K and pp, K _ K, respectively. We use a triangular mechanism similar to that of.(1405). pp., which provides a decay width for f1(1285). p 0 a0(980) with a branching fraction of the order of 30%, in agreement with experiment. At the same time we evaluate the decay width for the isospin- forbidden f1(1285). p 0 f0(980), which appears when we consider different masses for the charged and neutral kaons, and show that it is much more suppressed than in the.(1405). pp. case, but gives rise to a narrow shape of the p + p- distribution similar to the one found in the eta(1405) -> pi pi eta decay.
ER