PT Journal
AU Roca, L
   Oset, E
TI Scalar resonances in the D+ -> K-K+K+ decay
SO Physical Review D
JI Phys. Rev. D
PY 2021
BP 034020
EP 9pp
VL 103
IS 3
DI 10.1103/PhysRevD.103.034020
LA English
AB We study theoretically the resonant structure of the double Cabibbo suppressed D+ -> K-K+K+ decay. We start from an elementary production diagram, considered subleading in previous approaches, which cannot produce a final K-K+ pair at the tree level but which we show to be able to provide the strength of the decay through final meson-meson state interaction. The different meson-meson elementary productions are related through SU(3), and the final rescattering is implemented from a suitable implementation of unitary extensions of chiral perturbation theory, which generate dynamically the scalar resonances1 f(0)(980) and a(0)(980). We obtain a good agreement with recent experimental data from the LHCb Collaboration with a minimal freedom in the fit and show the dominance of the a(0)(980) contribution close to the threshold of the K-K+ spectrum.
ER