2023/10/30 by Jia-Xin Lin, Lin, Jia-Xin, Jia-Ting Li +7
Physics and Astronomy · #Quantum Chromodynamics and Particle Interactions #Particle physics theoretical and experimental studies #High-Energy Particle Collisions Research
paper · pdf · doi:10.48550/arxiv.2310.19213
We perform a theoretical study of the J/ψ→ ω(ϕ) K^* K + c.c. → ω(ϕ) K0 π+ K- reactions with the assumption that the f1(1285) is dynamically generated from a single channel K^* K + c.c interaction in the chiral unitary approach. Two peaks in the K0 π+ K- invariant mass distribution are observed, one clear peak locates at the f1(1285) nominal mass, the other peak locates at around 1420 \rm MeV with about 70 \rm MeV width. We conclude that the former peak is associated with the f1(1285) and the latter peak is not a genuine resonance but a manifestation of the kinematic effect in the higher energy region caused by the K^* K + c.c. decay mode of the f1(1285).