The a0(980) and f0(980) in the process Ds+ → K+K-π+

In this work, we have investigated the process D-s(+) -> K+ K-pi(+), taking into account the contributions from the S-wave pseudoscalar-pseudoscalar interaction within the chiral unitary approach, and also the intermediate phi resonance. By analyzing the BESIII and BABAR measurements, we conclude that the f(0)(980) state, dynamically generated from the S-wave pseudoscalar-pseudoscalar interaction, gives the dominant contribution close to the K+ K- threshold in the K+ K- invariant mass distribution of the decay D-s(+) -> K+ K- pi(+) in S-wave. On the other hand, our results imply that the lineshape adopted by BESIII and BABAR for the resonances a(0)(980) and f(0)(980) is not advisable in the fit to the data close to the K+ K- threshold. (C) 2021 The Author(s). Published by Elsevier B.V.

Automated summary

In this study, the process D-s(+) -> K+ K-pi(+) was investigated, considering the contributions from the S-wave pseudoscalar-pseudoscalar interaction within the chiral unitary approach and the intermediate phi resonance. The dynamically generated f(0)(980) state was found to give the dominant contribution near the K+ K- threshold in the invariant mass distribution of the decay. Our results suggest that the lineshape adopted for the resonances a(0)(980) and f(0)(980) by BESIII and BABAR may not be suitable for fitting data close to the K+ K- threshold.