f0(980) meson as a K bar K molecule in a phenomenological Lagrangian approach

Abstract

We discuss a possible interpretation of the f0(980) meson as a hadronic molecule - a bound state of K and bar K mesons. Using a phenomenological Lagrangian approach we calculate the strong f0(980) to pi pi and electromagnetic f0(980) to gamma gamma decays. The compositeness condition provides a self-consistent method to determine the coupling constant between f0 and its constituents, K and bar K. Form factors governing the decays of the f0(980) are calculated by evaluating the kaon loop integrals. The predicted f0(980) to pi pi and f0(980) to gamma gamma decay widths are in good agreement with available data and results of other theoretical approaches.

21 pages, 11 figures, revised version accepted for publication in Eur. Phys. J. A

References in corpus (8)

• Strong and radiative decays of the Ds0*(2317) meson in the DK-molecule picture
• D* K molecular structure of the Ds1(2460) meson
• On the spectral functions of scalar mesons
• Ds0*(2317) and Ds1(2460) mesons in two-body B-meson decays
• Amplitude Analysis of High Statistics Results on $\gamma \gamma \to {\pi }^{+}{\pi }^{-}$ and the Two Photon Width of Isoscalar States
• On the two-photon decay width of the sigma meson
• The Riddle of the f0(980) and a0(980): Are They the Quark-Antiquark States?
• Two or Four: A Hint from Scalar Mesons in Radiative phi Decays ?

Cited by in corpus (1)

• Hadronic Molecules and the f0(980)/a0(980)