QCD sum rule study on the $f_0(980)$ structure as a pure $K\bar{K}$ bound state

Abstract

We perform a QCD sum rule analysis for the scalar $f_0(980)$ meson to investigate whether it can be described as a pure bound state of $K$ and $\bar{K}$ mesons. Based on the QCD sum rule with the operators of up to dimension 10 within the operator product expansion, we found that it is hard to treat the $f_0(980)$ as a simple $K\bar{K}$ bound state, which implies that the $f_0(980)$ scalar meson has more complicated structure being mixed states of various configurations.

REVTeX, 4 pages, 3 figures, revised version to appear in Phys. Rev. D

References in corpus (6)

• Scalar Mesons a0(1450) and sigma(600) from Lattice QCD
• Charm couplings and form factors in QCD sum rules
• Exotic Tetraquark ud bar[s] bar[s] of J^P=0^+ in the QCD Sum Rule
• f0(980) meson as a K bar K molecule in a phenomenological Lagrangian approach
• QCD Sum Rule Study of the Masses of Light Tetraquark Scalar Mesons
• On nature of the scalar-isoscalar mesons in the uniformizing-variable method based on analyticity and unitarity

Cited by in corpus (5)

• Analysis of the scalar nonet mesons with the QCD sum rules
• Four-quark structure of the excited states of heavy mesons
• Abelian Decomposition and Glueball-Quarkonium Mixing in QCD
• Photoproduction of $f_0(980)$ and $f_0(1500)$ resonances off a proton target
• $\tau$ lepton decays with production of strange scalar mesons $K_0^{\ast }(700)$ and $K_0^{\ast }(1430)$ in the extended NJL model