QCD sum rule approach for the light scalar mesons as four-quark states

2004/11/17 by Thiago V. Brito, Fernando S. Navarra, Marina Nielsen +1 · 1 citation
Physics and Astronomy · #hep-ph #nucl-th

paper · pdf · doi:10.1016/j.physletb.2005.01.008

published as Phys.Lett.B608:69-76,2005 · 6 pages, 4 figures

arxiv created 2004/11/17 · arxiv updated 2009/12/01

Abstract

We study the two point-function for the scalar mesons σ, κ, f₀(980) and a₀(980) as diquak-antidiquark states. We also study the decays of these mesons into ππ, Kπ and KK. We found that the couplings are consistent with existing experimental data, pointing in favor of the four-quark structure for the light scalar mesons.

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