Instantons and scalar multiquark states: From small to large N(c)
Sep, 2003Citations per year
Abstract:
We study scalar quark-anti-quark and two-quark-two-anti-quark correlation functions in the instanton liquid model. We show that the instanton liquid supports a light scalar-isoscalar (sigma) meson, and that this state is strongly coupled to both and . The scalar-isovector meson, on the other hand, is heavy. We also show that these properties are specific to QCD with three colors. In the large limit the scalar-isoscalar meson is not light, and it is mainly coupled to .- 11.15.Pg
- 13.75.Lb
- 12.38.Lg
- bound state: (quark antiquark)
- bound state: (2quark 2antiquark)
- multiquark: scalar
- pi pi: correlation function
- instanton: liquid
- f0(600)
- a0(980)
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