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

Hee-Jung Lee; N. I. Kochelev; Yongseok Oh

doi:10.1103/PhysRevD.87.117901

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

High Energy Physics - Phenomenology 2013-06-12 v2 Nuclear Theory

Authors: Hee-Jung Lee , N. I. Kochelev , Yongseok Oh

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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.

Keywords

QCD sum rule scalar meson bound state operator product expansion meson structure

Cite

@article{arxiv.1303.0610,
  title  = {QCD sum rule study on the $f_0(980)$ structure as a pure $K \bar{K}$ bound state},
  author = {Hee-Jung Lee and N. I. Kochelev and Yongseok Oh},
  journal= {arXiv preprint arXiv:1303.0610},
  year   = {2013}
}

Comments

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

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

Abstract

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