Mass and Decay Constant of $I=1/2$ Scalar Meson In QCD Sum Rule

Details Mass and Decay Constant of $I=1/2$ Scalar Meson In QCD Sum Rule Mass and Decay Constant of $I=1/2$ Scalar Meson In QCD Sum Rule

2004-09-27

arxiv.org/abs/hep-ph/0409302v2

Phys.Lett.B619:105-114,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 5 figures, Latex, some content added

Scientific paper

10.1016/j.physletb.2005.05.043

We calculate the mass and decay constant of $I=1/2$ scalar mesons composed of quark-antiquark pairs based on QCD sum rule. The quauk-antiquark pairs can be $s\bar{q}$ or $q\bar{s}$ ($q=u,d$) in quark model, the quantum numbers of spin and orbital angular momentum are S=1, L=1. We obtain the mass of the ground sate in this channel is $1.410\pm 0.049$GeV. This result favors that $K_{0}^{\ast}(1430)$ is the lowest scalar state of $s\bar{q}$ or $q\bar{s}$. We also predict the first excited scalar resonance of $s\bar{q}$ is larger than 2.0 GeV.

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