Identification of a Scalar Glueball
Abstract
We have performed a coupled channel study of the meson-meson S-waves involving isospins (I) 0, 1/2 and 3/2 up to 2 GeV. For the first time the channels \pi\pi, K\bar{K}, \eta\eta, \sigma\sigma, \eta\eta', \eta'\eta', \rho\rho, \omega\omega, \omega\phi$, \phi\phi, a_1\pi and \pi^*\pi are considered. All the resonances with masses below 2 GeV for I=0 and 1/2 are generated by the approach. We identify the f_0(1710) and a pole at 1.6 GeV, which is an important contribution to the f_0(1500), as glueballs. This is based on an accurate agreement of our results with predictions of lattice QCD and the chiral suppression of the coupling of a scalar glueball to \bar{q}q. Another nearby pole, mainly corresponding to the f_0(1370), is a pure octet state not mixed with the glueball.
Keywords
Cite
@article{arxiv.0801.4929,
title = {Identification of a Scalar Glueball},
author = {M. Albaladejo and J. A. Oller},
journal= {arXiv preprint arXiv:0801.4929},
year = {2009}
}
Comments
5 pages, 1 figure. More data are included and reproduced. Some discussions have been rephrased