Chiral Structure of Scalar and Pseudoscalar Mesons
Figure 7
Masses of light scalar mesons , , and () as functions of the Borel mass and the threshold value , where only the connected parts, (44), are taken into account. The threshold value for the left figure is chosen to be , , and , while the Borel mass for the right figure is chosen to be 0.5 GeV, 0.6 GeV, and 1.5 GeV, for , , and (), respectively.
