The large-Nc masses of light scalar mesons from QCD sum rules for linear radial spectrum

Abstract

We discuss a calculation of large-Nc masses of light scalar mesons from the QCD sum rules. Two methods based on the use of linear radial Regge trajectories are presented. We put a special emphasis on the appearance of pole near 0.5 GeV in the scalar isoscalar channel which emerges in both methods and presumably corresponds to the scalar sigma-meson.

Comments: 6 pages, 2 figures, presented at Excited QCD 2018