The linear radial spectrum of scalar mesons within the QCD sum rules in the planar limit
arXiv:1811.01748 · doi:10.1051/epjconf/201819104004
Abstract
We discuss the radial spectrum of light scalar mesons in the framework of spectral sum rules in the large-Nc (planar) limit of QCD. Two methods based on the use of linear radial Regge trajectories are presented. A special emphasis is placed on the appearance of scalar isoscalar state near 0.5 GeV. Within the considered sum rules, the existence of this meson (which could be a large-Nc counterpart to the sigma-meson) is closely related with existence of resonances in the vector channels and on the radial scalar trajectory.
arXiv comment8 pages, 2 figures, presented at QUARKS-2018. arXiv admin note: substantial text overlap with arXiv:1805.06726
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