The large-Nc masses of light scalar mesons from QCD sum rules for linear radial spectrum
S. S. Afonin, T. D. Solomko
TL;DR
This paper calculates the masses of light scalar mesons in the large-Nc limit using QCD sum rules and linear radial trajectories, highlighting a pole near 0.5 GeV likely representing the sigma-meson.
Contribution
It introduces two methods based on linear radial Regge trajectories to determine large-Nc scalar meson masses from QCD sum rules, emphasizing the sigma-meson pole.
Findings
Identification of a pole near 0.5 GeV in the scalar isoscalar channel
Validation of two methods for mass calculation using linear trajectories
Support for the sigma-meson as a scalar resonance in the model
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.
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Taxonomy
TopicsQuantum Chromodynamics and Particle Interactions · Particle physics theoretical and experimental studies · High-Energy Particle Collisions Research