The Debye Length and the Running Coupling of QCD: a Potential and Phenomenological Approach

In this paper, one uses a damped potential to present a description of the running coupling constant of QCD in the confinement phase. Based on a phenomenological perspective for the Debye screening length, one compares the running coupling obtained here with both the Brodsky-de T\'eramond-Deur and the Richardson approaches. The results seem to indicate the model introduced here corroborate the Richardson approach. Moreover, the Debye screening mass in the confinement phase depends on a small parameter, which tends to vanish in the non-confinement phase of QCD.
Comment: Minor misprints corrected. Accepted for publication in Int. J. Mod. Phys. A36, 2150084 (2021)