Speaker
Dr
Gurjav Ganbold
(JINR, Dubna)
Description
The behavior of QCD effective coupling is studied in the low-energy region
within a relativistic quantum-field model based on analytical confinement.
The spectra of two-quark and two-gluon bound states are defined by using
the Bethe-Salpeter equation and compared with conventional meson masses.
A new, independent and specific infrared-finite behavior of QCD coupling
is revealed below energy scale $\sim1$~GeV. Particularly, an infrared-fixed
point is extracted at $\alpha_s(0)/\pi \simeq 0.241$. We provide a new analytic
estimate of the lowest-state glueball mass and, as an application, calculate
masses of some intermediate and heavy mesons. The model may serve
a reasonable framework to describe simultaneously different sectors in
low-energy particle physics.
Primary author
Dr
Gurjav Ganbold
(JINR, Dubna)
