Bound-State Approach to the QCD Coupling Constant at Low-Energy Scales

M. Baldicchi, A. V. Nesterenko, G. M. Prosperi, D. V. Shirkov, and C. Simolo
Phys. Rev. Lett. 99, 242001 – Published 12 December 2007

Abstract

We exploit theoretical results on the meson spectrum within the framework of a Bethe-Salpeter (BS) formalism adjusted for QCD, in order to extract an experimental coupling αsexp(Q2) below 1 GeV by comparison with the data. Our results for αsexp(Q2) exhibit a good agreement with the infrared safe analytic perturbation theory (APT) coupling from 1 GeV down to 200 MeV. As a main result, we claim that the combined BS-APT theoretical scheme provides us with a rather satisfactory correlated understanding of very high- and low-energy phenomena.

  • Figure
  • Figure
  • Received 11 May 2007

DOI:https://doi.org/10.1103/PhysRevLett.99.242001

©2007 American Physical Society

Authors & Affiliations

M. Baldicchi1, A. V. Nesterenko2, G. M. Prosperi1, D. V. Shirkov2, and C. Simolo1

  • 1Dipartimento di Fisica, Università di Milano and INFN, Sezione di Milano, Via Celoria 16, 20133 Milano, Italy
  • 2Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, 141980, Russia

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 99, Iss. 24 — 14 December 2007

Reuse & Permissions
Access Options

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×