6533b862fe1ef96bd12c6f02
RESEARCH PRODUCT
Infrared enhanced analytic coupling and chiral symmetry breaking in QCD
A.v. NesterenkoA.v. NesterenkoArlene Cristina AguilarJoannis Papavassiliousubject
High Energy Physics - TheoryQuarkPhysicsQuantum chromodynamicsNuclear and High Energy PhysicsParticle physicsInfraredHigh Energy Physics::LatticeHigh Energy Physics::PhenomenologyFOS: Physical sciencesFísicaInvariant (physics)Asymptotic freedomHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)High Energy Physics - Theory (hep-th)High Energy Physics::ExperimentPion decay constantChiral symmetry breakingScale parameterdescription
We study the impact on chiral symmetry breaking of a recently developed model for the QCD analytic invariant charge. This charge contains no adjustable parameters, other than the QCD mass scale $\Lambda$, and embodies asymptotic freedom and infrared enhancement into a single expression. Its incorporation into the standard form of the quark gap equation gives rise to solutions for the dynamically generated mass that display a singular confining behaviour at the origin. Using the Pagels-Stokar method we relate the obtained solutions to the pion decay constant $f_{\pi}$, and estimate the scale parameter $\Lambda$, in the presence of four active quarks, to be about 880 MeV.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-04-21 |