6533b85dfe1ef96bd12bde62
RESEARCH PRODUCT
Screened potential and quarkonia properties at high temperatures
Javier VijandeJavier VijandeA. ValcarceGastão Kreinsubject
PhysicsNuclear and High Energy PhysicsParticle physicsNuclear TheoryInfrared fixed pointScatteringHigh Energy Physics::LatticeHigh Energy Physics::PhenomenologyQuark modelFísicaFOS: Physical sciencesLattice QCDCritical valueGluonNuclear Theory (nucl-th)High Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)Critical point (thermodynamics)Nuclear ExperimentPhenomenology (particle physics)description
We perform a quark model calculation of the quarkonia b (b) over bar and c (c) over bar spectra using smooth and sudden string breaking potentials. The screening parameter is scale dependent and can be related to an effective running gluon mass that has a finite infrared fixed point. A temperature dependence for the screening mass is motivated by lattice QCD simulations at finite temperature. Qualitatively different results are obtained for quarkonia properties close to a critical value of the deconfining temperature when a smooth or a sudden string breaking potential is used. In particular, with a sudden string breaking potential quarkonia radii remain almost independent of the temperature up to the critical point, only well above the critical point the radii increase significantly. Such a behavior will impact the phenomenology of quarkonia interactions in medium, in particular for scattering dissociation processes.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-03-15 | The European Physical Journal A |