6533b7dafe1ef96bd126ed93
RESEARCH PRODUCT
Effective models of two-flavor QCD: from small towards large $m_q$
Kimmo TuominenTopi Kaharasubject
Quantum chromodynamicsQuarkPhysicsNuclear and High Energy PhysicsParticle physicsPhase transitionSigma model010308 nuclear & particles physicsHigh Energy Physics::LatticeNuclear TheoryHigh Energy Physics::PhenomenologyFOS: Physical sciences01 natural sciencesHigh Energy Physics - PhenomenologyPionHigh Energy Physics - Phenomenology (hep-ph)Mean field theoryLattice (order)0103 physical sciencesQuark–gluon plasma010306 general physicsdescription
We study effective models of chiral fields and Polyakov loop expected to describe the dynamics responsible for the phase structure of two-flavor QCD. We consider the chiral sector described either using a linear sigma model or a Nambu-Jona-Lasinio model and study how these models, on the mean-field level when coupled with the Polyakov loop, behave as a function of increasing bare quark (or pion) mass. We find qualitatively similar behaviors for the cases of the linear sigma model and the Nambu-Jona-Lasinio model and, by comparing with existing lattice data, show that one cannot conclusively decide which of the two approximate symmetries drives the phase transitions at the physical point.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-06-04 |