Darmstadt 2008 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 40: Theorie
HK 40.9: Talk
Thursday, March 13, 2008, 18:45–19:00, 2F
Interacting Instanton Liquid Model and transition into the Chiral Regime of QCD — •Marco Cristoforetti1, Pietro Faccioli2, Marco Traini2, and John W. Negele3 — 1Physik Department, Technische Universität München, D-85747 Garching, Germany. — 2Trento University and I.N.F.N. Gruppo Collegato di Trento, Via Sommarive 14 Povo (Trento), 38100 Italy. — 3Center for Theoretical Physics Massachusetts Institute of Technology, NE25-4079, 77 Massachusetts Ave, Cambridge, MA 02139-4307, USA.
The non-perturbative quark-gluon interaction depends significantly on the value of the quark mass. In particular, in the light quark mass regime, correlations are strongly induenced by dynamics associated to chiral symmetry breaking.
We use the Interacting Instanton Liquid Model (IILM) as a tool to investigate the microscopic dynamical mechanisms which underly the dependence on the quark mass and drive the transition into the chiral regime of QCD. In particular we show that light hadrons exist in the instanton vacuum and, for stable states, the dependence on the quark mass in the IILM agrees well with the predictions of chiral perturbation theory and with lattice simulations.