Improved Staggered Quarks, Index Theorem and Random Matrix Theory.

por Eduardo Follana Adin (University of Glasgow)

jueves 13 ene. 2005 16:00 → 17:00 Europe/Madrid

Sala Seminarios IFIC (Edf. Institutos de Investigación)

"We study the low lying spectrum of various improved staggered quark Dirac operators on quenched gluon backgrounds in lattice QCD. We find a clear separation between high-chirality, would-be zero modes, and others. The number of would-be zero modes depends on the topological charge as expected from the Index Theorem. The remaining modes have low chirality, show clear signs of clustering into quartets, and agree with the random matrix theory predictions for each topological sector."