出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We study various improved staggered quark Dirac operators on quenched gluon backgrounds in
lattice QCD. We nd a clear separation of the spectrum of eigenvalues into high chirality, wouldbe
zero modes and others, in accordance with the Index Theorem. We nd the expected clustering
of the non-zero modes into quartets as we approach the continuum limit. The predictions of
random matrix theory for the epsilon regime are well reproduced. We conclude that improved
staggered quarks near the continuum limit respond correctly to QCD topology.
