Evidence of Instanton Effects in Hadrons from the Study of Low Eigenfunctions of the Dirac Operator
Abstract
To elucidate the role in hadron structure of quark zero modes associated with instantons, the lowest eigenfunctions of the Dirac operator have been calculated in quenched QCD, full QCD, and full QCD with cooling. Eigenmodes associated with a single instanton and an instanton-anti-instanton pair were studied to understand the role of lattice artifacts for Wilson Fermions. By truncating the spectral representation of the quark propagator, we show that the rho and pion contributions to the vector and pseudoscalar correlation functions are dominated by the zero-mode contributions.
Keywords
Cite
@article{arxiv.hep-lat/9709130,
title = {Evidence of Instanton Effects in Hadrons from the Study of Low Eigenfunctions of the Dirac Operator},
author = {T. L. Ivanenko and J. W. Negele},
journal= {arXiv preprint arXiv:hep-lat/9709130},
year = {2009}
}
Comments
Email to [email protected]; 3 pages, 2 eps figures; submitted to Lattice'97 (Edinburgh) Proceedings; Correction: uses espcrc2.sty, BoxedEPS macros; Note: only these comments have been revised, text is same as first submission