Are Topological Charge Fluctuations in QCD Instanton Dominated?.

Are Topological Charge Fluctuations in QCD Instanton Dominated?.
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ISBN-10 : OCLC:727326833
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Download or read book Are Topological Charge Fluctuations in QCD Instanton Dominated?. written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We consider a recent proposal by Horvath et al. to address the question whether topological charge fluctuations in QCD are instanton dominated via the response of fermions using lattice fermions with exact chiral symmetry, the overlap fermions. Considering several volumes and lattice spacings we find strong evidence for chirality of a finite density of low-lying eigenvectors of the overlap-Dirac operator in the regions where these modes are peaked. This result suggests instanton dominance of topological charge fluctuations in quenched QCD.


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