2005/11/30 by Sadataka Furui, Hideo Nakajima
Physics and Astronomy · #Mathematical physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics of Superconductivity and Magnetism #Propagator #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quark #Renormalization #hep-lat
paper · pdf · doi:10.1103/physrevd.73.074503
8 pages 10 figures, typos corrected, to be published in Phys. Rev.D(2006)
arxiv created 2006/04/11 · openalex publication_date 2006/04/13 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Quark propagators of the unquenched Kogut-Susskind (KS) fermion obtained from the gauge configurations of the MILC Collaboration are measured after Landau gauge fixing and using the Staple+Naik action. Presence of the qq condensates and A2 condensates in the dynamical mass M(q) and the quark wave function renormalization Z_\ensuremathψ(q2) are investigated. We obtain the correlation of the renormalization factor of the running coupling taken at \ensuremathμ\ensuremath∼6 GeV and that of the quark wave function renormalization Z_\ensuremathψ(q2) of the Staple+Naik action. The mass function M(q) is finite at q=0 and its chiral limit is \ensuremath∼0.38 GeV. We compared the results corrected by the scale of the vertex renormalization and the tadpole renormalization with the corresponding values obtained by the Asqtad action without renormalization and observed good agreement. Implication of infrared finite Z2(q)=1/Z_\ensuremathψ(q2) to the Kugo-Ojima confinement criterion is discussed.