Egalitarian Improvement to Democracy: Quark renormalization constants in N_f=2 QCD

Abstract

We present our results on the non-perturbative evaluation of the renormalization constant for the quark field, $Z_q$, in Landau gauge within RI-MOM scheme. Using three lattice spacing we are able to isolate lattice artefacts of various origin, both perturbative and non-perturbative. In particular, the existence of the dimension-two gluon-condensate is discussed, and confirmed.

version 2, corrected

References in corpus (4)

• Dynamical Twisted Mass Fermions with Light Quarks: Simulation and Analysis Details
• Dynamical Twisted Mass Fermions with Light Quarks
• On the reduction of hypercubic lattice artifacts
• Ghost-gluon coupling, power corrections and ${\Lambda }_{\overline{\mathrm{MS}}}$ from twisted-mass lattice QCD at Nf=2