The Quark-Gluon Mixed Condensate g<\bar{q} sigma G q> in SU(3)c Quenched Lattice QCD

Abstract

Using the SU(3)c lattice QCD with the Kogut-Susskind fermion at the quenched level, we study the quark-gluon mixed condensate g<\bar{q} sigma G q>, which is another chiral order parameter. For each current quark mass of m_q=21, 36, 52 MeV, we generate 100 gauge configurations in the 16^4 lattice with β= 6.0, and perform the measurement of the mixed condensate at 16 points in each gauge configuration. Using the 1600 data for each m_q, we find the ratio between the mixed condensate and the quark condensate, m_0^2 = g<\bar{q} sigma G q>/ <\bar{q}q> \simeq 2.5 GeV^2 at the lattice scale in the chiral limit. The large value of the mixed condensate suggests its importance in the operator product expansion in QCD.

9 pages, REVTeX4, 3 figures

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Cited by in corpus (14)

• Recent Progress in QCD Condensate Evaluations and Sum Rules
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• Higher twists in polarized DIS and the size of the constituent quark
• Thermal effects on quark-gluon mixed condensate g<\bar{q} σG q> from lattice QCD
• Dynamical chiral-symmetry breaking at T=0 and $T\ne 0$ in the Schwinger-Dyson equation with lattice QCD data
• Mixed Quark-Gluon condensate at finite temperature and density in the global color symmetry model
• Quark-gluon mixed condensate of the QCD vacuum in Holographic QCD
• Nonlocal and Mixed Condensates Tests of Gauge/String Duality
• The lattice QCD simulation of the quark-gluon mixed condensate g<\bar{q} σG q> at finite temperature and the phase transition of QCD
• Mixed heavy-quark-gluon condensate in the stochastic vacuum model and dual superconductor
• Chiral random matrix theory for colorful quark-antiquark condensates
• Quark-gluon mixed condensate for the SU(2) light-flavor sector at finite temperature