Vacuum expectation value of A^2 from LQCD

Abstract

We argue from LQCD that there is a non vanishing v.e.v of $A_a^{\mu }{A}_{\mu }^a$ in QCD in the Landau gauge. We use operator product expansion to provide a clear definition of $A_a^{\mu }{A}_{\mu }^a$ and extract a number both in the quenched and unquenched case.

10 pages, 5 figures, talk at the workshop "The many faces of QCD", November 2-5, 2010, Gent, Belgium

References in corpus (4)

• Ghost-gluon coupling, power corrections and ${\Lambda }_{\overline{\mathrm{MS}}}$ from twisted-mass lattice QCD at Nf=2
• Electric-magnetic asymmetry of the A^2 condensate and the phases of Yang-Mills theory
• Renormalisation of quark propagators from twisted-mass lattice QCD at $N_f$=2
• ${\alpha }_S$ from Lattice QCD: progresses and perspectives for a realistic full-QCD determination of the running Strong coupling

Cited by in corpus (4)

• A local and renormalizable framework for the gauge-invariant operator $A_{\min }^2$ in Euclidean Yang-Mills theories in linear covariant gauges
• Quark mass and chiral condensate from the Wilson twisted mass lattice quark propagator
• Boundary terms in quantum field theory and the spin structure of QCD
• RI/MOM renormalization constants (N_f=4) and the strong coupling constant (N_f=2+1+1) from twisted-mass QCD