ar X iv : 0 71 0 . 06 65 v 1 [ he p - la t ] 2 O ct 2 00 7 Infrared exponents of gluon and ghost propagators from Lattice QCD
نویسنده
چکیده
The compatibility of the pure power law infrared solution of QCD Dyson-Schwinger equations (DSE) and lattice data for the gluon and ghost propagators in Landau gauge is discussed. For the gluon propagator, the lattice data is compatible with the DSE infrared solution with an exponent κ ∼ 0.53, measured using a technique that suppresses finite volume effects and allows to model these corrections to the lattice data. For the ghost propagator, the lattice data does not seem to follow the infrared DSE power law solution.
منابع مشابه
ar X iv : 0 71 0 . 06 69 v 1 [ he p - la t ] 2 O ct 2 00 7 Gauge fixing methods and Gribov copies effects in lattice QCD
We compare two Landau gauge fixing methods, aiming to find the global maximum of the gauge fixing functional. Moreover, a systematic effect of Gribov copies in the gluon and ghost propaga-tors computed in Landau gauge is presented and discussed.
متن کاملar X iv : 0 71 0 . 24 70 v 1 [ he p - la t ] 1 2 O ct 2 00 7 Lattice Approach to Light Scalars
I report on lattice QCD calculations that study the properties of the a0 and f0 mesons.
متن کاملar X iv : 0 71 0 . 05 52 v 1 [ he p - la t ] 2 O ct 2 00 7 High loop renormalization constants by NSPT : a status report
We present an update on Numerical Stochastic Perturbation Theory projects for Lattice QCD, which are by now run on apeNEXT. As a first issue, we discuss a strategy to tackle finite size effects which can be quite sizeable in the computation of logarithmically divergent renormalization constants. Our first high loop determination of quark bilinears for Wilson fermions was limited to finite const...
متن کاملar X iv : 0 71 0 . 41 97 v 1 [ he p - la t ] 2 3 O ct 2 00 7 The equation of state at high temperatures from lattice QCD
We present results for the equation of state upto previously unreachable, high temperatures. Since the temperature range is quite large, a comparison with perturbation theory can be done directly.
متن کاملar X iv : 0 71 0 . 09 85 v 1 [ he p - la t ] 4 O ct 2 00 7 Hard Hadron spectroscopy
I review lattice QCD calculations that compute the masses of the flavour singlet pseudoscalar mesons. I describe the progress in computing the mass spectrum of light 0 ++ mesons using lattice QCD. I also compare the results for basic quantities such as f π and m ρ , from various different formalisms of lattice QCD. I discuss the physical value of r 0 .
متن کامل