Two-point functions of quenched lattice QCD in Numerical Stochastic Perturbation Theory. (II) The Gluon propagator in Landau gauge
Aug, 2010
20 pages
Published in:
- Nucl.Phys.B 842 (2011) 122-139
e-Print:
- 1008.2617 [hep-lat]
Report number:
- HU-EP-10-37,
- LU-ITP-2010-01,
- BI-TP-2010-21
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Abstract: (Elsevier)
This is the second of two papers devoted to the perturbative computation of the ghost and gluon propagators in SU ( 3 ) Lattice Gauge Theory. Such a computation should enable a comparison with results from lattice simulations in order to reveal the genuinely non-perturbative content of the latter. The gluon propagator is computed by means of Numerical Stochastic Perturbation Theory: results range from two up to four loops, depending on the different lattice sizes. The non-logarithmic constants for one, two and three loops are extrapolated to the lattice spacing a → 0 continuum and infinite volume V → ∞ limits.Note:
- 20 pages, 13 figures, version to be published, references added in the Introduction, figs 3,4,5 changed for better visibility
- gluon: propagator
- ghost: propagator
- perturbation theory: stochastic
- two-point function
- Landau gauge
- gauge field theory: SU(3)
- numerical calculations
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