2014/05/07 by Attilio Cucchieri, David Dudal, Tereza Mendes +1
Physics and Astronomy · #BRST quantization #Gauge theory #High-Energy Particle Collisions Research #Lattice gauge theory #Mathematical physics #Particle physics theoretical and experimental studies #Physics #Propagator #Quantum Chromodynamics and Particle Interactions #Quantum electrodynamics #Quantum mechanics #hep-lat #hep-th
paper · pdf · doi:10.1103/physrevd.90.051501
published as Phys. Rev. D 90, 051501 (2014) · 4 pages, 2 figures, 1 table
arxiv created 2014/05/07 · openalex publication_date 2014/09/03 · arxiv updated 2014/09/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
The Bose-ghost propagator has been proposed as a carrier of the confining force in Yang-Mills theories in minimal Landau gauge. We present the first numerical evaluation of this propagator, using lattice simulations for the SU(2) gauge group in the scaling region. Our data are well described by a simple fitting function, which is compatible with an infrared-enhanced Bose-ghost propagator. This function can also be related to a massive gluon propagator in combination with an infrared-free (Faddeev-Popov) ghost propagator. Since the Bose-ghost propagator can be written as the vacuum expectation value of a BRST-exact quantity and should therefore vanish in a BRST-invariant theory, our results provide the first numerical manifestation of BRST-symmetry breaking due to restriction of gauge-configuration space to the Gribov region.