A first look at Landau-gauge propagators in G(2) Yang-Mills theory

作者：Maas Axel^*; Olejnik Stefan

来源：Journal of High Energy Physics, 2008, (2): 070.

• nonperturbative effects
• field theories in lower dimensions
• lattice gauge field theories
• confinement

G(2) Yang-Mills theory is an interesting laboratory to investigate non-perturbative effects. On one hand, no conventional quark confinement via a linearly rising potential is present. On the other hand, its thermodynamic properties are similar to ordinary SU(N) Yang-Mills theory. Finally, it has been conjectured that gluons are removed from the physical spectrum in the same way as in SU( N) Yang-Mills theory. The last claim will be explored by determining the Landau-gauge ghost and gluon propagators, as well as the Faddeev-Popov operator eigenspectrum, in G(2) lattice gauge theory in two and three dimensions. The results are found to agree qualitatively with the SU( 2) and SU( 3) case. Therefore, the conjecture that Yang-Mills theories with different gauge groups are qualitatively similar on the level of their Landau gauge Green's functions is supported.

• 出版日期2008-2