Further Study of BRST-Symmetry Breaking on the Lattice
| Autor: | Cucchieri, Attilio, Mendes, Tereza |
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| Rok vydání: | 2016 |
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| Druh dokumentu: | Working Paper |
| Popis: | We evaluate the so-called Bose-ghost propagator Q(p^2) for SU(2) gauge theory in minimal Landau gauge, considering lattice volumes up to 120^4 and physical lattice extents up to 13.5 f. In particular, we investigate discretization effects, as well as the infinite-volume and continuum limits. We recall that a nonzero value for this quantity provides direct evidence of BRST-symmetry breaking, related to the restriction of the functional measure to the first Gribov region. Our results show that the prediction (from cluster decomposition) for Q(p^2) in terms of gluon and ghost propagators is better satisfied as the continuum limit is approached. Comment: 6 pages, 3 figures; 34th annual International Symposium on Lattice Field Theory, 24-30 July 2016 , University of Southampton, UK |
| Databáze: | arXiv |
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