Decontracted double BRST on the lattice
| dc.creator | von Smekal, Lorenz | |
| dc.creator | Ghiotti, Marco | |
| dc.creator | Williams, Anthony G | |
| dc.date | 2008-07-03 | |
| dc.date.accessioned | 2026-07-07T11:52:14Z | |
| dc.date.available | 2026-07-07T11:52:14Z | |
| dc.description | We present the Curci-Ferrari model on the lattice. In the massless case the topological interpretation of this model with its double BRST symmetry relates to the Neuberger 0/0 problem which we extend to include the ghost/anti-ghost symmetric formulation of the non-linear covariant Curci-Ferrari gauges on the lattice. The introduction of a Curci-Ferrari mass term, however, serves to regulate the 0/0 indeterminate form of physical observables observed by Neuberger. While such a mass m decontracts the double BRST/anti-BRST algebra, which is well-known to result in a loss of unitarity, observables can be meaningfully defined in the limit m to 0 via l'Hospital's rule. At finite m the topological nature of the partition function used as the gauge fixing device seems lost. We discuss the gauge parameter xi and mass m dependence of the model and show how both cancel when m = m(xi) is appropriately adjusted with xi. | |
| dc.description | 18 pages, no figures | |
| dc.identifier | https://arxiv.org/abs/0807.0480 | |
| dc.identifier | http://arxiv.org/abs/0807.0480 | |
| dc.identifier | Phys.Rev.D78:085016,2008 | |
| dc.identifier | doi:10.1103/PhysRevD.78.085016 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/204162 | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Decontracted double BRST on the lattice | |
| dc.type | text |