When analyzed in terms of the Symanzik expansion, lattice correlators of multi-local (gauge-invariant) operators with non-trivial continuum limit exhibit in maximally twisted lattice QCD "infrared divergent" cutoff effects of the type a(2k)/(m(pi)(2))(h), 2k >= h >= 1 (k, h integers), which tend to become numerically large when the pion mass gets small. We prove that, if the action is O(a) improved a la Symanzik or, alternatively, the critical mass counter-term is chosen in some "optimal" way, these lattice artifacts are reduced to terms that are at worst of the order a(2)(a(2)/m(pi)(2))(k-1), k >= 1. This implies that the continuum extrapolation of lattice results is smooth at least down to values of the quark mass, m(q), satisfying the order of magnitude inequality mq > a(2)Lambda(3)(QCD).
Frezzotti R., M.G. (2006). Reducing cuto effects in maximally twisted LQCD close to the chiral limit. JOURNAL OF HIGH ENERGY PHYSICS(4).
Tipologia: | Articolo su rivista |
Citazione: | Frezzotti R., M.G. (2006). Reducing cuto effects in maximally twisted LQCD close to the chiral limit. JOURNAL OF HIGH ENERGY PHYSICS(4). |
URL: | hep-lat/0503034 |
Lingua: | English |
Settore Scientifico Disciplinare: | Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici |
Revisione (peer review): | Sì, ma tipo non specificato |
Tipo: | Articolo |
Rilevanza: | Rilevanza internazionale |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1088/1126-6708/2006/04/038 |
Stato di pubblicazione: | Pubblicato |
Data di pubblicazione: | 2006 |
Titolo: | Reducing cuto effects in maximally twisted LQCD close to the chiral limit |
Autori: | |
Autori: | Frezzotti R., Martinelli G., Papinutto M., Rossi G. |
Appare nelle tipologie: | 01 - Articolo su rivista |