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Verification of O ( a ) improvement
| Content Provider | Semantic Scholar |
|---|---|
| Author | Wittig, Hartmut |
| Copyright Year | 2008 |
| Abstract | One of the most important systematic effects in lattice simulations of QCD is the finiteness of the lattice spacing a. It is well known that physical observables computed using the Wilson action are subject to corrections of order a, which can be rather large. In order to obtain reliable results in the continuum limit it is desirable to reduce lattice artefacts, either through the Symanzik improvement programme [1,2], or by employing a renormalisation group approach [3,4]. Recently the ALPHA Collaboration has carried out the Symanzik improvement programme to leading order through a non-perturbative determination of the O(a) improved fermion action and isospin currents [5–8]. This approach should lead to the complete removal of lattice artefacts of order a in spectral quantities and matrix elements of local currents, so that the remaining cutoff effects are of order a. The non-perturbatively improved action has already been employed in a number of simulations in the quenched approximation [9–11]. Here, we assess the impact of nonperturbative improvement on the calculation of the mass spectrum and decay constants in the light hadron sector, analyse the scaling behaviour and estimate the size of residual lattice artefacts. The general expression of the O(a) improved fermion action reads [12] |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://arxiv.org/pdf/hep-lat/9710013v1.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Apache Continuum Catalog Service for the Web Coefficient Decay Constant Dynamical system Formal system Image scaling Lattice QCD Lattice constant Lattice gauge theory Mass Spectrometry Mesons Morphologic artifacts Observable Perturbation theory (quantum mechanics) Quantity Quenched approximation Simulation Test scaling Triune continuum paradigm Verification of Theories |
| Content Type | Text |
| Resource Type | Article |
