Comparing Di erent Improvement Programs for theN - Vector


We discuss the connection between various types of improved actions in the context of the two-dimensional-model. We also discuss spectrum-improved actions showing that these actions do not have any improved behaviour. An O(a 2) on-shell improved action with all couplings deened on a plaquette and satisfying reeection positivity is also explicitly constructed.

Cite this paper

@inproceedings{Caracciolo2007ComparingDE, title={Comparing Di erent Improvement Programs for theN - Vector}, author={Sergio Caracciolo}, year={2007} }