Follana, E., Mason, Q., Davies, C. , Hornbostel, K., Lepage, P. and Trottier, H. (2004) Further improvements to staggered quarks. Nuclear Physics, Section B, Proceedings Supplements, 129-30, pp. 447-449. (doi: 10.1016/S0920-5632(03)02610-0)
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Publisher's URL: http://dx.doi.org/10.1016/S0920-5632(03)02610-0
Abstract
The improved staggered quark action has enabled breakthrough calculations of QCD with three light dynamical quarks. The largest remaining <I>a</I><sup>2</sup> scaling violations come from "taste- changing" interactions, which are significantly reduced over naive quarks because of carefully chosen smearing of the gauge links. Here we examine further improvements to the quark action and show that additional smearing of the links can reduce the taste-changing errors by another factor of two, whilst retaining a fully <I>a</I><sup>2</sup> -improved action. The taste- changing errors can be understood within a perturbative calculation of the four-quark operators that appear at one-loop. We also discuss unquenching techniques with such a highly improved action.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Follana, Dr Eduardo and Davies, Professor Christine |
| Authors: | Follana, E., Mason, Q., Davies, C., Hornbostel, K., Lepage, P., and Trottier, H. |
| Subjects: | Q Science > QC Physics |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Nuclear Physics, Section B, Proceedings Supplements |
| Publisher: | Elsevier BV |
| ISSN: | 0920-5632 |
| ISSN (Online): | 1873-3832 |
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