Rakow, Paul E.L. (2005) Stochastic perturbation theory and the gluon condensate. In: XXIIIrd International Symposium on Lattice Field Theory, 25-30 July 2005, Trinity College, Dublin, Ireland.
Available under License Creative Commons Attribution Non-commercial Share Alike.
On the lattice searching for the gluon condensate is difficult because a large perturbative contribution to the expectation value of the action has to be subtracted before looking for a small contribution from a possible gluon condensate. The perturbative calculation therefore has to be very precise. We use a modified version of stochastic perturbation theory to calculate a perturbative series in a boosted coupling, which converges more rapidly than the series with the usual lattice coupling, reducing the uncertainties in our results. We do not see any condensate of dimension two, as suggested by some earlier lattice studies, but we do find a contribution from a dimension four condensate. The value of this condensate is approximately 0.04(1) GeV^4, but with large uncertainties.
|Item Type:||Conference or Workshop Item (Paper)|
|Additional Information:||LTH 668; arXiv Number: arXiv:hep-lat/0510046v1. Additional citation information: PoS LAT2005 (2005) 284. Article ID: 284. 6 pages.|
|Uncontrolled Keywords:||perturbative contribution; perturbative series; boosted coupling; lattice coupling; dimension four condensate; lattice|
|Subjects:||Q Science > QC Physics|
|Departments, Research Centres and Related Units:||Academic Faculties, Institutes and Research Centres > Faculty of Science > Department of Mathematical Sciences|
|Publisher's Statement:||Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence. The author(s) and right holder(s) of such contributions grant(s) to all users a free, irrevocable, worldwide, right of access to, and a license to copy, use, distribute, transmit and display the work publicly and to make and distribute derivative works, in any digital medium for any responsible purpose, subject to proper attribution of authorship (community standards, will continue to provide the mechanism for enforcement of proper attribution and responsible use of the published work, as they do now), as well as the right to make small numbers of printed copies for their personal use.|
|Deposited On:||18 Aug 2008 12:06|
|Last Modified:||20 May 2011 15:55|
Repository Staff Only: item control page