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Dynamical twisted mass fermions with light quarks

Boucaud, Ph.; Dimopoulus, P.; Farchioni, F.; Frezzotti, R.; Gimenez, V.; Herdoiza, G.; Jansen, K.; Lubicz, V.; Martinelli, G.; McNeile, C.; Michael, C.; Montvay, I.; Palao, D.; Papinutto, M.; Pickavance, J.; Rossi, G.C.; Scorzato, L.; Shindler, A.; Simula, S.; Urbach, C. and Wenger, U. (2007) Dynamical twisted mass fermions with light quarks. Physics Letters B, 650 (4). pp. 304-311. ISSN 0370-2693

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Official URL: http://www.elsevier.com/wps/find/journaldescriptio...

Abstract

We present results of dynamical simulations with 2 flavours of degenerate Wilson twisted mass quarks at maximal twist in the range of pseudo scalar masses from 300 to 550 MeV. The simulations are performed at one value of the lattice spacing a \lesssim 0.1 fm. In order to have O(a) improvement and aiming at small residual cutoff effects, the theory is tuned to maximal twist by requiring the vanishing of the untwisted quark mass. Precise results for the pseudo scalar decay constant and the pseudo scalar mass are confronted with chiral perturbation theory predictions and the low energy constants F, \bar{l}_3 and \bar{l}_4 are evaluated with small statistical errors.

Item Type:Article
Additional Information:LTH 737. arXiv Number: arXiv:hep-lat/0701012v2. Available online 13 May 2007. Website date: 5 July 2007.
Uncontrolled Keywords:CHIRAL PERTURBATION-THEORY; MONTE-CARLO ALGORITHM; GROSS-NEVEU MODEL; YANG-MILLS THEORY; LATTICE QCD; PHASE-STRUCTURE; WILSON QUARKS; HMC ALGORITHM; GAUGE ACTIONS; 2 FLAVORS
Subjects:Q Science > QC Physics
Departments, Research Centres and Related Units:Academic Faculties, Institutes and Research Centres > Faculty of Science > Department of Mathematical Sciences
DOI:10.1016/j.physletb.2007.04.054
Related URLs:
Refereed:No
Status:Published
ID Code:279
Deposited On:15 Aug 2008 11:26
Last Modified:22 Mar 2012 12:18

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