2020-04-04T15:23:33Z
http://digital.csic.es/dspace-oai/request
oai:digital.csic.es:10261/9218
2017-01-25T12:31:35Z
com_10261_61
com_10261_4
col_10261_314
Dynamical twisted mass fermions with light quarks
Boucaud, Ph.
Dimopoulos, P.
Farchioni, F.
Frezzotti, R.
Giménez Gómez, Vicente
Herdoiza, Gregorio
Jansen, K.
Lubicz, V.
Martinelli, G.
McNeile, C.
Michael, C.
Montvay, I.
Palao, David
Papinutto, M.
Pickavance, J.
Rossi, G. C.
Scorzato, L.
Shindler, Andrea
Simula, S.
Urbach, C.
Wenger, U.
Chiral perturbation theory
Monte Carlo algorithm
Gross-Neveu model
Yang-Mills theory
Lattice QCD
Wilson quarks
HMC algorithm
Gauge actions
European Twisted Mass (ETM) Collaboration
8 pages, 3 figures.-- ISI Article Identifier: 000248138100016.-- ArXiv pre-print available at: http://arxiv.org/abs/hep-lat/0701012
Printed version published Jul 5, 2007.
We present results of dynamical simulations of N-f = 2 degenerate Wilson twisted mass quarks at maximal twist in the range of pseudo scalar masses 300 MeV less than or similar to m(PS) less than or similar to 550 MeV. Reaching such small masses was made possible owing to a recently developed variant of the HMC algorithm. The simulations are performed at one value of the lattice spacing a less than or similar to 0.1 fm. In order to have O(a) improvement and aiming at small residual O(a^2) 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, (l)[overline](3) and (l)[overline](4) are evaluated with small statistical errors.
This work has been supported in part by the DFG Sonderforschungsbereich/Transregio SFB/TR9-03 and the EU Integrated Infrastructure Initiative Hadron Physics (I3HP) under contract RII3-CT-2004-506078. We also thank the DEISA Consortium
(co-funded by the EU, FP6 project 508830), for support within the DEISA Extreme Computing Initiative (www.deisa.org). G.C.R. and R.F. thank MIUR (Italy) for partial financial support
under the contract PRIN04. V.G. and D.P. thank MEC (Spain) for partial financial support under grant FPA2005-00711.
Peer reviewed
2008-12-10T12:48:21Z
2008-12-10T12:48:21Z
2007-05-13
artículo
Physics Letters B 650(4): 304-311 (2007)
0370-2693
http://hdl.handle.net/10261/9218
10.1016/j.physletb.2007.04.054
eng
http://dx.doi.org/10.1016/j.physletb.2007.04.054
openAccess
2373 bytes
text/plain
Elsevier