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- Gottfried Goldrian, Thomas Huth, +21 authors Zoltán Fodor
- Computing in Science & Engineering
- 2008

Application-driven computers for lattice gauge theory simulations have often been based on system-on-chip designs, but the development costs can be prohibitive for academic project budgets. An alternative approach uses compute nodes based on a commercial processor tightly coupled to a custom-designed network processor. Preliminary analysis shows that this… (More)

- Heinz Baier, Hans Boettiger, +32 authors Frank Winter
- ArXiv
- 2009

H. Baier1, H. Boettiger1, M. Drochner2, N. Eicker2,3, U. Fischer1, Z. Fodor3, A. Frommer3, C. Gomez4, G. Goldrian1, S. Heybrock5, D. Hierl5, M. Hüsken3, T. Huth1, B. Krill1, J. Lauritsen1, T. Lippert2,3, T. Maurer∗5, B. Mendl5, N. Meyer5, A. Nobile5, I. Ouda6, M. Pivanti7, D. Pleiter†8, M. Ries1, A. Schäfer5, H. Schick1, F. Schifano7, H. Simma8,9, S.… (More)

This is a progress report on 2+1 flavor simulation with the FP action on a lattice with spatial size L = 1.2fm. Since mud is quite small in our simulation we are in the delta regime for the two light flavors where the low lying excitations are described by a quantum mechanical rotator. From here we extract the low energy constant F . We also measure the AWI… (More)

- P Hasenfratz, D Hierl, +4 authors M Weingart
- 2009

We generated configurations with the parametrized fixed-point Dirac operator DFP on a (1.6 fm) 4 box at a lattice spacing a = 0.13 fm. We compare the distributions of the three lowest k = 1, 2, 3 eigenvalues in the ν = 0, 1, 2 topological sectors with that of the Random Matrix Theory predictions. The ratios of expectation values of the lowest eigenvalues… (More)

- Christof Gattringer, Dieter Hierl, Rainer Pullirsch
- 2004

Since the pion is the goldstone boson of the spontaneous breaking of chiral symmetry, observables related to the pion give insight into the chiral dynamics of QCD. For example the pion scattering length is a parameter entering the effective chiral lagrangian of QCD and a precise determination of this observable in an ab-initio lattice calculation is… (More)

We report on a study of the pentaquark Θ(1540), using a variety of different interpolating fields. We use Chirally Improved fermions in combination with Jacobi smeared quark sources to improve the signal and get reliable results even for small quark masses. The results of our quenched calculations, which have been done on a 12 × 24 lattice with a lattice… (More)

We report on a study of the pentaquark Θ+(1540), using a variety of different interpolating fields. We use Chirally Improved fermions in combination with Jacobi smeared quark sources to improve the signal and get reliable results even for small quark masses. The results of our quenched calculations, which have been done on a 123×24 lattice with a lattice… (More)

c © 2006 by John von Neumann Institute for Computing Permission to make digital or hard copies of portions of this work for personal or classroom use is granted provided that the copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. To copy otherwise requires prior… (More)

- E N E Van Dalen, C Fuchs, +122 authors Amand Faessler
- 2005

NQMA-THE-05 Self consistent and covariant propagation of pions, nucleon and isobar resonances 145 in cold nuclear matter NQMA-THE-13 Collective flow of open and hidden charm in the hadron/string picture 153 NQMA-THE-31 The progress and the crisis in the understanding QCD phase diagram 171 Symmetric nuclear matter has been studied extensively. However ,… (More)

- T. Burch, C. Gattringer, +6 authors A. Schäfer
- 2005

T. Burch, C. Gattringer, M. Göckeler, C. Hagen, P. Hasenfratz, D. Hierl, C.B. Lang, F. Niedermayer, A. Schäfer, and S. Solbrig [BGR-Collaboration] Institut für Theoretische Physik, Universität Regensburg, D-93040 Regensburg, Germany; Institut für Theoretische Physik, Universität Leipzig, D-04109 Leipzig, Germany; Institut für Theoretische Physik,… (More)