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5 papers · 2 filters
Stability of complex Langevin dynamics in effective models
Gert Aarts, Frank A. James, Jan M. Pawlowski +3
The sign problem at nonzero chemical potential prohibits the use of importance sampling in lattice simulations. Since complex Langevin dynamics does not rely on importance sampling…
Gauge cooling in complex Langevin for QCD with heavy quarks
Erhard Seiler, Dénes Sexty, Ion-Olimpiu Stamatescu
We employ a new method, "gauge cooling", to stabilize complex Langevin simulations of QCD with heavy quarks. The results are checked against results obtained with reweigthing; we f…
Toward an understanding of short distance repulsions among baryons in QCD -- NBS wave functions and operator product expansion --
Sinya Aoki, Janos Balog, Peter Weisz
We report on our recent attempts to determine the short distance behaviors of general 2-baryon and 3-baryon forces, which are defined from the Nambu-Bethe-Salpeter(NBS) wave functi…
Drastic Reduction of Cutoff Effects in 2-d Lattice O(N) Models
J. Balog, F. Niedermayer, M. Pepe +2
We investigate the cutoff effects in 2-d lattice O(N) models for a variety of lattice actions, and we identify a class of very simple actions for which the lattice artifacts are ex…
Lattice determination of the Decay Amplitude
T. Blum, P. A. Boyle, N. H. Christ +13
We describe the computation of the amplitude A_2 for a kaon to decay into two pions with isospin I=2. The results presented in the letter Phys.Rev.Lett. 108 (2012) 141601 from an a…