CLS 2+1 flavor simulations at physical light-and strange-quark masses

¹ Helmholtz-Institut Mainz, 55099 Mainz, Germany
² Johannes Gutenberg Universität Mainz, 55099 Mainz, Germany
³ John von Neumann Institute for Computing (NIC), DESY, Platanenallee 6, 15738 Zeuthen, Germany
⁴ Institute for Theoretical Physics, University of Regensburg, 93040 Regensburg, Germany

^* Speaker, e-mail: damohler@uni-mainz.de

Published online: 26 March 2018

Abstract

We report recent efforts by CLS to generate an ensemble with physical lightand strange-quark masses in a lattice volume of 192 × 96³ at β = 3:55 corresponding to a lattice spacing of 0:064 fm. This ensemble is being generated as part of the CLS 2+1 flavor effort with improved Wilson fermions. Our simulations currently cover 5 lattice spacings ranging from 0:039 fm to 0:086 fm at various pion masses along chiral trajectories with either the sum of the quark masses kept fixed, or with the strange-quark mass at the physical value. The current status of simulations is briefly reviewed, including a short discussion of measured autocorrelation times and of the main features of the simulations. We then proceed to discuss the thermalization strategy employed for the generation of the physical quark-mass ensemble and present first results for some simple observables. Challenges encountered in the simulation are highlighted.