Bonn 2010 – scientific programme

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T: Fachverband Teilchenphysik

T 25: Gittereichtheorie I

T 25.2: Talk

Monday, March 15, 2010, 17:00–17:15, HG XIII

Towards the N_f=2 deconfinement transition temperature with O(a) improved Wilson fermions — •Bastian B. Brandt¹, Owe Philipsen², Hartmut Wittig¹, and Lars Zeidlewicz² — ¹Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, Johann-Joachim Becher-Weg 45, 55099 Mainz, Germany — ²Institut für Theoretische Physik, Wilhelm-Klemm-Str. 9, 48149 Münster, Germany

A lot of effort in lattice simulations over the last years has been spent to observe the QCD deconfinement transition. Most state of the art simulations use so called rooted staggered fermions, controversially discussed in the literature, and/or, despite the ongoing effort, are affected by uncertainties and systematic effects, such as coarse lattices and heavy quarks. Therefore it is important to probe the transition with other fermion actions and improve systematics. Nowadays, first results with nonperturbatively O(a) improved Wilson fermions and twisted mass fermions are available, leaving some of the systematics issues unchanged. I report on an ongoing study of the transition, using two degenerate flavours of nonperturbatively O(a) improved Wilson fermions. We start with N_t=12 lattices, aiming at chiral and continuum limit with very light quarks and lattices, at least up to N_t=16.