Bonn 2010 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 26: Gittereichtheorie II
T 26.6: Vortrag
Dienstag, 16. März 2010, 18:00–18:15, HG XIII
Lattice Investigations of Baryon Structure at Light Quark Masses — •Frank Winter — University of Regensburg, Regensburg, Germany
With simulations with dynamical fermions approaching the physical light quark mass we start to get improved control over the approach to the chiral limit. In this talk we will report on recent results from the QCDSF collaboration on the investigation of baryon structure.
We will focus on results for the axial charge of the nucleon for Nf=2 degenerate flavours of Clover fermions. Here first results are available for pion masses reaching as low as 170 MeV. A comparison can be made with results from effective theories.
Furthermore, we will report on initial results for the axial coupling of Hyperons. Here we use configurations with Nf=2+1 dynamical favours of SLiNC fermions. With the strange quark mass as an additional dynamical degree of freedom in our simulations we avoid the need for a partially quenched approximation when investigating the properties of particles like the Hyperons, where the quark masses are far from being degenerate.