Mesonic and baryonic correlation functions at fine lattice spacings

Details Mesonic and baryonic correlation functions at fine lattice spacings Mesonic and baryonic correlation functions at fine lattice spacings

2009-10-29

arxiv.org/abs/0910.5578v1

PoS LAT2009:095,2009

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 4 figures, presented at 27 International Symposium on Lattice Field Theory, July 26-31, 2009, Peking University, Beij

Scientific paper

We report on our on-going project to compute mesonic and baryonic two- and three-point correlation functions in simulations using Nf=2 flavours of O(a) improved Wilson quarks and the Wilson plaquette action. We present performance figures for the DD-HMC algorithm on commodity cluster hardware and discuss the issue of critical slowing down, which is particularly pronounced for the topological charge. The effectiveness of stochastic noise sources and Jacobi smearing are investigated. Our preliminary results obtained at three quark masses on 96x48^3 at beta=5.5 imply that the lattice spacing is about 0.06 fm, while the smallest pion mass in the current runs is around 360 MeV, which corresponds to m_pi*L=5.3.

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