Hadronic Physics

Project Investigator Professor Christopher Michaels

Scientific/ Technical Objectives Developing simulation and analysis algorithms for models of quantum chromodynamics (QCD)

Role of NW-GRID We use supercomputing power (many teraflops) to perform the main QCD simulations. In order to extract useful scientific results, we need to analyse these data sets - basically to invert large sparse matrices (size 50 million x 50 million) and this runs efficiently on a 4-core node of NW-GRID.

Applications Software Developed within an Integrated Infrastructure Initiative supported project that involves 80 different EU Higher Educational establishments in most EU countries.

Grid Software Scripts sitting upon Globus infrastructure

Progress to date Liverpool University is part of a European-wide collaboration (ETMC). Part of our computational requirements are to invert many large sparse matrices (50 million by 50 million). Our MPI codes achieve this efficiently on one (4 core) node. We can then farm several nodes in parallel. This allows us to explore flavour-singlet mesons (the eta' meson in particular) which are a long-standing problem in QCD.

Publications

"Dynamical Twisted Mass Fermions with Light Quarks", Ph. Boucaud, P. Dimopoulos, F. Farchioni, R. Frezzotti, V. Gimenez, G. Herdoiza, K. Jansen, V. Lubicz, G. Martinelli, C. McNeile, C. Michael, I. Montvay, D. Palao, M. Papinutto, J. Pickavance, G.C. Rossi, L. Scorzato, A. Shindler, S. Simula, C. Urbach, U. Wenger (ETM collaboration), Phys. Lett. B (in press) (2007) hep-lat/0701012

"Flavour singlet mesons from twisted mass QCD", C. Michael and C. Urbach et al., (in preparation)