Hadron electric polarizability -- finite volume corrections

Details Hadron electric polarizability -- finite volume corrections Hadron electric polarizability -- finite volume corrections

2010-11-29

arxiv.org/abs/1011.6309v1

PoS Lattice2010:131,2010

Physics

High Energy Physics

High Energy Physics - Lattice

8 pages, 5 figure, Talk presented at the XXVIII International Symposium on Lattice Field Theory, Lattice2010, Villasimius, Ita

Scientific paper

We use the background field method to extract the polarizability for the neutral "pion". In our previous study we found that the polarizability for this system is negative which is believed to be a finite volume artifact. To address this issue, we carry out simulations for different lattice sizes and we also look at the influence of the boundary conditions on these results. We find that for pion masses lower than 400 MeV the polarizability remains negative even on larger lattices. An infinite volume extrapolation is attempted, but the results are not conclusive due mainly to a lack of an analytical form for the finite volume corrections for this system.

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