Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2005-04-28
Phys.Lett.B628:125-130,2005
Physics
High Energy Physics
High Energy Physics - Lattice
9 pages, 3 figures; revised version appearing in PLB
Scientific paper
10.1016/j.physletb.2005.09.020
The vector meson mass is extracted from a large sample of partially quenched, two-flavor lattice QCD simulations. For the first time, discretisation, finite-volume and partial quenching artefacts are treated in a unified framework which is consistent with the low-energy behaviour of QCD. This analysis incorporates the leading infrared behaviour dictated by chiral effective field theory. As the two-pion decay channel cannot be described by a low-energy expansion alone, a highly-constrained model for the decay channel of the rho-meson is introduced. The latter is essential for extrapolating lattice results from the quark-mass regime where the rho is observed to be a physical bound state.
Allton Chris R.
Armour Wes
Leinweber Derek B. .
Thomas Anthony W.
Young Richard D.
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