Recent conceptual, algorithmic and technical advances allow numerical simulations of lattice QCD with Wilson quarks to be performed at significantly smaller quark masses than was possible before. Here we report on simulations of two-flavour QCD at sea-quark masses from slightly above to approximately 1/4 of the strange-quark mass, on lattices with up to 64 × 323 points and spacings from 0.05 to 0.08 fm. Physical sea-quark effects are clearly seen on these lattices, while the lattice effects appear to be quite small, even without O(a) improvement. A striking result is that the dependence of the pion mass on the sea-quark mass is accurately described by leading-order chiral perturbation theory up to meson masses of about 500 MeV.

Del Debbio, L., Giusti, L., Luescher, M., Petronzio, R., Tantalo, N. (2007). QCD with light Wilson quarks on fine lattices (I): first experiences and physics results. JOURNAL OF HIGH ENERGY PHYSICS(2) [10.1088/1126-6708/2007/02/056].

QCD with light Wilson quarks on fine lattices (I): first experiences and physics results

PETRONZIO, ROBERTO;TANTALO, NAZZARIO
2007-01-01

Abstract

Recent conceptual, algorithmic and technical advances allow numerical simulations of lattice QCD with Wilson quarks to be performed at significantly smaller quark masses than was possible before. Here we report on simulations of two-flavour QCD at sea-quark masses from slightly above to approximately 1/4 of the strange-quark mass, on lattices with up to 64 × 323 points and spacings from 0.05 to 0.08 fm. Physical sea-quark effects are clearly seen on these lattices, while the lattice effects appear to be quite small, even without O(a) improvement. A striking result is that the dependence of the pion mass on the sea-quark mass is accurately described by leading-order chiral perturbation theory up to meson masses of about 500 MeV.
2007
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/02 - FISICA TEORICA, MODELLI E METODI MATEMATICI
English
Con Impact Factor ISI
lattice QCD; Chiral Lagrangians; hybrid Monte-Carlo; HMC algorithm; fermions; improvement; masses; scale
Del Debbio, L., Giusti, L., Luescher, M., Petronzio, R., Tantalo, N. (2007). QCD with light Wilson quarks on fine lattices (I): first experiences and physics results. JOURNAL OF HIGH ENERGY PHYSICS(2) [10.1088/1126-6708/2007/02/056].
Del Debbio, L; Giusti, L; Luescher, M; Petronzio, R; Tantalo, N
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/33956
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