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Light hadrons from lattice QCD with light (u, d), strange and charm dynamical quarks

AutorGiménez Gómez, Vicente ; Baron, R.; Boucaud, Ph.; Carbonell, J.; Deuzeman, A.; Drach, V.; Farchioni, F.; Herdoiza, Gregorio ; Jansen, K.; McNeile, C.; Michael, C.; Montvay, I.; Palao, David ; Pallante, Elisabetta; Pène, O.; Reker, S.; Urbach, C.; Wagner, M.; Wenger, U.; ETM collaboration
Palabras claveLattice QCD
Lattice gauge theory
Light hadrons
Charm quark
Chiral perturbation theory
Chiral Lagrangians
Fecha de publicaciónjun-2010
EditorSpringer
CitaciónJournal of High Energy Physics 5 (111): 1-31 (2010)
ResumenWe present results of lattice QCD simulations with mass-degenerate up and down and mass-split strange and charm (N_f = 2+1+1) dynamical quarks using Wilson twisted mass fermions at maximal twist. The tuning of the strange and charm quark masses is performed at two values of the lattice spacing a~0.078 fm and a~0.086 fm with lattice sizes ranging from L~1.9 fm to L~2.8 fm. We measure with high statistical precision the light pseudoscalar mass m_PS and decay constant f_PS in a range 270 < m_PS < 510 MeV and determine the low energy parameters f_0, l_3 and l_4 of SU(2) chiral perturbation theory. We use the two values of the lattice spacing, several lattice sizes as well as different values of the light, strange and charm quark masses to explore the systematic effects. A first study of discretisation effects in light-quark observables and a comparison to N_f=2 results are performed.
Versión del editorhttp://dx.doi.org/10.1007/JHEP06(2010)111
URIhttp://hdl.handle.net/10261/26613
DOI10.1007/JHEP06(2010)111
ISSN1126-6708
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