Light hadron spectroscopy on the lattice with the non-perturbatively improved Wilson action

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dc.creatorBecirevic, D.
dc.creatorBoucaud, Ph.
dc.creatorGiusti, L.
dc.creatorLeroy, J. P.
dc.creatorLubicz, V.
dc.creatorMartinelli, G.
dc.creatorMescia, F.
dc.creatorRapuano, F.
dc.date1998-09-16
dc.date.accessioned2026-07-07T03:40:08Z
dc.date.available2026-07-07T03:40:08Z
dc.descriptionWe present results for the light meson masses and decay constants as obtained from calculations with the non-perturbatively improved (`Alpha') action and operators on a 24^3 \times 64 lattice at beta = 6.2, in the quenched approximation. The analysis was performed in a way consistent with O(a) improvement. We obtained: reasonable agreement with experiment for the hyperfine splitting; f_K=156(17) MeV, f_pi =139(22) MeV, f_K/f_pi = 1.13(4) ; f_{K*}=219(7) MeV, f_rho =199(15) MeV, f_phi =235(4) MeV; f_{K*}^{T}(2 GeV) = 178(10) MeV, f_rho^{T}(2 GeV) =165(11) MeV, where f_V^{T} is the coupling of the tensor current to the vector mesons; the chiral condensate <\bar{q}q>^\bar{MS} (2 GeV)= - (253 +/- 25 MeV)^3. Our results are compared to those obtained with the unimproved Wilson action. We also verified that the free-boson lattice dispersion relation describes our results very accurately for a large range of momenta.
dc.description29 pages (LaTeX), 14 Postscript figures
dc.identifierhttps://arxiv.org/abs/hep-lat/9809129
dc.identifierhttp://arxiv.org/abs/hep-lat/9809129
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/39165
dc.subjectHigh Energy Physics - Lattice
dc.subjectHigh Energy Physics - Phenomenology
dc.titleLight hadron spectroscopy on the lattice with the non-perturbatively improved Wilson action
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