Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
1998-09-16
Physics
High Energy Physics
High Energy Physics - Lattice
29 pages (LaTeX), 14 Postscript figures
Scientific paper
We 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.
Becirevic Damir
Boucaud Ph.
Giusti Leonardo
Leroy J.-P.
Lubicz Vittorio
No associations
LandOfFree
Light hadron spectroscopy on the lattice with the non-perturbatively improved Wilson action does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Light hadron spectroscopy on the lattice with the non-perturbatively improved Wilson action, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light hadron spectroscopy on the lattice with the non-perturbatively improved Wilson action will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-423162