Meson spectroscopy and decay constants with Wilson fermions at beta = 6.4
Abstract
A lattice study of the physical properties of mesons composed of a heavy, Q, and a light, q, quark, at beta = 6.4 in a 13,824 by 60 lattice is carried out. The Wilson action in the quenched approximation is used. The mass spectrum and the decay constants of vector and pseudoscalar mesons are studied. Violations of the mass scaling law f(sub P) square root of M(sup P) = constant are found. The results using quenched but propagating quarks are consistent with the static results when the scale is taken from the pion decay constant. Combining the results obtained by several calculations of the pseudoscalar decay constants as a function of the meson mass, at different values of the lattice spacing, f(sub B) square root of B(sub B) = (220 +/- 40) MeV is obtained. The vector pseudoscalar mass splittings do not follow the predicted behavior, which is expected in the limit of large heavy quark masses.
- Publication:
-
Unknown
- Pub Date:
- October 1991
- Bibcode:
- 1991msdc.book.....A
- Keywords:
-
- Energy Spectra;
- Mass Spectroscopy;
- Mesons;
- Particle Mass;
- Radioactive Decay;
- Decay Rates;
- High Energy Interactions;
- Lattices;
- Monte Carlo Method;
- Pion Beams;
- Quarks;
- Spectrum Analysis;
- Atomic and Molecular Physics