出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The masses and decay constants of pseudoscalar mesons D, Ds, and K are determined in quenched
lattice QCD with exact chiral symmetry. For 100 gauge configurations generated with singleplaquette
action at b = 6:1 on the 203£40 lattice, we compute point-to-point quark propagators
for 30 quark masses in the range 0:03 · mqa · 0:80, and measure the time-correlation functions
of pseudoscalar and vector mesons. The inverse lattice spacing a¡1 is determined with the experimental
input of fp , while the strange quark bare mass (msa = 0:08), and the charm quark bare
mass (mca = 0:80) are fixed such that the masses of the corresponding vector mesons are in good
agreement with f (1020) and J=y(3097) respectively. Our results of pseudoscalar-meson decay
constant are: fK = 152(6)(10) MeV, fD = 235(8)(14) MeV, and fDs = 266(10)(18) MeV [1].
The latest experimental result of fD+ from CLEO [3] is in good agreement with our prediction.
