We compute the decay constants for the heavy--light pseudoscalar mesons in the quenched approximation and continuum limit of lattice QCD. Within the Schrodinger Functional framework, we make use of the step scaling method, which has been previously introduced in order to deal with the two scale problem represented by the coexistence of a light and a heavy quark. The continuum extrapolation gives us a value $f_{B_s} = 192(6)(4)$ MeV for the $B_s$ meson decay constant and $f_{D_s} = 240(5)(5)$ MeV for the $D_s$ meson.
DE DIVITIIS, G.m., Guagnelli, M., Palombi, F., Petronzio, R., Tantalo, N. (2003). Heavy light decay constants in the continuum limit of quenched lattice QCD. NUCLEAR PHYSICS. B, 672(1-2), 372-386 [10.1016/j.nuclphysb.2003.09.013].
Heavy light decay constants in the continuum limit of quenched lattice QCD
DE DIVITIIS, GIULIA MARIA;PETRONZIO, ROBERTO;TANTALO, NAZZARIO
2003-01-01
Abstract
We compute the decay constants for the heavy--light pseudoscalar mesons in the quenched approximation and continuum limit of lattice QCD. Within the Schrodinger Functional framework, we make use of the step scaling method, which has been previously introduced in order to deal with the two scale problem represented by the coexistence of a light and a heavy quark. The continuum extrapolation gives us a value $f_{B_s} = 192(6)(4)$ MeV for the $B_s$ meson decay constant and $f_{D_s} = 240(5)(5)$ MeV for the $D_s$ meson.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
