出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：This is a follow-up to our earlier work for the energies and the charge (vector) and matter (scalar)
distributions for S-wave states in a heavy-light meson, where the heavy quark is static and the
light quark has a mass about that of the strange quark. We study the radial distributions of higher
angular momentum states, namely P- and D-wave states, using a "fuzzy" static quark. A new
improvement is the use of hypercubic blocking in the time direction, which effectively constrains
the heavy quark to move within a 2a hypercube (a is the lattice spacing).
The calculation is carried out with dynamical fermions on a 163 32 lattice with a 0:10 fm
generated using the non-perturbatively improved clover action. The congurations were generated
by the UKQCD Collaboration using lattice action parameters b = 5:2, cSW = 2:0171 and
k = 0:1350.
In nature the closest equivalent of this heavy-light system is the Bs meson. Attempts are now
being made to understand these results in terms of the Dirac equation.
