  The theory of heavy meson masses, in which the symmetries of heavy and light
quarks are exploited, can be used to describe the low energy interaction among
heavy mesons to a better extent. The spin-flavor symmetry leads to many
interesting relations between the properties of hadrons containing a heavy
quark. The most direct consequences concern the spectroscopy of such states. We
use such symmetries to explore some of the states of B-meson and predictions
are found to be in agreement with the experimental data.
