Heavy Meson Masses and Decay Constants

Abstract

Masses and decay constants of mesons containing a single $c$ or $b$ quark are described within the framework of heavy-quark symmetry. The $B_s^{\ast }-B_s$ and ${\bar{B}}^{\ast 0}-{\bar{B}}^0$ mass splittings are found equal to within a fraction of an MeV. Decay constants of $D$ and $B$ mesons are estimated using isospin mass splittings in the $D$, $D^{\ast }$, $B$, and $B^{\ast }$ states to isolate the electromagnetic hyperfine interaction between quarks. A relation following from the use of splittings in kaons is also considered.

Comments: Presented at DPF 92 Meeting, Fermilab, November, 1992. 4 pages, LaTeX (one PostScript figure available upon request)