BOTTOM, CHARMED MESONS ($\mathit B$ = $\mathit C$ = $\pm{}$1)

${{\mathit B}_{{c}}^{+}}$ = ${\mathit {\mathit c}}$ ${\mathit {\overline{\mathit b}}}$, ${{\mathit B}_{{c}}^{-}}$ = ${\mathit {\overline{\mathit c}}}$ ${\mathit {\mathit b}}$,
similarly for ${{\mathit B}_{{c}}^{*}}$'s
Review:
Developments in Heavy Quarkonium Spectroscopy
${{\mathit B}_{{c}}^{+}}$
${{\mathit B}_{{c}}{(2S)}^{\pm}}$