[lucida] Sans serif math with lucida fonts?

[Mau V]

\documentclass[11pt]{beamer}
\usepackage[T1]{lucidabr}
\usefonttheme{professionalfonts}  %% ADDED

\begin{document}
  \begin{equation}
  \hat{}
  \end{equation}
\end{document}


No, if you try with an equation on display you get the equation number in CM font!! (well, that happens to me...)

Thanks,
M.V.