Wellenpaket

$\Psi \left({\underline {x}},t\right)={{\left(2\pi \right)}^{-{}^{d}\!\!\diagup \!\!{}_{2}\;}}\int {\varphi \left({\underline {k}}\right){{e}^{-\omega \left({\underline {k}}\right)t+{\underline {k}}.{\underline {x}}}}{{d}^{d}}{\underline {k}}}$ d Raumdimension

Failed to parse (unknown function "\raise"): {\displaystyle \omega \left( \underline{k} \right)=\sqrt{{{{\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{k}}}^{2}}+{{m}^{2}}}}