How to properly format equation symbols
I can reproduce your picture with
\documentclass{amsart}
\usepackage{mathptmx}
\begin{document}
\begin{equation}
\hat{\mathcal{H}}_{rr}=B^{(e)}\hat{J}^{2}
\end{equation}
\end{document}
The problem is in mathptmx
, which is a poor 30 year old hack for getting Times in math papers.
Use a more modern package.
\documentclass{amsart}
\usepackage{newtxtext,newtxmath}
\usepackage{calrsfs}
\begin{document}
\begin{equation}
\hat{\mathcal{H}}_{rr}=B^{(e)}\hat{J}^{2}
\end{equation}
\end{document}
With rsfso
instead of calrsfs
:
\documentclass{amsart}
\usepackage{newtxtext,newtxmath}
\usepackage{rsfso}
\begin{document}
\begin{equation}
\hat{\mathcal{H}}_{rr}=B^{(e)}\hat{J}^{\,2}
\end{equation}
\end{document}
Add some kerning before the exponent. Also, for capital letters, I would use the \widehat
command from mathabx
. As it is already defined in amssymb
, I defined a \varwidehat
accent borrowed from mathabx:
\documentclass{amsart}
\usepackage{ieeetrantools}
\DeclareFontFamily{U}{mathx}{\hyphenchar\font45}
\DeclareFontShape{U}{mathx}{m}{n}{
<5> <6> <7> <8> <9> <10>
<10.95> <12> <14.4> <17.28> <20.74> <24.88>
mathx10
}{}
\DeclareSymbolFont{mathx}{U}{mathx}{m}{n}
\DeclareFontSubstitution{U}{mathx}{m}{n}
\DeclareMathAccent{\varwidehat}{0}{mathx}{"70}
\begin{document}
\begin{IEEEeqnarray}{rCl}
\label{eq:48}
\varwidehat{\mathcal{H}}_{rr}=B^{(e)}\varwidehat{J}^{\mkern2mu 2}
\end{IEEEeqnarray}
\end{document}