Trying to get the correct letter l lowercase

Question

I would like to get the $l(g)$ of the left side, but using

\mathcal{}

I get the right side:

Please, what package can I use?

Thanks in advance!

Answer 1

It's l with a script (handwriting) shape. You needn't to invoke any package.

\documentclass{article}
\begin{document}
$\ell(g)$
\end{document}