abbrv.sty

% correct abbreviations http://stackoverflow.com/a/3285603
\RequirePackage{expl3}

\ExplSyntaxOn{}
\newcommand\latinabbrev[1]{
  \peek_meaning:NTF . {% Same as \@ifnextchar
    #1\@}%
  { \peek_catcode:NTF a {% Check whether next char has same catcode as \'a, i.e., is a letter
      #1.\@ }%
    {#1.\@}}}
\ExplSyntaxOff{}

\def\aka/{\latinabbrev{a.\,k.\,a}}
\def\cf/{\latinabbrev{cf}}
\def\Cf/{\latinabbrev{Cf}}
\def\st/{\latinabbrev{s.\,t}}
\def\St/{\latinabbrev{S.\,t}}
\def\eg/{\latinabbrev{e.\,g}}
\def\Eg/{\latinabbrev{E.\,g}}
\def\etal/{\latinabbrev{\textit{et\,al}}}
\def\etc/{\latinabbrev{etc}}
\def\Etc/{\latinabbrev{Etc}}
\def\ie/{\latinabbrev{i.\,e}}
\def\Ie/{\latinabbrev{I.\,e}}
\def\resp/{\latinabbrev{resp}}
\def\Resp/{\latinabbrev{Resp}}

\RequirePackage[nolist,nohyperlinks]{acronym}
%\newcommand{\abbrv}[1]{%
%    \csdef{#1}{\ac{##1}}%
%    \csdef{#1l}{\acl{##1}}%
%}
\begin{acronym}
\acro{ME}{Modelo Estándar}
\acro{SM}{Standard Model}
\acro{BSM}{Beyond the Standard Model}
\end{acronym}