Possibility of $\Sigma_{c}(2800)$ and $\Lambda_{c}(2940)^{+}$ as   $S$-wave $D^{(*)}N$ molecular states
  In this talk, we give a brief review of our work studying the possibility of $\Sigma_{c}(2800)$ and $\Lambda_{c}(2940)^{+}$ as $S$-wave $D^{(*)}N$ molecular states from QCD sum rules. 
Jian-Rong Zhang
hep-ph hep-ex