The possible hidden-charm molecular baryons composed of anti-charmed   meson and charmed baryon
  With the one-boson-exchange model we have studied the possible existence of the very loosely bound hidden-charm molecular baryons composed of anti-charmed meson and charmed baryon. Our numerical results indicate that there exist $\Sigma_c\bar{D}^*$ states with $I(J^P)=1/2(1/2^-), 1/2(3/2^-), 3/2(1/2^-), 3/2(3/2^-)$ and $\Sigma_c\bar{D}$ state with $3/2(1/2^-)$. But the $\Lambda_c \bar{D}$ and $\Lambda_c \bar{D}^*$ molecular states do not exist. 
Zhong-Cheng Yang, Zhi-Feng Sun, Jun He, Xiang Liu and Shi-Lin Zhu
hep-ph hep-ex nucl-ex nucl-th