Couplings of pions with heavy baryons from light-cone QCD sum rules in   the leading order of HQET
  The couplings of pions with heavy baryons g_2 (\Sigma^*, \Sigma) and g_3(\Sigma^*, \Lambda) are studied with light-cone QCD sum rules in the leading order of heavy quark effective theory. Both sum rules are stable. Our results are g_2=(1.56\pm 0.3), g_3=(0.94\pm 0.06). 
Shi-Lin Zhu and Yuan-Ben Dai