Couplings of pions with heavy baryons from light-cone QCD sum rules in the leading order of HQET

Abstract

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).

Comments: Minor changes, typos corrected, final version to appear in Phys. Lett. B