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 (Σ^*, Σ) and g_3(Σ^*, Λ) 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).

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

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