QCD interactions of heavy mesons with pions by light-cone sum rules

Abstract

Light-cone QCD sum rules are employed to compute the strong coupling constants: \(g_{B^* B^* \pi}\), \(g_{B_1 B_0 \pi}\) and \(g_{B_1 B^* \pi}\), where \((B,B^*)\) and \((B_0,B_1)\) are negative and positive parity \((0^-,1^-)\) and \((0^+,1^+)\)\(\bar q Q\) doublets. The couplings are calculated both for finite values of the heavy quark mass and in the infinite heavy quark mass limit, deriving sum rules for \(m_Q \to \infty\).