Effective field theory of heavy mesons

In this paper we present a detailed formulation for a recently proposed effective field theory to describe the nonperturbative QCD dynamics of heavy mesons. This effective theory incorporates heavy quark symmetry (HQS) and heavy quark effective theory (HQET). Heavy mesons in this theory are constructed as composite particles of a heavy quark bounded with light degrees of freedom. The heavy meson properties in the heavy quark limit and the (Formula presented) corrections can then be explicitly evaluated from this effective theory. All the basic parameters of HQET, namely, the heavy quark mass (Formula presented) the heavy meson residual mass (Formula presented) and the HQS breaking mass parameters (Formula presented) and (Formula presented) are consistently determined. (Formula presented) is found to be small due to a large cancellation between the heavy quark kinetic energy and the chromo-electric interaction between the heavy quark and light degrees of freedom. We also evaluate the Isgur-Wise function, the decay constant, and the axial-vector coupling constant of heavy mesons.