Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-04-18
Phys.Rev. D58 (1998) 074003
Physics
High Energy Physics
High Energy Physics - Phenomenology
33 pages, 4 figures
Scientific paper
10.1103/PhysRevD.58.074003
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 with heavy quark symmetry (HQS) and the heavy quark effective theory (HQET). Heavy mesons in this theory are constructed as composite particles of a heavy quark bounded with the light degrees of freedom. The heavy meson properties in the heavy quark limit and the $1/m_Q$ corrections can then be explicitly evaluated from this effective theory. All the basic parameters of the HQET, namely, the heavy quark mass $m_Q$, the heavy meson residual mass $\overline{\Lambda}$, and the HQS breaking mass parameters $\lambda_1$ and $\lambda_2$, are consistently determined. $\lambda_1$ 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.
Cheng Hai-Yang
Cheung Chi-Yee
Zhang Wei-Min
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