We develop a perturbative QCD factorization theorem which is compatible with effective field theory. The factorization involves three scales: an infrared cutoff of order ΛQCD, a hard scale of order the B meson mass, and an ultraviolet cutoff of order the W boson mass. Our approach is renormalization group invariant and moderates the scale-dependence problem in effective field theory. Applying t...

An analysis of the baryon-baryon potential from the point of view of large-N c QCD is performed. A comparison is made between the N c-scaling behavior directly obtained from an analysis at the quark-gluon level to the N c-scaling of the potential for a generic hadronic field theory in which it arises via meson exchanges and for which the parameters of the theory are given by their canonical lar...

The decay of the ω meson in a heat bath of thermally excited pions is studied within the framework of real-time thermal field theory using an appropriate effective Lagrangian. We show that the ω meson spectrum broadens considerably at temperatures T > 100 MeV, primarily because of ωπ → ππ reactions in the thermal environment.

The decays of the ω meson in a heat bath of thermally excited pions is studied within the framework of real-time thermal field theory using an appropriate effective Lagrangian. We show that the ω meson spectrum broadens considerably at temperatures T > 100 MeV, primarily because of ωπ → ππ reactions in the thermal environment.

I briefly present recent work on QCD power corrections in heavy-to-light meson decays, using an effective field theory approach.

Chiral effective lagrangians may differ in their prediction of meson-nucleon scattering amplitudes off-meson-mass-shell, but must yield identical S-matrix elements. We argue that the effective meson mass in nuclear matter obtained from chiral effective lagrangians is also unique. Off-mass-shell amplitudes obtained using the PCAC choice of pion field must therefore not be viewed as fundamental c...

Applications of effective field theory to nucleon-nucleon scattering, quarkonia decay and production and B meson decay are discussed. Some unresolved issues are considered.

Applications of effective field theory to nucleon-nucleon scattering, quarkonia decay and production and B meson decay are discussed. Some unresolved issues are considered.