We identify a new cosmological problem for models which solve the strong CP puzzle with
an invisible axion, unrelated to the domain wall problem. Because the axion is very weakly …

When one or more quarks are heavy compared to hadronic scales, some new symmetries
appear in the low energy effective lagrangian for QCD. We exploit these static quark …

We present an extension of our earlier observations on symmetries in operation in the weak
decays of heavy mesons containing a single heavy quark. The new symmetries allow us to …

We propose a mechanism for stabilizing the size of the extra dimension in the Randall-Sundrum
scenario. The potential for the modulus field that sets the size of the fifth dimension is …

We predict the matrix elements and resulting electron spectra for semileptonic meson decays
using the quark potential model. Particular attention is paid to the high-energy electron end-…

We consider cosmologies having an inflationary period during which the Robertson-Walker
scale factor is an arbitrary function of time satisfying R ̈ > 0 (not necessarily an exponential)…

We discuss the motivation for considering models of particle physics based on 0=1 supergravity.
Analysis of the scalar potential for such models suggests a minimal low energy sector. …

We discuss the problem of constructing a model in which supersymmetry is unbroken down
to low energies. It is suggested that the scalar partners of quarks and leptons may get their …

… to second order in the 1/mb expansion. Most of the 1/mb corrections have a simple physical
… There is a subtlety in the use of the equations of motion at order 1/mb in the heavy quark …

An effective Lagrangian that describes the low-momentum interactions of mesons containing
a heavy quark with the pseudo Goldstone bosons π, K, and η is constructed. It is invariant …