The matrix element which determines the B meson decay constant can be measured on the lattice using an effective field theory for heavy quarks. Various discretizations of the heavy-light bilinears which appear in this and other B decay matrix elements are possible. The heavy-light bilinear currently used for the determination of the B meson decay constant on the lattice suffers a substantial on...

We study the dispersion relations of mesons in a particular hot strongly coupled supersymmetric gauge theory plasma. We find that at large momentum k the dispersion relations become ω ≃ v0k + a + b/k + . . ., where the limiting velocity v0 is the same for mesons with any quantum numbers and depends only on the ratio of the temperature to the quark mass T/mq. We compute a and b in terms of the m...

These lectures are intended to provide an introduction to heavy meson decays and CP violation. The first lecture contains a brief review of the standard model and how the CKM matrix and CP violation arise, mixing and CP violation in neutral meson systems, and explanation of the cleanliness of the sin 2β measurement. The second lecture deals with the heavy quark limit, some applications of heavy...

A Comment on the Experimental Determination of |V ts /V td | 2. Abstract We propose a method to extract the ratio |V ts /V td | 2 from a measurement of ∆Γ/Γ for the B s meson. This method is experimentally more sensitive than the conventional method for large values of |V ts | but depends on the accuracy of parton level calculations. The measurement of the mixing parameter x s = ∆m/Γ for the B ...