5 papers
On Radiative Weak Annihilation Decays
Richard F. Lebed
We discuss a little-studied class of weak decay modes sensitive to only one quark topology at leading order in G_F: M --> m gamma, where M,m are mesons with completely distinct fla…
QCD Constraints on Form Factor Shapes
Richard F. Lebed
This talk presents an introduction to the use of dispersion relations to constrain the shapes of hadronic form factors consistent with QCD. The applications described include metho…
NN Interactions in QCD: Old and New Techniques
Richard F. Lebed
Since QCD is believed to be the underlying theory of the strong interaction, it is appropriate to study techniques that take into account more features of its rich and complex stru…
Explicit Quark-Hadron Duality in 1+1 Dimensions
Richard F. Lebed
Explicit quark-hadron duality in the limit of heavy quark mass is studied using the 't Hooft model, where both partonic and hadronic amplitudes may be computed exactly. Results for…
Model-Independent Determinations of B -> D l nu , D* l nu Form Factors
C. Glenn Boyd, Benjamin Grinstein, Richard F. Lebed
We present nonperturbative, model-independent parametrizations of the individual QCD form factors relevant to B -> D* l nu and B -> D l nu decays. These results follow from dispers…