771 citations · 5.1k across the 130 of their papers we have counts for
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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…
Counting Form Factors of Twist-Two Operators
Xiangdong Ji, Richard F. Lebed
We present a simple method to count the number of hadronic form factors based on the partial wave formalism and crossing symmetry. In particular, we show that the number of indepen…
A Lot of Flavor Physics from a Little Symmetry
Alfredo Aranda, Christopher D. Carone, Richard F. Lebed
Recent neutrino parameter measurements place increasingly stringent constraints on acceptable supersymmetric theories of flavor. A very fruitful approach is the application of non-…
Precision Studies of Duality in the 't Hooft Model
Richard F. Lebed, Nikolai G. Uraltsev
We address numerical aspects of local quark-hadron duality using the example of the exactly solvable 't Hooft model, two-dimensional QCD with N_c --> infinity. The primary focus of…
Naturalness of the Coleman-Glashow Mass Relation in the 1/N_c Expansion: an Update
Elizabeth Jenkins, Richard F. Lebed
A new measurement of the Xi^0 mass verifies the accuracy of the Coleman-Glashow relation at the level predicted by the 1/N_c expansion. Values for other baryon isospin mass splitti…
Maximal Neutrino Mixing from a Minimal Flavor Symmetry
Alfredo Aranda, Christopher D. Carone, Richard F. Lebed
We study a number of models, based on a non-Abelian discrete group, that successfully reproduce the simple and predictive Yukawa textures usually associated with U(2) theories of f…
Large N_c, Constituent Quarks, and N, Delta Charge Radii
Alfons J. Buchmann, Richard F. Lebed
We show how one may define baryon constituent quarks in a rigorous manner, given physical assumptions that hold in the large-N_c limit of QCD. This constituent picture gives rise t…