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U(2) Flavor Physics without U(2) Symmetry
Alfredo Aranda, Christopher D. Carone, Richard F. Lebed
We present a model of fermion masses based on a minimal, non-Abelian discrete symmetry that reproduces the Yukawa matrices usually associated with U(2) theories of flavor. Mass and…
Radiative Weak Annihilation Decays
Richard F. Lebed
A class of meson decay modes sensitive to only one quark topology at leading G_F order (annihilation of valence quarks through a W) is described. No experimental observations, nor…
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…
A Hexagonal Theory of Flavor
Christopher D. Carone, Richard F. Lebed
We construct a supersymmetric theory of flavor based on the discrete gauge group (D_6)^2, where D_6 describes the symmetry of a regular hexagon under proper rotations in three dime…
B^+ --> D^{*+}_s gamma and B^+ --> D^{*+} gamma as Probes of V_{ub}
Benjamin Grinstein, Richard F. Lebed
The decays B^+ --> D^{*+}_s gamma and B^+ --> D^{*+} gamma can be used for an extraction of |V_{ub}|. When the b and c quarks are nearly degenerate the rate for these modes can be…