ar X iv : h ep - p h / 02 04 18 1 v 2 2 3 A pr 2 00 2 ELECTROWEAK MATRIX ELEMENTS AT LARGE N C : MATCHING QUARKS TO MESONS

ar X iv : h ep - p h / 02 04 18 1 v 1 1 6 A pr 2 00 2 ELECTROWEAK MATRIX ELEMENTS AT LARGE N C : MATCHING QUARKS TO MESONS

I review some progress made on the problem of calculating electroweak processes of mesons at low energy with the use of an approximation to large-Nc QCD which we call the Minimal Hadronic Approximation.

ar X iv : h ep - p h / 02 03 04 2 v 2 4 A pr 2 00 2 Once more on mixing of the a 0 ( 980 ) and f 0 ( 980 ) mesons

ar X iv : h ep - p h / 02 11 38 2 v 3 2 8 A pr 2 00 3 Gold - plated Mode of CP - Violation in Decays of Ξ bc Baryons

The model-independent method based on the triangle ideology is implemented to extract the CKM-matrix angle γ in the decays of doubly heavy baryons containing the charmed and beauty quarks. We analyze a color structure of diagrams and conditions to reconstruct two reference-triangles by tagging the flavor and CP eigenstates of D 0 ↔ ¯ D 0 mesons in the fixed exclusive channels. The characteristi...

ar X iv : h ep - p h / 02 11 38 2 v 2 1 7 M ar 2 00 3 Gold - plated Mode of CP - Violation in Decays of Ξ bc Baryons

The model-independent method based on the triangle ideology is implemented to extract the CKM-matrix angle γ in the decays of doubly heavy baryons containing the charmed and beauty quarks. We analyze a color structure of diagrams and conditions to reconstruct two reference-triangles by tagging the flavor and CP eigenstates of D 0 ↔ ¯ D 0 mesons in the fixed exclusive channels. The characteristi...

ar X iv : h ep - p h / 04 04 24 5 v 1 2 7 A pr 2 00 4 CLNS

The cross sections for several γγ → V V processes exhibit strong enhancements near threshold, where V denotes a vector meson. The pattern of these enhancements is not well understood; for example, γγ → ρρ shows an appreciable peak, while γγ → ρρ does not. Some possible mechanisms for this behavior are discussed. Tests are proposed involving production of systems containing heavier quarks, e.g.,...