The ρ ±−ρ 0 mass splitting problem

1 v 2 5 J an 1 99 9 THE ρ ± − ρ 0 MASS SPLITTING PROBLEM

It is discussed the problem of the ρ ± − ρ 0 mass splitting. It is suggested to use the φ → ρπ → 3π decay to measure the ρ ± − ρ 0 mass splitting.

ar X iv : h ep - p h / 99 01 21 1 v 1 4 J an 1 99 9 THE ρ ± − ρ 0 MASS SPLITTING PROBLEM

It is discussed the problem of the ρ ± − ρ 0 mass splitting. It is suggested to use the φ → ρπ → 3π decay to measure the ρ ± − ρ 0 mass splitting.

Loop Contribution to ρ − ω Mixing and Mass Splitting

We study the self-energy amplitudes for the ρ − ω meson system produced by an effective field theory model at the quark level characterized by a finite range quark-quark interaction and an isospin breaking bare quark mass difference m u − m d. Dynamical effects associated with confinement and dressing of quarks and the finite size of the produced ¯ qq meson modes are treated. Parameters of this...

Subthreshold Ρ 0 Photoproduction

New Results in ρ 0 Meson Physics

We compare the predictions of a range of existing models based on the Vector Meson Dominance hypothesis with data on e+e− → π+π− and e+e− → μ+μ− Permanent address. Present address. cross-sections and the phase and near-threshold behavior of the timelike pion form factor, with the aim of determining which (if any) of these models is capable of providing an accurate representation of the full ran...