Masses, branching ratios, and full widths of heavy ρ′, ρ″ and ω′, ω″ resonances

0 On the masses , branching ratios , and full widths of heavy ρ ′ , ρ ′ ′ and ω ′ , ω ′ ′ resonances

On the masses, branching ratios, and full widths of heavy ρ ′, ρ and ω

0 ω − ρ Mixing and the ω → ππγ Decay

We reexamine the ω → π0 π0 γ decay, adding the effect of ω−ρ mixing to the amplitude calculated with the aid of chiral perturbation theory and vector meson dominance. We predict the neutral decay to occur with a width of Γ(ω → π0 π0 γ ) = (390 ± 96)eV and also analyze the effect of the ω − ρ mixing on the Γ(ω → π0 π0 γ )/Γ(ω → π+ π γ ) ratio. Several remarks on the effect of ω − ρ mixing on cer...

Implication of the B → ( ρ , ω ) γ Branching Ratios for the CKM Phenomenology

We study the implication of the recent measurement by the BELLE collaboration of the averaged branching fraction B̄exp[B → (ρ, ω) γ] = (1.8 −0.5 ± 0.1)× 10 for the CKM phenomenology. Combined with the averaged branching fraction B̄exp(B → K γ) = (4.06±0.26)×10−5 measured earlier, this yields R̄exp[(ρ, ω) γ/Kγ] = (4.2±1.3)% for the ratio of the two branching fractions. Updating earlier theoretical ...

ρ-ω mixing effects in relativistic heavy-ion collisions

We show that even moderate excess of neutrons over protons in nuclear matter, such as in Pb, can lead to large ρ-ω mixing at densities of the order of twice the nuclear saturation density and higher. The typical mixing angle is of the order of 10. The mixing may result in noticeable shifts of the positions and widths of resonances. We also analyze temperature effects and find that temperatures ...