Matter induced ϱ - ω mixing
نویسندگان
چکیده
منابع مشابه
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...
متن کامل00 4 ρ − ω splitting and mixing in nuclear matter S . Zschocke , B . Kämpfer
Starting from a complete operator product expansion up to mass dimension-6 twist4 and up to first order in the coupling constants we investigate the splitting and mixing of ρ and ω mesons in isospin symmetric nuclear matter. Special attention is devoted to the impact of the scalar 4-quark condensates on both effects. In nuclear matter the Landau damping governs the ρ−ω mass splitting while the ...
متن کامل00 4 ρ − ω splitting and mixing in nuclear matter S . Zschocke ,
Starting from a complete operator product expansion up to mass dimension-6 twist4 and up to first order in the coupling constants we investigate the splitting and mixing of ρ and ω mesons in isospin symmetric nuclear matter. Special attention is devoted to the impact of the scalar 4-quark condensates on both effects. In nuclear matter the Landau damping governs the ρ−ω mass splitting while the ...
متن کاملLoop 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...
متن کاملThe Okamoto-Nolen-Schiffer anomaly without ρ-ω mixing
We examine the effect of isospin-violating meson-nucleon coupling constants and of π-η mixing on the binding-energy differences of mirror nuclei in a model that possesses no contribution from ρ-ω mixing. The 3He-3H bindingenergy difference is computed in a nonrelativistic approach using a realistic wave function. We find the 3He-3H binding-energy difference very sensitive to the short-distance ...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1997
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(97)00270-0