The role of σ - meson in ω → ππγ decays and the coupling constant g ωσγ
نویسندگان
چکیده
منابع مشابه
A consistent description of ρ 0 → ππγ decays including σ ( 500 ) meson effects
A consistent description of σ(500) meson effects in ρ0 → π0π0γ and π+π−γ decays is proposed in terms of reasonably simple amplitudes which reproduce the expected chiral-loop behaviour for large mσ values. For the neutral case, in addition to the well known ω exchange, there is an important contribution from the σ(500) meson that is in agreement with recent experimental data. For the charged cas...
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متن کاملar X iv : h ep - p h / 01 11 30 8 v 2 1 8 A pr 2 00 2 Chiral loops and VMD in the V → PPγ decays
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