ar X iv : h ep - p h / 01 06 21 1 v 1 1 9 Ju n 20 01 Interference effects in the decay φ → π 0 π 0 γ and the coupling constant g

ar X iv : h ep - p h / 01 01 02 4 v 1 3 J an 2 00 1 Interference pattern analysis in the decays φ → γπη and φ → γπ 0 π 0

Interference pattern analysis in the decays φ → γπη and φ → γπ 0 π 0. Abstract We analyse the interference patterns in the reactions φ → (γa 0 + π 0 ρ) → γπη and φ → (γf 0 +π 0 ρ) → γπ 0 π 0. Taking into account the interference, we fit the experimental data and show that the background reaction does not distort the π 0 η spectrum in the decay φ → γπη everywhere over the energy region and does ...

ar X iv : h ep - p h / 01 06 14 7 v 1 1 4 Ju n 20 01 T - odd correlation in the K l 3 γ - decay

The dependence of the K + → π 0 l + ν l γ decay width on the T-odd kinematical variable, ξ = q · [ p l × p π ]/M 3 , is studied at the tree and one-loop levels of Standard Model. It is shown that at the tree level this decay width is the even function of ξ, while the odd contribution arises due to the electromagnetic final state interaction. This contribution is determined by imaginary parts of...

ar X iv : h ep - p h / 01 06 14 7 v 2 1 5 Ju n 20 01 T - odd correlation in the K l 3 γ - decay

The dependence of the K + → π 0 l + ν l γ decay width on the T-odd kinematical variable, ξ = q · [ p l × p π ]/M 3 , is studied at the tree and one-loop levels of Standard Model. It is shown that at the tree level this decay width is the even function of ξ, while the odd contribution arises due to the electromagnetic final state interaction. This contribution is determined by imaginary parts of...

ar X iv : h ep - p h / 02 05 01 6 v 1 2 M ay 2 00 2 Scalar a 0 ( 980 ) meson in φ → π 0 ηγ decay

ar X iv : h ep - p h / 99 09 20 4 v 3 2 9 Ju n 20 01 Study of N ∗ ( 1440 ) from J / Ψ Decays

For J/Ψ → ¯ ppπ 0 and ¯ ppπ + π − , the π 0 p and pπ + π − systems are limited to be pure isospin 1/2 due to isospin conservation. This is a big advantage in studying N * resonances from J/Ψ decays, compared with πN and γN experiments. The process J/Ψ → ¯ pN * or p ¯ N * provides a new way to probe the internal structure of the N * resonances. Here we report a quark model calculation for J/Ψ → ...