ar X iv : h ep - p h / 03 08 04 1 v 2 2 2 O ct 2 00 3 1 Measuring ψ ′ ′ → ρπ in e + e − experiment
نویسنده
چکیده
In Sand D-wave mixing scheme, the branching ratio of ψ′′ → ρπ is estimated. Together with the continuum cross section of ρπ estimated by form factor, the observed cross section of ρπ production at ψ′′ in ee experiment is calculated taking into account the interference effect between the resonance and continuum amplitudes and the initial state radiative correction. The behavior of the cross section reveals that the disappearance of ρπ signal just indicates the existence of the corresponding branching ratio Bψ′′→ρπ at the order of 10 .
منابع مشابه
ar X iv : h ep - p h / 03 08 04 1 v 1 5 A ug 2 00 3 1 Measuring ψ ′ ′ → ρπ in e + e − experiment
In Sand D-wave mixing scheme, the branching ratio of ψ′′ → ρπ is estimated. Together with the continuum cross section of ρπ estimated by form factor, the observed cross section of ρπ production at ψ′′ in ee experiment is calculated taking into account the interference effect between the resonance and continuum amplitudes and the initial state radiative correction. The behavior of the cross sect...
متن کاملar X iv : h ep - p h / 04 10 02 8 v 1 2 O ct 2 00 4 Universal phase between strong and EM interactions ∗
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متن کاملar X iv : h ep - p h / 04 10 02 8 v 2 2 2 O ct 2 00 4 Universal phase between strong and EM interactions ∗
It is shown that the experimental data of ψ and ψ are consistent with a −90◦ phase between the strong and eletromagnetic decay amplitudes. The ee → ρπ measured at ψ is also consistent with the branching ratio predicted by Rosner’s scenario on ρπ puzzle in charmonium physics. This scenario leads to a possible large charmless branching ratio in ψ decays. work in collaboration with C. Z. Yuan and ...
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متن کاملar X iv : h ep - e x / 02 10 06 3 v 2 2 7 Ju l 2 00 4 The Interference between Virtual Photon and 1 − − Charmonium in e + e − Experiment
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