Does J / ψ → π + π − fix the Electromagnetic Form Factor
نویسندگان
چکیده
منابع مشابه
A large final - state interaction in the 0 − 0 − decays of J / ψ
In view of important implications in the B decay, the 00 decay modes of J/ψ are analyzed with broken flavor SU(3) symmetry in search for longdistance final-state interactions. If we impose one mild theoretical constraint on the electromagnetic form factors, we find that a large phase difference of final-state interactions is strongly favored between the one-photon and the gluon decay amplitudes...
متن کاملV ub | from exclusive semi - leptonic B decays , with little theoretical uncertainty .
The Cabibbo-Kobayashi-Maskawa matrix element |Vub| can be extracted from the rate for the semileptonic decay B → πl−ν̄l, with little theoretical uncertainty, provided the hadronic form factor for the B → π transition can be measured from some other B decay. In here, we suggest using the decay B → πJ/ψ. This is a color suppressed decay, and it cannot be properly described within the usual factori...
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In this research the exclusive decay of is calculated by QCD factorization (QCDF) method and final state interaction (FSI). First, the decay is calculated via QCDF method. The result that is found by using the QCDF method is less than the experimental result. So FSI is considered to solve the decay. For this decay, via the exchange of mesons are chosen for the intermedi...
متن کاملYITP-99-65 Non-factorizable contributions in B decays ∗
First of all, ¯ B → Dπ and D * π decays are studied phenomenologically and possible lower bounds of the branching ratios, B(¯ B 0 → D 0 π 0) and B(¯ B 0 → D * 0 π 0), are estimated from existing experimental data on branching ratios for the ¯ B → Dπ and D * π decays. Then, ¯ B → Dπ, D * π, J/ψ ¯ K and J/ψπ decays are studied by decomposing their amplitude into a sum of factorizable and non-fact...
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تاریخ انتشار 1993