Treatment Of Some High And Low Energy Hadronic Transitions In The Framework Of Bethe-salpeter Dynamical Programme For A Composite Hadron

In this thesis we employ Bethe Salpeter Equation(BSE) under Covariant Instanta-rnneous Ansatz(CIA) to calculate: (A) The cross section of double Charmonium pro-rnduction from electron-positron annihilation at the CM energy 10:6GeV through thernprocess e++eÀ€€ ! J= + c, which has recently been observed at B factories and whosernmeasurements were done by Babar and Belle groups. (B) The decay width for the ra-rndiative decay of equal mass vector mesons through the process h ! h0 + rn(h=vectorrnmeson, h'=pseudoscalar meson and rn=the emitted photon.) (C) Decay width forrnstrong decay of excited vector mesons through the process h ! h0 + h"(h=excitedrnvector meson, h'=vector meson and h"=pseudoscalar meson.) The calculated resultsrnare in reasonable agreement with data

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