The analytical studies of mass spectrum and decay rates of ground and excited states of charmonium and bottomonium in the framework of Bethe-Salpetr equation gives a detail information and understanding of the internal structure of hadrons! The main emphasis in this book was to show that the problem of 4X4 BSE under heavy-quark approximation can indeed be handled analytically for both masses as well as the wave functions in an approximate harmonic oscillator basis.

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DE 22848 Norderstedt

Hluf Negash Gebrehiwet is an assistant Professor of Physics at Samara University, Ethiopia. He received his BED award from Haramaya University and his M.Sc. and PhD awards from Addis Ababa University, Ethiopia, between 2004 and 2016. His specialization of field is Quantum Field Theory.