Document Details Document Type : Thesis  Document Title : MASS SPECTRUM OF HEAVY-QUARK HADRONS طيف كتلة الهادرونات ثقيلة الكواركات   Subject : Physics  Document Language : Arabic  Abstract : The spectrum of the upsilon meson system comprises bound states of a bottom quark and an anti-bottom quark called bottomonium. Upsilon is a massive meson of mass about 9.46 GeV. It was discovered by resonance peaks produced at certain energies in experiments involving the production of lepton pairs. The higher energy peaks are the excited states of . In this work, we calculate the mass spectrum of this system, using Dirac equation, which is a relativistic wave equation, and holds good for spin 1/2 particles. This equation is solved with two suitable models for the interaction potential between the constituent quarks of system using the WKB method. We developed a computer program to obtain the energy eigenvalues for different values of quantum number and for n = 0, 1, 2 and 3. Comparison of our results with experimental values shows good agreement especially for  Supervisor : Dr. Mohammed Riyadh Arafah  Thesis Type : Master Thesis  Publishing Year : 1426 AH 2005 AD  Added Date : Wednesday, June 11, 2008  Researchers Researcher Name (Arabic) Researcher Name (English) Researcher Type Dr Grade Email عفاف سالم باعبدالله BaAbdullah, Afaf Salem Researcher Master   Files File Name Type Description  23874.pdf pdf المستخلص  23875.pdf pdf Abstract Back To Researches Page