Preonic models and production of excited Z boson by e-e+ Z process

PREONIC MODELS AND PRODUCTION OF EXCITED Z BOSONBY e-e+→ Z γ PROCESS( M.Sc.Thesis )Erdoğan AKYAZIGAZİ UNIVERSITYINSTITUTE OF SCIENCE AND TECHNOLOGYSeptember 2006ABSTRACTThere are several fundamental problems which do not have solutions in theframework of the Standard Model. Some of them are; fermion?s mass andmixing pattern, L-R symmetry breaking, quark-lepton symmetry, very largenumbers of fundemental particles and arbitrary parameters etc. So, physicistspropose many different extensions of the Standard Model, most part of whichpredict a rich spectrum of new particles and interactions. Several examples are;Preonic Models, Supersymmetry, Extra-Dimensions. As in the history ofphysics, proposal a new level of substructure seems to be the right approach to anew physics. In this thesis, Preonic Models which assume that quarks, leptonsand gauge bosons have same constituents are considered. Finally, property andproduction of excited Z boson at CLIC electron-positron collider have beeninvestigated.Science Code : 202.1.149Key Words : Standard Model, Preonic Models, Exited Z bosonPage Number : 51Adviser : Prof. Dr. Saleh SULTANSOY