DateThe final copy of this thesis has been examined by the signatories, and we find that both the content and the form meet acceptable presentation standards of scholarly work in the above mentioned discipline. Rare charmless hadronic B decays are particularly interesting because of their importance in understanding the CP violation, which is essential to explain the matterantimatter asymmetry in our universe, and of their roles in testing the "effective" theory of B physics. The study has been done with the BABAR experiment, which is mainly designed for the study of CP violation in the decays of neutral B mesons, and secondarily for rare processes that become accessible with the high luminosity of the PEP-II BFactory.In a sample of 89 million produced BB pairs on the BABAR experiment, we always what I could rely on when things looked pessimistic. It has been a great pleasure to work him and it is hard for me to imagine that one could have a better advisor than Bill. I would also like to thank Jim Smith for his helpful advice and guidance during all the stages of this project. Discussions with him were so fruitful that I could end up with nothing otherwise when the analysis went stalled many times. Whenever it looked the hardest time to me, Jim and Bill were there to help.It is a tremendous task requiring team effort for anyone to accomplish any achievement in this field, and I would like to thank Jean Roy for his early work on ωh + analysis;Mirna van Hoek for her great analysis tools, Q2BUser and Q2BFit; Paul Bloom for his insightful discussions and initial setup on ωK * and ωρ analysis; Fred Blanc for his invaluable help in different stages of the analysis. Thanks also to Phil, Corry, Keith, I have spent one year at SLAC, which turned out to be a very happy experience, and I could not leave without saying thanks to Vera Lüth, the leader of Group C which hosted me. I also need to thank the administrative and technical staff at SLAC, in her hometown, where she never left before, to come with me for my study. She gave me perpetual love, support and encouragement that helped to bring this project to its successful completion. Chapter 1 Theory
IntroductionPeople's desire to understand the structure of matter is never ending, and it is now well known that matter is built from molecules and atoms which in turn are in the next 50 years many new particles were discovered, mainly from cosmic rays.Particle physics came into a new era after the development of high energy accelerators and detectors, which provided intense and controlled beams and precise measurements of particles produced by collision. Modern experiments on particle physics are a challenge both to technology and human collaboration. In Chapter 2 we will describe one such particle physics experiment where this work has been done.This chapter serves as a short review of our current knowledge in particle physics most relevant to this work; for a general introduction to the subject of particle physics, see for example Ref. 9. A very important concept in phys...