OF THE UNIVERSITY OF MINNESOTA BY

There are many people to whom I should show my appreciation and gratitude. This dissertation is completed in the CLEO collaboration, where I learned and experienced a lot in experimental high energy physics. I would like to express my appreciations and gratitude to the people who helped me in various ways. First I would like to thank my thesis adviser, Ron Poling for his support over the years. His patience, insight and advice have provided me guidance through the process of selecting, designing and performing the analysis. His enthusiasm and passion for physics and way of cooperating with others certainly provide me a good model of a successful physicist. It was a great pleasure to work with him and have him as my adviser. Pete Zweber cooperate with me on the project that involved in this analysis. From him I have learned a lot of background knowledge about this analysis and general analysis strategies. Datao Gong provided a lot of guidance and advice at the beginning of this project. He shared with me his experience of the previous analysis that invoked the motivations of this project. He also provided great technical helps during the early period of this analysis. During the rst year I worked at Wilson Lab of Cornell University, my friend and colleague Selina Li helped me to know the hardware system, to get familiar with the collaboration, and to discuss analyses. I would also like to thank all other current and past CLEO colleagues who wor