A Search for Rare Decay D0 --> mu+mu - High Energy Physics UPRM

to work on their experiment. To all those people who work at EPSCoR but most of all toSandra Troche who was always there for me.To the great friendships I made in PR. To Juan Carlos Hernández, Carlos José andspecially to their parents José “Machito” Hernández and Juanita González. You were thefamily I needed throughtout these three years.Thanks to Mr. Joe Ortíz for helping me in my college studies, thank you for helpingme pursue the grounds of PR. I also thank Mr. Félix Rivera, and the Romero Valle familyas well as Valle Miranda family. Thanks for everything. I thank Mr. Rafael Sanjuan andhis family for being there when I needed it. A special thanks to Mrs. Martha Castaño, mayGod bless your noble soul.I thank my professors at the Universidad del Atlántico - Barranquilla: ArnaldoCohen and Oswaldo Dede, for making me look at science. To my colleagues and friendsArnulfo Barrios, Oscar Montesinos, Harkccynn Torregroza, Ericka Navarro and RafaelManga. I also thank my High School teachers from the Bienestar Social de la Policía- Barranquilla: Blas Tórres, Carlos Bray and Orlando Ortíz, specially Mr. ArmandoConsuegra (Barrabás).To all of these whom I have mentioned as well as those whom I have not, otherwiseI would never be able to finish...Mil y mil gracias!!!vii