Time-Dependent CP Violation Measurements

This thesis describes a high-quality, high-precision method for the data analysis of an interesting elementary particle reaction. The data was collected at the Japanese B-meson factory KEKB with the Belle detector, one of the most successful large-scale experiments worldwide. CP violation is a subtle quantum effect that makes the world look different when simultaneously left and right and matter and antimatter are exchanged. This being a prerequisite for our own world to have developed from the big bang, there are only a few experimental indications of such effects, and their detection requires very intricate techniques. The discovery of CP violation in B meson decays garnered Kobayashi and Maskawa, who had predicted these findings as early as 1973, the 2008 Nobel prize in physics. This thesis describes in great detail what are by far the best measurements of branching ratios and CP violation parameters in two special reactions with two charm mesons in the final state. It presents an in-depth but accessible overview of the theory, phenomenology, experimental setup, data collection, Monte Carlo simulations, (blind) statistical data analysis, and systematic uncertainty studies.

Nominated as an outstanding Ph.D. thesis by the Karlsruhe Institute of Technology, Germany

Theoretical Foundations.- The Belle Experiment.- Analysis Methods.- Reconstruction and Selection.- Branching Fraction Measurements.- Time-Dependent Measurements.

This book offers a comprehensive introduction to the field of flavor physics and CP violating phenomena. It provides a detailed reference work on and explanatory examples of time-dependent measurements in particle physics.