Measurement of CP parameters in B- → Dπ+π-π0K- and study of the X(3872) in B → J/ψπ+π-K with the BABAR detector

Abstract

This dissertation presents two analyses performed on data collected with the BABAR detector at the SLAC PEP-II e+e- asymmetric-energy B Factory. First, a Dalitz analysis is shown that performs the first measurement of CP violation parameters in the decay B- → Dπ+π-π0K- using the decay rate asymmetry and D0 - D-0 interference. The results can be used to further constrain the value of the CKM angle γ. The second analysis studies the properties of the X(3872) in neutral and charged B → J/ψπ+π-K decays. Measurements of the branching ratio and mass are presented as well as the search for additional resonances at higher masses.