Observation Of Cp Violation In B Dk Decays (springer Theses)
by Paolo Gandini /
2013 / English / PDF
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CP violation is a well-established phenomenon in particle physics, but until 2001 it was only observed in kaons. In the last decade, several matter-antimatter asymmetries have been observed in neutral B mesons in line with the expectations of the Standard Model of the weak interaction. Direct CP violation is also expected in the decay rates of charged B+ mesons versus that of B- mesons, though the greatest effects are present in a decay that occurs just twice in 10 million decays. Such rarity requires huge samples to study and this is exactly what the LHC, and its dedicated B-physics experiment LHCb provide.This thesispresents ananalysis of the first two years of LHCb data.The authordescribes the first observation of the rare decay, B- DK-, D -K+ and the first observation of direct CP violation in this B decay. The workconstitutes essential information on the experiments measurement of a fundamental parameter of the theory and stands as a benchmark against which subsequent analyses of this type will be compared.
