"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 experiment s
measurement of a fundamental parameter of the theory and stands as
a benchmark against which subsequent analyses of this type will be
compared."
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