Searching for New Physics in b → sℓ+ℓ− Transitions at the LHCb Experiment

Description

This thesis presents two analyses of semileptonic b → sl+l− decays using Flavour Changing Neutral Currents (FCNCs) to test for the presence of new physics and lepton flavour universality, and the equality of couplings for different leptons, which on the basis of experimental evidence is assumed to hold in the Standard Model, free from uncertainties as a result of knowledge of the hadronic matrix elements. It also includes the angular analysis of Lambda_b->Lambda mumu decay and the RK* measurement, both of which are first measurements, not yet performed by any other experiment. Front Matter ....Pages i-xvi Introduction (Luca Pescatore)....Pages 1-21 The LHCb Detector at the Large Hadron Collider (Luca Pescatore)....Pages 23-43 Differential Branching Fraction of \(\varLambda ^0_b \rightarrow \varLambda \mu ^+\mu ^- \) (Luca Pescatore)....Pages 45-83 Angular Analysis of \({\varLambda }^{0}_{{b} } \rightarrow \varLambda {\mu }^{+}{\mu }^{-} \) Decays (Luca Pescatore)....Pages 85-104 Testing Lepton Flavour Universality with \({\mathcal R}_{{K} ^{*0}} \) (Luca Pescatore)....Pages 105-157 Conclusions (Luca Pescatore)....Pages 159-161 Back Matter ....Pages 163-200