New Era For Cp Asymmetries: Axions And Rare Decays Of Hadrons And Leptons

New Era For Cp Asymmetries: Axions And Rare Decays Of Hadrons And Leptons
Author: Ikaros I Bigi
Publisher: World Scientific
Total Pages: 354
Release: 2021-07-14
Genre: Science
ISBN: 9813233095
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This book is dedicated to Lev Okun, who passed away in November 2015. He was a true pioneer in probing fundamental dynamics.The book has two objectives. First is to showcase Okun's impact for decades since 1963, when he published his remarkable book Weak Interaction of Elementary Particles. Second is to present the current progress of our scientific community in the studies of our Universe. New directions and possible future developments are discussed, often using the past as a guide. The authors mostly focus on CP asymmetries in the transitions of hadrons and leptons, but they also discuss their rare decays, and talk about axions and supersymmetry, and possible connections with dark matter, extra dimensions, baryogenesis and multiverse.This book is suitable for readers who know quantum mechanics and quantum field theories in general.

Spin Correlations in tt Events from pp Collisions

Spin Correlations in tt Events from pp Collisions
Author: Boris Lemmer
Publisher: Springer
Total Pages: 246
Release: 2015-06-24
Genre: Science
ISBN: 3319189328
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This thesis introduces readers to the Standard Model, the top quark and its properties, before explaining the concept of spin correlation measurement. The first measurement of top quark spin correlations at the LHC in the lepton+jets decay channel is presented. As the heaviest elementary particle, the top quark plays an essential role in the Standard Model of elementary particle physics. In the case of top quarks being produced in pairs at hadron colliders, the Standard Model predicts their spins to be correlated. The degree of correlation depends on both the production mechanism and properties of the top quark. Any deviation from the Standard Model prediction can be an indicator for new physics phenomena. The thesis employs an advanced top quark reconstruction algorithm including dedicated identification of the up- and down-type quarks from the W boson decay.