Measurements Of The X C And X B Quarkonium States In Pp Collisions With The Atlas Experiment (springer Theses)

This thesis, which won one of the six 2015 ATLAS Thesis Awards, concerns the study of the charmonium and bottomonium bound heavy quark bound states. The first section of the thesis describes the observation of a candidate for the chi\_b(3P) bottomonium states. This represented the first observation of a new particle at the LHC and its existence was subsequently confirmed by D0 and LHCb experiments. The second part of the thesis presents measurements of the prompt and non-prompt production of the chi\_c1 and chi\_c2 charmonium states in proton-proton collisions. These measurements are compared to several theoretical predictions and can be used to inform the development of theoretical models of quarkonium production. Front Matter....Pages i-xvi Introduction and Theoretical Foundations....Pages 1-7 Quarkonium....Pages 9-38 The ATLAS Experiment....Pages 39-55 Analysis Techniques....Pages 57-77 Observation of the \({\chi }_{{b}}\) Bottomonium States....Pages 79-106 Measurement of the Production of the \({\chi }_{{c1}}\) and \({\chi }_{{c2}}\) Charmonium States....Pages 107-172 Conclusion....Pages 173-174 Back Matter....Pages 175-183