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QCD Radiation in Top-Antitop and Z+Jets Final States: Precision Measurements at ATLAS: Springer Theses

Autor Kiran Joshi
en Limba Engleză Hardback – 25 iun 2015
This thesis contains new research in both experimental and theoretical particle physics, making important contributions in each. Two analyses of collision data from the ATLAS experiment at the LHC are presented, as well as two phenomenological studies of heavy coloured resonances that could be produced at the LHC. The first data analysis was the measurement of top quark-antiquark production with a veto on additional jet activity. As the first detector-corrected measurement of jet activity in top-antitop events it played an important role in constraining the theoretical modelling, and ultimately reduced these uncertainties for ATLAS's other top-quark measurements by a factor of two. The second data analysis was the measurement of Z+2jet production and the observation of the electroweak vector boson fusion (VBF) component. As the first observation of VBF at a hadron collider, this measurement demonstrated new techniques to reliably extract VBF processes and paved the way for future VBF Higgs measurements. The first phenomenological study developed a new technique for identifying the colour of heavy resonances produced in proton-proton collisions. As a by-product of this study an unexpected and previously unnoticed correlation was discovered between the probability of correctly identifying a high-energy top and the colour structure of the event it was produced in. The second phenomenological study explored this relationship in more detail, and could have important consequences for the identification of new particles that decay to top quarks.
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Specificații

ISBN-13: 9783319196527
ISBN-10: 3319196529
Pagini: 247
Ilustrații: XVI, 178 p. 97 illus., 63 illus. in color.
Dimensiuni: 155 x 235 x 17 mm
Greutate: 0.45 kg
Ediția:2015
Editura: Springer International Publishing
Colecția Springer
Seria Springer Theses

Locul publicării:Cham, Switzerland

Public țintă

Research

Cuprins

Introduction.- The Standard Model.- Experimental Apparatus.- Reconstructing Physics Objects.- Event-Filter Muon Isolation.- Jet Vetoing in Top-Antitop Events.- Studies and Applications of Jet Vetoing in Boosted Topologies.- Measurements of Electroweak Z Boson + Dijet Production.- Conclusions.

Notă biografică

Kiran Joshi received his PhD in particle physics from the University of Manchester, where he worked on the ATLAS experiment at the LHC. For this he received the John G Rutherglen memorial prize for outstanding work in experimental High Energy Physics.
He currently works as a Research Scientist at The Christie NHS Foundation Trust, Manchester, UK.

Textul de pe ultima copertă

This thesis contains new research in both experimental and theoretical particle physics, making important contributions in each. Two analyses of collision data from the ATLAS experiment at the LHC are presented, as well as two phenomenological studies of heavy coloured resonances that could be produced at the LHC. The first data analysis was the measurement of top quark-antiquark production with a veto on additional jet activity. As the first detector-corrected measurement of jet activity in top-antitop events it played an important role in constraining the theoretical modelling, and ultimately reduced these uncertainties for ATLAS's other top-quark measurements by a factor of two. The second data analysis was the measurement of Z+2jet production and the observation of the electroweak vector boson fusion (VBF) component. As the first observation of VBF at a hadron collider, this measurement demonstrated new techniques to reliably extract VBF processes and paved the way for future VBF Higgs measurements. The first phenomenological study developed a new technique for identifying the colour of heavy resonances produced in proton-proton collisions. As a by-product of this study an unexpected and previously unnoticed correlation was discovered between the probability of correctly identifying a high-energy top and the colour structure of the event it was produced in. The second phenomenological study explored this relationship in more detail, and could have important consequences for the identification of new particles that decay to top quarks.

Caracteristici

Nominated as an outstanding Ph.D. thesis by the University of Manchester, UK Documents the first detector-corrected measurement of jet activity in top-antitop events at the LHC Documents the first observation of vector boson fusion at a hadron collider Contains phenomenological studies showing the important link between experiment and theory Includes supplementary material: sn.pub/extras