Photon Physics at the LHC

Photon Physics at the LHC

Author: Michael Hance

Publisher: Springer Science & Business Media

Published: 2012-11-08

Total Pages: 152

ISBN-13: 3642330622

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This thesis reports on the first studies of Standard Model photon production at the Large Hadron Collider (LHC) using the ATLAS detector. Standard Model photon production is a large background in the search for Higgs bosons decaying into photon pairs, and is thus critical to understand. The thesis explains the techniques used to reconstruct and identify photon candidates using the ATLAS detector, and describes a measurement of the production cross section for isolated prompt photons. The thesis also describes a search for the Higgs boson in which the analysis techniques used in the measurement are exploited to reduce and estimate non-prompt backgrounds in diphoton events.


Measurements of the X c and X b Quarkonium States in pp Collisions with the ATLAS Experiment

Measurements of the X c and X b Quarkonium States in pp Collisions with the ATLAS Experiment

Author: Andrew Chisholm

Publisher: Springer

Published: 2015-09-14

Total Pages: 193

ISBN-13: 3319231200

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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.


Measurement of the Inclusive Jet Cross Section with the ATLAS Detector at the Large Hadron Collider

Measurement of the Inclusive Jet Cross Section with the ATLAS Detector at the Large Hadron Collider

Author: Caterina Doglioni

Publisher: Springer Science & Business Media

Published: 2012-07-28

Total Pages: 167

ISBN-13: 3642305385

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Tests of the current understanding of physics at the highest energies achievable in man-made experiments are performed at CERN’s Large Hadron Collider. In the theory of the strong force within the Standard Model of particle physics - Quantum ChromoDynamics or QCD - confined quarks and gluons from the proton-proton scattering manifest themselves as groups of collimated particles. These particles are clustered into physically measurable objects called hadronic jets. As jets are widely produced at hadron colliders, they are the key physics objects for an early "rediscovery of QCD". This thesis presents the first jet measurement from the ATLAS Collaboration at the LHC and confronts the experimental challenges of precision measurements. Inclusive jet cross section data are then used to improve the knowledge of the momentum distribution of quarks and gluons within the proton and of the magnitude of the strong force.


Study of Double Parton Scattering in Photon + 3 Jets Final State

Study of Double Parton Scattering in Photon + 3 Jets Final State

Author: You-Hao Chang

Publisher: Springer

Published: 2017-01-20

Total Pages: 107

ISBN-13: 9811038244

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This book mainly focuses on the study of photon + 3 jets final state in Proton-Proton Collisions at √s = 7TeV, searching for patterns of two (or more) distinct hard scatterings in the same collision, i.e the so-called Double Parton Scattering (DPS). A new method by using Monte Carlo generators was performed and provides higher order corrections to the description of the Single Parton Scattering (SPS) background. Further it is investigated whether additional contributions from DPS can improve the agreement between the measured data and the Monte Carlo predictions. The current theoretical uncertainties related to the SPS background are found to be larger than expectation. At the same time a rich set of DPS-sensitive measurements is reported for possible further interpretation.


Issues in General Physics Research: 2011 Edition

Issues in General Physics Research: 2011 Edition

Author:

Publisher: ScholarlyEditions

Published: 2012-01-09

Total Pages: 8864

ISBN-13: 1464963282

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Issues in General Physics Research / 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about General Physics Research. The editors have built Issues in General Physics Research: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about General Physics Research in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in General Physics Research: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.


The Black Book of Quantum Chromodynamics — A Primer for the LHC Era

The Black Book of Quantum Chromodynamics — A Primer for the LHC Era

Author: John Campbell

Publisher: Oxford University Press

Published: 2018-01-19

Total Pages: 761

ISBN-13: 0191014990

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The Black Book of Quantum Chromodynamics is an in-depth introduction to the particle physics of current and future experiments at particle accelerators. The book offers the reader an overview of practically all aspects of the strong interaction necessary to understand and appreciate modern particle phenomenology at the energy frontier. It assumes a working knowledge of quantum field theory at the level of introductory textbooks used for advanced undergraduate or in standard postgraduate lectures. The book expands this knowledge with an intuitive understanding of relevant physical concepts, an introduction to modern techniques, and their application to the phenomenology of the strong interaction at the highest energies. Aimed at graduate students and researchers, it also serves as a comprehensive reference for LHC experimenters and theorists. This book offers an exhaustive presentation of the technologies developed and used by practitioners in the field of fixed-order perturbation theory and an overview of results relevant for the ongoing research programme at the LHC. It includes an in-depth description of various analytic resummation techniques, which form the basis for our understanding of the QCD radiation pattern and how strong production processes manifest themselves in data, and a concise discussion of numerical resummation through parton showers, which form the basis of event generators for the simulation of LHC physics, and their matching and merging with fixed-order matrix elements. It also gives a detailed presentation of the physics behind the parton distribution functions, which are a necessary ingredient for every calculation relevant for physics at hadron colliders such as the LHC, and an introduction to non-perturbative aspects of the strong interaction, including inclusive observables such as total and elastic cross sections, and non-trivial effects such as multiple parton interactions and hadronization. The book concludes with a useful overview contextualising data from previous experiments such as the Tevatron and the Run I of the LHC which have shaped our understanding of QCD at hadron colliders.


Particle Physics At The Tercentenary Of Mikhail Lomonosov - Proceeding Of The Fifteenth Lomonosov Conference On Elementary Particle Physics

Particle Physics At The Tercentenary Of Mikhail Lomonosov - Proceeding Of The Fifteenth Lomonosov Conference On Elementary Particle Physics

Author: Alexander I Studenikin

Publisher: World Scientific

Published: 2012-11-27

Total Pages: 481

ISBN-13: 9814436844

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This volume is devoted to a wide variety of investigations, both in theory and experiment, of particle physics such as electroweak theory, fundamental symmetries, tests of the Standard Model and beyond, neutrino and astroparticle physics, heavy quark physics, non-perturbative QCD, quantum gravity effects, and present and future accelerator physics.


Particle Physics at the Tercentenary of Mikhail Lomonosov

Particle Physics at the Tercentenary of Mikhail Lomonosov

Author: Moskovskiĭ gosudarstvennyĭ universitet im. M.V. Lomonosova

Publisher: World Scientific

Published: 2013

Total Pages: 481

ISBN-13: 9814436828

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This volume is devoted to a wide variety of investigations, both in theory and experiment, of particle physics such as electroweak theory, fundamental symmetries, tests of the Standard Model and beyond, neutrino and astroparticle physics, heavy quark physics, non-perturbative QCD, quantum gravity effects, and present and future accelerator physics.