Physics with Electrons in the ATLAS Detector
Physics with Electrons in the ATLAS Detector

Author: Kurt Brendlinger

Publisher: Springer

Published: 2018-01-30

Total Pages: 261

ISBN-13: 3319739301

DOWNLOAD EBOOK

This thesis presents two production cross-section measurements of pairs of massive bosons using final states with leptons, made with the ATLAS detector at the Large Hadron Collider. The first measurement, performed using data collected in 2012 at center-of-mass energy √ s = 8 TeV, is the first fiducial and differential cross-section measurement of the production of the Higgs Boson when it decays to four charged leptons (electrons or muons). The second measurement is the first fiducial and inclusive production cross-section measurement of WZ pairs at center-of-mass energy √ s = 13 TeV using final states with three charged leptons. A significant portion of the thesis focuses on the methods used to identify electrons from massive boson decay—important for many flagship measurements—and on assessing the efficiency of these particle identification techniques. The chapter discussing the WZ pair cross-section measurement provides a detailed example of an estimate of lepton background in the context of an analysis with three leptons in the final state.

Particle Physics Reference Library
Particle Physics Reference Library

Author: Christian W. Fabjan

Publisher: Springer Nature

Published: 2020

Total Pages: 1083

ISBN-13: 3030353184

DOWNLOAD EBOOK

This second open access volume of the handbook series deals with detectors, large experimental facilities and data handling, both for accelerator and non-accelerator based experiments. It also covers applications in medicine and life sciences. A joint CERN-Springer initiative, the "Particle Physics Reference Library" provides revised and updated contributions based on previously published material in the well-known Landolt-Boernstein series on particle physics, accelerators and detectors (volumes 21A, B1,B2,C), which took stock of the field approximately one decade ago. Central to this new initiative is publication under full open access

A Search for Displaced Leptons in the ATLAS Detector
A Search for Displaced Leptons in the ATLAS Detector

Author: Lesya Horyn

Publisher: Springer Nature

Published: 2022-02-07

Total Pages: 146

ISBN-13: 3030916723

DOWNLOAD EBOOK

This thesis presents a search for long-lived particles decaying into displaced electrons and/or muons with large impact parameters. This signature provides unique sensitivity to the production of theoretical lepton-partners, sleptons. These particles are a feature of supersymmetric theories, which seek to address unanswered questions in nature. The signature searched for in this thesis is difficult to identify, and in fact, this is the first time it has been probed at the Large Hadron Collider (LHC). It covers a long-standing gap in coverage of possible new physics signatures. This thesis describes the special reconstruction and identification algorithms used to select leptons with large impact parameters and the details of the background estimation. The results are consistent with background, so limits on slepton masses and lifetimes in this model are calculated at 95% CL, drastically improving on the previous best limits from the Large Electron Positron Collider (LEP).

The Search and Discovery of the Higgs Boson
The Search and Discovery of the Higgs Boson

Author: Luis Roberto Flores Castillo

Publisher: Morgan & Claypool Publishers

Published: 2016-01-01

Total Pages: 104

ISBN-13: 1681741423

DOWNLOAD EBOOK

This book provides a general description of the search for and discovery of the Higgs boson (particle) at CERN’s Large Hadron Collider. The goal is to provide a relatively brief overview of the issues, instruments and techniques relevant for this search; written by a physicist who was directly involved. The Higgs boson mat be the one particle that was studied the most before its discovery and the story from postulation in 1964 to detection in 2012 is a fascinating one. The story is told here while detailing the fundamentals of particle physics.

The Large Hadron Collider
The Large Hadron Collider

Author: Lyndon R. Evans

Publisher: EPFL Press

Published: 2009-01-01

Total Pages: 264

ISBN-13: 9782940222346

DOWNLOAD EBOOK

Describes the technology and engineering of the Large Hadron collider (LHC), one of the greatest scientific marvels of this young 21st century. This book traces the feat of its construction, written by the head scientists involved, placed into the context of the scientific goals and principles.

Particle Detectors
Particle Detectors

Author: Hermann Kolanoski

Publisher: Oxford University Press

Published: 2020-06-30

Total Pages: 949

ISBN-13: 0191899232

DOWNLOAD EBOOK

This book describes the fundamentals of particle detectors as well as their applications. Detector development is an important part of nuclear, particle and astroparticle physics, and through its applications in radiation imaging, it paves the way for advancements in the biomedical and materials sciences. Knowledge in detector physics is one of the required skills of an experimental physicist in these fields. The breadth of knowledge required for detector development comprises many areas of physics and technology, starting from interactions of particles with matter, gas- and solid-state physics, over charge transport and signal development, to elements of microelectronics. The book's aim is to describe the fundamentals of detectors and their different variants and implementations as clearly as possible and as deeply as needed for a thorough understanding. While this comprehensive opus contains all the materials taught in experimental particle physics lectures or modules addressing detector physics at the Master's level, it also goes well beyond these basic requirements. This is an essential text for students who want to deepen their knowledge in this field. It is also a highly useful guide for lecturers and scientists looking for a starting point for detector development work.

Standard Model Measurements with the ATLAS Detector
Standard Model Measurements with the ATLAS Detector

Author: Jana Nováková

Publisher: Springer Science & Business Media

Published: 2013-08-30

Total Pages: 100

ISBN-13: 3319008102

DOWNLOAD EBOOK

This thesis deals with two main procedures performed with the ATLAS detector at the Large Hadron Collider (LHC). The noise description in the hadronic calorimeter TileCal represents a very valuable technical job. The second part presents a fruitful physics analysis - the cross section measurement of the process p+p → Z0 → τ + τ. The Monte Carlo simulations of the TileCal are described in the first part of the thesis, including a detailed treatment of the electronic noise and multiple interactions (so-called pile-up). An accurate description of both is crucial for the reconstruction of e.g. jets or hadronic tau-jets. The second part reports a Standard Model measurement of the Z0 → τ + τ process with the emphasis on the final state with an electron and a hadronically decaying tau-lepton. The Z0 → τ + τ channel forms the dominant background in the search for Higgs bosons decaying into tau lepton pairs, and thus the good understanding achieved here can facilitate more sensitive Higgs detection.

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

DOWNLOAD EBOOK

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.

Astroparticle, Particle And Space Physics, Detectors And Medical Physics Applications - Proceedings Of The 11th Conference On Icatpp-11
Astroparticle, Particle And Space Physics, Detectors And Medical Physics Applications - Proceedings Of The 11th Conference On Icatpp-11

Author: Pier-giorgio Rancoita

Publisher: World Scientific

Published: 2010-04-30

Total Pages: 950

ISBN-13: 9814464856

DOWNLOAD EBOOK

The exploration of the subnuclear world is done through increasingly complex experiments covering a wide range of energy and performed in a large variety of environments from particle accelerators, underground detectors to satellites and space laboratory. The achievement of these research programs calls for novel techniques, new materials and instrumentation to be used in detectors, often of large scale. Therefore, fundamental physics is at the forefront of technological advance and also leads to many applications. Among these, medical applications have a particular importance due to health and social benefits they bring to the public.