Electroweak Physics At The Large Hadron Collider With The Atlas Detector

Author : Elodie Resseguie
Publisher : Springer Nature
Page : 336 pages
File Size : 41,7 Mb
Release : 2020-11-03
Category : Science
ISBN : 9783030570163

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Electroweak Physics at the Large Hadron Collider with the ATLAS Detector by Elodie Resseguie Pdf

This thesis discusses searches for electroweakly produced supersymmetric partners of the gauge and the Higgs bosons (gauginos and higgsinos) decaying to multiple leptons, using pp collisions at sqrt(s) = 13 TeV. The thesis presents an in-depth study of multiple searches, as well as the first 13 TeV cross section measurement for the dominant background in these searches, WZ production. Two searches were performed using 36.1/fb of data: the gaugino search, which makes use of a novel kinematic variable, and the higgsino search, which produced the first higgsino limits at the LHC. A search using 139/fb of data makes use of a new technique developed in this thesis to cross check an excess of data above the background expectation in a search using a Recursive Jigsaw Reconstruction technique. None of the searches showed a significant excess of data, and limits were expanded with respect to previous results. These searches will benefit from the addition of luminosity during HL-LHC; however, the current detector will not be able to withstand the increase in radiation. Electronics for the detector upgrade are tested and irradiated to ensure their performance.

Author : Matthias U. Mozer
Publisher : Springer
Page : 115 pages
File Size : 41,6 Mb
Release : 2016-03-24
Category : Science
ISBN : 9783319303819

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Electroweak Physics at the LHC by Matthias U. Mozer Pdf

The book discusses the recent experimental results obtained at the LHC that involve electroweak bosons. The results are placed into an appropriate theoretical and historical context. The work pays special attention to the rising subject of hadronically decaying bosons with high boosts, documenting the state-of-the-art identification techniques and highlighting typical results. The text is not limited to electroweak physics in the strict sense, but also discusses the use of electroweak vector-bosons as tool in the study of other subjects in particle physics, such as determinations of the proton structure or the search for new exotic particles. The book is particularly well suited for graduate students, starting their thesis work on topics that involve electroweak bosons, as the book provides a comprehensive description of phenomena observable at current accelerators as well as a summary of the most relevant experimental techniques.

Author : Peter Jenni,Fridolin Dittus
Publisher : World Scientific
Page : 372 pages
File Size : 44,6 Mb
Release : 2019-05-21
Category : Science
ISBN : 9789813271814

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Atlas: A 25-year Insider Story Of The Lhc Experiment by Peter Jenni,Fridolin Dittus Pdf

This book is written by the ATLAS Collaboration at CERN's Large Hadron Collider (LHC), to document and reflect on its more than 25 years of history. It covers all aspects of this global science project at the forefront of particle physics. The historical part recalls first the early stages of discussions in the community leading to the formation of the collaboration in 1992. In a unique approach, the second part documents the evolution from early detector concepts to the final instrument, covering the technical, financial and human aspects. This includes the phases of construction of detector components in the various institutes around the world as well as their installation and commissioning in the underground cavern at CERN.An important part is devoted to the operation of the whole experiment. The book highlights the capabilities and physics accomplishments so far, including the Higgs boson discovery (jointly announced with CMS). It features the various aspects of a broad spectrum of activities needed to arrive at the physics results. The book includes also an outlook to the detector upgrade activities preparing the experiment for the high-luminosity LHC phase of the next decades. Last but not least, it reveals the human aspects of the large ATLAS community working together pursuing common physics goals.The book is aimed at a broad readership with interest in large science projects and their history, as well as in the human endeavour of a worldwide collaboration.

Author : Josh McFayden
Publisher : Springer
Page : 190 pages
File Size : 55,7 Mb
Release : 2014-06-06
Category : Science
ISBN : 9783319071916

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Third generation SUSY and t ̄t +Z production by Josh McFayden Pdf

This thesis describes searches for new particles predicted by the super symmetry (SUSY) theory, a theory extending beyond the current Standard Model of particle physics, using the ATLAS detector at the CERN Large Hadron Collider. The thesis focuses on searches for stop and sbottom squarks, the SUSY partners of the top and bottom quarks, which are expected to be lighter than the partners of the first and second generation quarks and therefore good candidates for the first evidence of SUSY. It describes novel techniques for estimating and rejecting the Standard-Model backgrounds to searches for these particles. It also includes an independent analysis seeking to constrain the Standard Model ttZ background process, which also represents the first ATLAS search for this rare process at the LHC. The stop squark analysis described, with substantial leading contributions from the author, is the first search for these particles at the LHC to use the jets plus missing transverse energy plus 0-lepton signature and provides the world's best limits on the stop mass for light neutralino LSPs. All in all, the thesis describes three different world-leading analyses in both Standard Model and SUSY physics and therefore represents a major contribution to the field.

Author : Anonim
Publisher : Unknown
Page : 128 pages
File Size : 43,7 Mb
Release : 2024-06-28
Category : Electronic
ISBN : 9789814467513

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At the Leading Edge by Anonim Pdf

Author : Lesya Horyn
Publisher : Springer Nature
Page : 146 pages
File Size : 51,9 Mb
Release : 2022-02-07
Category : Science
ISBN : 9783030916725

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A Search for Displaced Leptons in the ATLAS Detector by Lesya Horyn Pdf

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).

Author : Arno Straessner
Publisher : Springer
Page : 222 pages
File Size : 41,8 Mb
Release : 2010-03-14
Category : Science
ISBN : 9783642051692

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Electroweak Physics at LEP and LHC by Arno Straessner Pdf

During more than 10 years, from 1989 until 2000, the LEP accelerator and the four LEP experiments, ALEPH, DELPHI, L3 and OPAL, have taken data for a large amount of measurements at the frontier of particle physics. The main outcome is a thorough and successful test of the Standard Model of electroweak interactions. Mass and width of the Z and W bosons were measured precisely, as well as the Z and photon couplings to fermions and the couplings among gauge bosons. The rst part of this work will describe the most important physics results of the LEP experiments. Emphasis is put on the properties of the W boson, which was my main research eld at LEP. Especially the precise determination of its mass and its couplings to the other gauge bosons will be described. Details on physics effects like Colour Reconnection and Bose-Einstein Correlations in W-pair events shall be discussed as well. A conclusive summary of the current electroweak measurements, including low-energy results, as the pillars of possible future ndings will be given. The important contributions from Tevatron, like the measurement of the top quark and W mass, will round up the present day picture of electroweak particle physics. This is an open access book.

Author : Thomas Schörner-Sadenius
Publisher : Springer
Page : 532 pages
File Size : 53,7 Mb
Release : 2015-05-15
Category : Science
ISBN : 9783319150017

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The Large Hadron Collider by Thomas Schörner-Sadenius Pdf

This comprehensive volume summarizes and structures the multitude of results obtained at the LHC in its first running period and draws the grand picture of today’s physics at a hadron collider. Topics covered are Standard Model measurements, Higgs and top-quark physics, flavour physics, heavy-ion physics, and searches for supersymmetry and other extensions of the Standard Model. Emphasis is placed on overview and presentation of the lessons learned. Chapters on detectors and the LHC machine and a thorough outlook into the future complement the book. The individual chapters are written by teams of expert authors working at the forefront of LHC research.

Author : Giuliano Gustavino
Publisher : Springer
Page : 236 pages
File Size : 55,5 Mb
Release : 2017-06-19
Category : Science
ISBN : 9783319588711

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Search for New Physics in Mono-jet Final States in pp Collisions by Giuliano Gustavino Pdf

This thesis provides a detailed and comprehensive description of the search for New Physics at the Large Hadron Collider (LHC) in the mono-jet final state, using the first 3.2 fb-1 of data collected at the centre of mass energy of colliding protons of 13~TeV recorded in the ATLAS experiment at LHC. The results are interpreted as limits in different theoretical contexts such as compressed supersymmetric models, theories that foresee extra-spatial dimensions and in the dark matter scenario. In the latter the limits are then compared with those obtained by other ATLAS analyses and by experiments based on completely different experimental techniques, highlighting the role of the mono-jet results in the context of dark matter searches.Lastly, a set of possible analysis improvements are proposed to reduce the main uncertainties that affect the signal region and to increase the discovery potential by further exploiting the information on the final state.

Author : G. L. Kane,Aaron Pierce
Publisher : World Scientific
Page : 352 pages
File Size : 48,9 Mb
Release : 2008
Category : Science
ISBN : 9789812779762

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Perspectives on Lhc Physics by G. L. Kane,Aaron Pierce Pdf

The Large Hadron Collider (LHC), located at CERN, Geneva, Switzerland, is the world's largest and highest energy and highest intensity particle accelerator. Here is a timely book with several perspectives on the hoped-for discoveries from the LHC.This book provides an overview on the techniques that will be crucial for finding new physics at the LHC, as well as perspectives on the importance and implications of the discoveries. Among the accomplished contributors to this book are leaders and visionaries in the field of particle physics beyond the Standard Model, including two Nobel Laureates (Steven Weinberg and Frank Wilczek), and presumably some future Nobel Laureates, plus top younger theorists and experimenters. With its blend of popular and technical contents, the book will have wide appeal, not only to physical scientists but also to those in related fields.

Author : Don Lincoln
Publisher : Johns Hopkins University Press
Page : 238 pages
File Size : 44,5 Mb
Release : 2020-09-29
Category : Science
ISBN : 9781421439143

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The Large Hadron Collider by Don Lincoln Pdf

As accessible as it is fascinating, The Large Hadron Collider reveals the inner workings of this masterful achievement of technology, along with the mind-blowing discoveries that will keep it at the center of the scientific frontier for the foreseeable future.

Author : Aleandro Nisati,Vivek Sharma
Publisher : World Scientific
Page : 128 pages
File Size : 45,5 Mb
Release : 2016-08-26
Category : Science
ISBN : 9789814425469

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Discovery of the Higgs Boson by Aleandro Nisati,Vivek Sharma Pdf

The recent observation of the Higgs boson has been hailed as the scientific discovery of the century and led to the 2013 Nobel Prize in physics. This book describes the detailed science behind the decades-long search for this elusive particle at the Large Electron Positron Collider at CERN and at the Tevatron at Fermilab and its subsequent discovery and characterization at the Large Hadron Collider at CERN. Written by physicists who played leading roles in this epic search and discovery, this book is an authoritative and pedagogical exposition of the portrait of the Higgs boson that has emerged from a large number of experimental measurements. As the first of its kind, this book should be of interest to graduate students and researchers in particle physics.

Author : Stefano Manzoni
Publisher : Springer
Page : 265 pages
File Size : 51,7 Mb
Release : 2019-08-02
Category : Science
ISBN : 9783030243708

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Physics with Photons Using the ATLAS Run 2 Data by Stefano Manzoni Pdf

The work presented in this book is based on the proton-proton collision data from the Large Hadron Collider at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector in 2015 and 2016. The research program of the ATLAS experiment includes the precise measurement of the parameters of the Standard Model, and the search for signals of physics beyond the SM. Both these approaches are pursued in this thesis, which presents two different analyses: the measurement of the Higgs boson mass in the di-photon decay channel, and the search for production of supersymmetric particles (gluinos, squarks or winos) in a final state containing two photons and missing transverse momentum. Finally, ATLAS detector performance studies, which are key ingredients for the two analyses outlined before, are also carried out and described.

Author : Michael Hauschild
Publisher : Springer Nature
Page : 43 pages
File Size : 41,7 Mb
Release : 2022-02-01
Category : Science
ISBN : 9783658332938

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Exploring the Large Hadron Collider - the Detectors by Michael Hauschild Pdf

Michael Hauschild takes the reader of this essential back to September 2008 to the bumpy start of the Large Hadron Collider LHC, the world's largest particle accelerator and today's world machine at CERN, the European Organization for Nuclear Research near Geneva, Switzerland; one of the most fascinating research centers of all. The author explains how the initial ideas led to the creation of the large collaborations at the LHC, alliances of up to 3,000 physicists. It is these collaborations that use huge particle detectors to measure the collisions at the LHC, hoping to discover new particles. After a stop of more than two years, the LHC was put back into operation in the spring of 2015 to discover the secrets of nature at higher energy than ever before. The Author Dr. Michael Hauschild is a particle physicist at CERN in Geneva and has been a member of the ATLAS experiment at the Large Hadron Collider LHC since 2005. During the first long measurement period of the LHC from 2010 to 2012, he witnessed the discovery of the Higgs particle in summer 2012. This Springer essential is a translation of the original German 1st edition essentials, Neustart des LHC: die Detektoren by Michael Hauschild, published by Springer Fachmedien Wiesbaden GmbH, part of Springer Nature in 2018. The translation was done with the help of artificial intelligence (machine translation by the service DeepL.com). A subsequent human revision was done primarily in terms of content, so that the book will read stylistically differently from a conventional translation. Springer Nature works continuously to further the development of tools for the production of books and on the related technologies to support the authors.

Author : Campanelli Mario
Publisher : World Scientific
Page : 112 pages
File Size : 54,9 Mb
Release : 2015-09-16
Category : Science
ISBN : 9789814656672

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Inside Cern's Large Hadron Collider: From The Proton To The Higgs Boson by Campanelli Mario Pdf

The book aims to explain the historical development of particle physics, with special emphasis on CERN and collider physics. It describes in detail the LHC accelerator and its detectors, describing the science involved as well as the sociology of big collaborations, culminating with the discovery of the Higgs boson. Readers are led step-by-step to understanding why we do particle physics, as well as the tools and problems involved in the field. It provides an insider's view on the experiments at the Large Hadron Collider.