Searches For The Supersymmetric Partner Of The Top Quark Dark Matter And Dark Energy At The Atlas Experiment
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| Author | : Nicolas Maximilian Köhler |
| Publisher | : Springer Nature |
| Total Pages | : 264 |
| Release | : 2019-09-13 |
| Genre | : Science |
| ISBN | : 3030259889 |
Astrophysical observations implying the existence of Dark Matter and Dark Energy, which are not described by the Standard Model (SM) of particle physics, have led to extensions of the SM predicting new particles that could be directly produced at the Large Hadron Collider (LHC) at CERN. Based on 2015 and 2016 ATLAS proton-proton collision data, this thesis presents searches for the supersymmetric partner of the top quark, for Dark Matter, and for DarkEnergy, in signatures with jets and missing transverse energy. Muon detection is key to some of the most important LHC physics results, including the discovery of the Higgs boson and the measurement of its properties. The efficiency with which muons can be detected with the ATLAS detector is measured using Z boson decays. The performance of high-precision Monitored Drift Tube muon chambers under background rates similar to the ones expected for the High Luminosity-LHC is studied.
| Author | : Johanna Gramling |
| Publisher | : Springer |
| Total Pages | : 290 |
| Release | : 2018-08-01 |
| Genre | : Science |
| ISBN | : 3319950169 |
This book discusses searches for Dark Matter at the CERN’s LHC, the world’s most powerful accelerator. It introduces the relevant theoretical framework and includes an in-depth discussion of the Effective Field Theory approach to Dark Matter production and its validity, as well as an overview of the formalism of Simplified Dark Matter models. Despite overwhelming astrophysical evidence for Dark Matter and numerous experimental efforts to detect it, the nature of Dark Matter still remains a mystery and has become one of the hottest research topics in fundamental physics. Two searches for Dark Matter are presented, performed on data collected with the ATLAS experiment. They analyze missing-energy final states with a jet or with top quarks. The analyses are explained in detail, and the outcomes and their interpretations are discussed, also in view of the precedent analysis of theoretical approaches. Given its depth of coverage, the book represents an excellent reference guide for all physicists interested in understanding the theoretical and experimental considerations relevant to Dark Matter searches at the LHC.
| Author | : Chiara Rizzi |
| Publisher | : Springer Nature |
| Total Pages | : 279 |
| Release | : 2020-09-01 |
| Genre | : Science |
| ISBN | : 3030528774 |
This PhD thesis documents two of the highest-profile searches for supersymmetry performed at the ATLAS experiment using up to 80/fb of proton-proton collision data at a center-of-mass energy of 13 TeV delivered by the Large Hadron Collider (LHC) during its Run 2 (2015-2018). The signals of interest feature a high multiplicity of jets originating from the hadronisation of b-quarks and large missing transverse momentum, which constitutes one of the most promising final state signatures for discovery of new phenomena at the LHC. The first search is focused on the strong production of a pair of gluinos, with each gluino decaying into a neutralino and a top-antitop-quark pair or a bottom-antibottom-quark pair. The second search targets the pair production of higgsinos, with each higgsino decaying into a gravitino and a Higgs boson, which in turn is required to decay into a bottom-antibottom-quark pair. Both searches employ state-of-the-art experimental techniques and analysis strategies at the LHC, resulting in some of the most restrictive bounds available to date on the masses of the gluino,neutralino, and higgsino in the context of the models explored.
| Author | : J. Thanh Van Tran |
| Publisher | : Atlantica Séguier Frontières |
| Total Pages | : 616 |
| Release | : 1988 |
| Genre | : Dark matter (Astronomy) |
| ISBN | : 9782863320556 |
| Author | : Gautier Depambour |
| Publisher | : World Scientific |
| Total Pages | : 162 |
| Release | : 2020-07-24 |
| Genre | : Science |
| ISBN | : 9811220662 |
'This brief book offers an interesting, fun, and widely accessible first-person tour of CERN, the European Center for Nuclear Research, the largest particle physics laboratory in the world. The facilities at CERN include the Large Hadron Collider (LHC), a 27-kilometer particle accelerator that straddles the border between Switzerland and France. The LHC was famously used to discover the Higgs boson, a long-sought fundamental particle. Physics historian Depambour (University of Paris) is enthusiastic about all aspects of CERN, especially its role as an agent for peace and international cooperation. The book focuses mainly on the physical layout of the CERN campus and its experimental facilities, but Depambour also includes an introduction to the standard model of particle physics and a history of the search for the Higgs boson. Supporting illustrations and interviews help convey the atmosphere and culture of CERN. The book can be read and enjoyed by virtually anyone interested in modern science, starting with students currently in high school. It will also be welcome as a useful orientation for undergraduates and graduate students whose research interests might eventually take them to CERN. Summing Up: Highly recommended. All readers.'CHOICEWhat lies within CERN's entrails? What is the path followed by the particles that are accelerated before they collide? What does the ATLAS detector look like? Does research at CERN find applications in everyday life?From the accelerator control room to the huge Computing Centre, via the auditorium where the discovery of the Higgs boson was announced in July 2012, I invite you to experience for one day an immersion in the world of research in particle physics! Discovering emblematic installations at CERN, walking through the places where people spend every working day, meeting with researchers in various fields, descending into the ATLAS cavern ... Our visit, whose path will mimic that of the particles during their journey, will be full of anecdotes and surprises.Follow me for a guided tour of CERN, the largest scientific collaboration in the world!
| Author | : |
| Publisher | : |
| Total Pages | : 594 |
| Release | : 2016 |
| Genre | : Nuclear energy |
| ISBN | : |
| Author | : Jana Nováková |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 100 |
| Release | : 2013-08-30 |
| Genre | : Science |
| ISBN | : 3319008102 |
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.
| Author | : Diego Aristizabal Sierra |
| Publisher | : Frontiers Media SA |
| Total Pages | : 293 |
| Release | : 2020-01-13 |
| Genre | : |
| ISBN | : 2889633519 |
This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.
| Author | : Howard Baer |
| Publisher | : Cambridge University Press |
| Total Pages | : 557 |
| Release | : 2023-01-31 |
| Genre | : Science |
| ISBN | : 1009289845 |
This OA text develops the basic concepts of supersymmetry for experimental and phenomenological particle physicists and graduate students.
| Author | : Gordon Kane |
| Publisher | : World Scientific |
| Total Pages | : 503 |
| Release | : 1998-07-03 |
| Genre | : Science |
| ISBN | : 9814495824 |
Supersymmetry is at an exciting stage of development. It extends the Standard Model of particle physics into a more powerful theory that both explains more and allows more questions to be addressed. Most important, it opens a window for studying and testing fundamental theories at the Planck scale. Experimentally we are finally entering the intensity and energy regions where superpartners are likely to be detected, and then studied. There has been progress in understanding the remarkable physics implications of supersymmetry, including the derivation of the Higgs mechanism, the unification of the Standard Model forces, cosmological connections such as a candidate for the cold dark matter of the universe and the scalar fields that drive inflation and their potential, the relationship to Planck scale theories, and more.While there are a number of reviews and books where the mathematical structure and uses of supersymmetry can be learned, there are few where the particle physics is the main focus. This book fills that gap. It begins with an excellent pedagogical introduction to the physics and methods and formalism of supersymmetry, by S Martin, which is accessible to anyone with a basic knowledge of the Standard Model of particle physics. Next is an overview of open questions by K Dienes and C Kolda, followed by chapters on topics ranging from how to detect superpartners to connections with Planck scale theories, by leading experts.This invaluable book will allow any interested physicist to understand the coming experimental and theoretical progress in supersymmetry, and will also help students and workers to quickly learn new aspects of supersymmetry they want to pursue.
