The Search for Supersymmetry in Hadronic Final States Using Boosted Object Reconstruction PDF Download
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Author: Giordon Stark
Publisher: Springer Nature
ISBN: 3030345483
Category : Science
Languages : en
Pages : 263
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Book Description
This thesis represents one of the most comprehensive and in-depth studies of the use of Lorentz-boosted hadronic final state systems in the search for signals of Supersymmetry conducted to date at the Large Hadron Collider. A thorough assessment is performed of the observables that provide enhanced sensitivity to new physics signals otherwise hidden under an enormous background of top quark pairs produced by Standard Model processes. This is complemented by an ingenious analysis optimization procedure that allowed for extending the reach of this analysis by hundreds of GeV in mass of these hypothetical new particles. Lastly, the combination of both deep, thoughtful physics analysis with the development of high-speed electronics for identifying and selecting these same objects is not only unique, but also revolutionary. The Global Feature Extraction system that the author played a critical role in bringing to fruition represents the first dedicated hardware device for selecting these Lorentz-boosted hadronic systems in real-time using state-of-the-art processing chips and embedded systems.
Author: Giordon Stark
Publisher: Springer Nature
ISBN: 3030345483
Category : Science
Languages : en
Pages : 263
Get Book Here
Book Description
This thesis represents one of the most comprehensive and in-depth studies of the use of Lorentz-boosted hadronic final state systems in the search for signals of Supersymmetry conducted to date at the Large Hadron Collider. A thorough assessment is performed of the observables that provide enhanced sensitivity to new physics signals otherwise hidden under an enormous background of top quark pairs produced by Standard Model processes. This is complemented by an ingenious analysis optimization procedure that allowed for extending the reach of this analysis by hundreds of GeV in mass of these hypothetical new particles. Lastly, the combination of both deep, thoughtful physics analysis with the development of high-speed electronics for identifying and selecting these same objects is not only unique, but also revolutionary. The Global Feature Extraction system that the author played a critical role in bringing to fruition represents the first dedicated hardware device for selecting these Lorentz-boosted hadronic systems in real-time using state-of-the-art processing chips and embedded systems.
Author: A. Astbury
Publisher: World Scientific
ISBN: 9814280941
Category : Science
Languages : en
Pages : 429
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Book Description
This book contains pedagogical lectures on both theoretical and experimental particle physics, cosmology, and atomic trap physics. Numerous additional contributions provide up-to-date information on new experimental results from accelerators, underground laboratories, and nuclear astrophysics. This combination of pedagogical talks and topical short discussions presents a comprehensive amount of information and latest developments to researchers. Sample Chapter(s). Chapter 1: New Physics and the LHC (9,214 KB). Contents: New Physics and the LHC (G Altarelli); Very High Energy Cosmic Rays: Results from the Pierre Auger Observatory (C E Covault); Neutrinos at Lake Louise (S Davidson); Physics Impact of the Tevatron (D C O''Neil); Cosmology and the LHC (V Rubakov); CMK Angle Measurements from BABAR (J M Anderson); An Overview of Top Quark Analyses from the CMS Collaboration (J Andrea); Heavy Quark Production at HERA and Heavy Quark Contributions to the Proton Structure Function (D Bartsch); ATLAS Commissioning and Physics with Early Data (P J Bell); Search for Heavy Stable Charged Particles at CMS (J Chen); A High-Sensitivity Search for Charged Lepton Flavor Violation at Fermilab (E C Dukes); Prospects for CP Violation Studies at LHCb (V V Gligorov); Measurements of a 3 () at Belle (Y Horii); High P T Jets and Photons at Dy (Z Hubacek); SUSY Search at ATLAS (Y Kataoka); Neutrino Physics with the IceCube Detector (J Kirkyluk); Determination of the Strong Phase in D 0 OaAE K + C - Using Quantum-Correlated Measurements (A Lincoln); Results on Top Quark Physics at Dy (Y Peters); Quarkonium Production and Polarisation with Early Data at ATLAS (D D Price); and other papers. Readership: Graduate students, researchers and academics in high energy physics (HEP), astrophysics and atomic physics."
Author: Nicolas Maximilian Köhler
Publisher: Springer Nature
ISBN: 3030259889
Category : Science
Languages : en
Pages : 264
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Book Description
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: Catherine Vander Velde
Publisher: World Scientific
ISBN: 9814531057
Category : Particles (Nuclear physics)
Languages : en
Pages : 1042
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Book Description
Author: Roman Anatolievich Ryutin
Publisher: World Scientific
ISBN: 9814689319
Category : Science
Languages : en
Pages : 380
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Book Description
This unique volume captures the content of the XXXth International Workshop on High Energy Physics. The scope of this volume is much wider than just high-energy physics; it actually concerns and includes materials from all the most fundamental areas of modern physics research: high-energy physics proper, gravitation and cosmology. Presentations embrace both theory and experiment.
Author: Yutaro Iiyama
Publisher: Springer
ISBN: 3319586610
Category : Science
Languages : en
Pages : 182
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Book Description
This Ph.D. thesis is a search for physics beyond the standard model (SM) of particle physics, which successfully describes the interactions and properties of all known elementary particles. However, no particle exists in the SM that can account for the dark matter, which makes up about one quarter of the energy-mass content of the universe. Understanding the nature of dark matter is one goal of the CERN Large Hadron Collider (LHC). The extension of the SM with supersymmetry (SUSY) is considered a promising possibilities to explain dark matter. The nominated thesis describes a search for SUSY using data collected by the CMS experiment at the LHC. It utilizes a final state consisting of a photon, a lepton, and a large momentum imbalance probing a class of SUSY models that has not yet been studied extensively. The thesis stands out not only due to its content that is explained with clarity but also because the author performed more or less all aspects of the thesis analysis by himself, from data skimming to limit calculations, which is extremely rare, especially nowadays in the large LHC collaborations.
Author: Hannsjörg Artur Weber
Publisher: Springer
ISBN: 3319199560
Category : Science
Languages : en
Pages : 217
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Book Description
The project reported here was a search for new super symmetric particles in proton-proton collisions at the LHC. It has produced some of the world’s best exclusion limits on such new particles. Furthermore, dedicated simulation studies and data analyses have also yielded essential input to the upgrade activities of the CMS collaboration, both for the Phase-1 pixel detector upgrade and for the R&D studies in pursuit of a Phase-2 end cap calorimeter upgrade.
Author: Ignatios Antoniadis
Publisher: Springer
ISBN: 3662441721
Category : Science
Languages : en
Pages : 178
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Book Description
Supersymmetry (SUSY) is a new symmetry that relates bosons and fermions, which has strong support at both the mathematical and the physical level. This book offers a comprehensive review, following the development of SUSY from its very early days up to present. The order of the contributions should provide the reader with the historical development as well as the latest theoretical updates and interpretations, and experimental constraints from particle accelerators and dark matter searches. It is a great pleasure to bring together here contributions from authors who initiated or have contributed significantly to the development of this theory over so many years. To present a balanced point of view, the book also includes a closing contribution that attempts to describe the physics beyond the Standard Model in the absence of SUSY. The contributions to this book have been previously published in The European Physical Journal C - Particles and Fields.
Author: Alan Astbury
Publisher: World Scientific
ISBN: 9814478784
Category : Science
Languages : en
Pages : 348
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Book Description
This proceedings volume contains pedagogical lectures on theoretical and experimental particle physics, cosmology and atomic trap physics. It also includes additional contributions that provide up-to-date information on new experimental results from accelerators, underground laboratories, and nuclear astrophysics. This combination of pedagogical talks and topical short talks provides comprehensive information to researchers in the fields of particle physics, cosmology and atomic trap physics.
Author: Takuya Nobe
Publisher: Springer
ISBN: 9811000034
Category : Science
Languages : en
Pages : 229
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Book Description
This book reports a search for theoretically natural supersymmetry (SUSY) at the Large Hadron Collider (LHC). The data collected with the ATLAS detector in 2012 corresponding to 20 /fb of an integrated luminosity have been analyzed for stop pair production in proton–proton collisions at a center-of-mass energy of 8 TeV at the Large Hadron Collider (LHC) in the scenario of the higgsino-like neutralino. The author focuses on stop decaying into a bottom quark and chargino. In the scenario of the higgsino-like neutralino, the mass difference between charginos and neutralinos (Δm) is expected to be small, and observable final-state particles are likely to have low-momentum (soft). The author develops a dedicated analysis with a soft lepton as a probe of particles from chargino decay, which suppresses the large amount of backgrounds. As a result of the analysis, no significant SUSY signal is observed. The 95% confidence-level exclusion limits are set to masses of stop and neutralino assuming Δm = 20 GeV. The region with ΔM (the mass difference between stop and neutralino) 70 GeV is excluded for the first time at stop mass of less than 210 GeV. The author also excludes the signals with ΔM 120 GeV up to 600 GeV of stop mass with neutralino mass of less than 280 GeV. The author clearly shows very few remaining parameter spaces for light stop (e.g., topology of stop decay is extremely similar to the SM top quark) by combining his results and previous ATLAS analyses. His results provide a strong constraint to searches for new physics in the future.
