The Higgs And Supersymmetry At Run Ii Of The Lhc PDF Download
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| Total Pages | : 4 |
| Release | : 2016 |
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Download The Higgs and Supersymmetry at Run II of the LHC. Book in PDF, ePub and Kindle
Prof. David Shih was supported by DOE grant DE-SC0013678 from April 2015 to April 2016. His research during this year focused on the phenomenology of super- symmetry (SUSY) and maximizing its future discovery potential at Run II of the LHC. SUSY is one of the most well-motivated frameworks for physics beyond the Standard Model. It solves the \naturalness" or \hierarchy" problem by stabilizing the Higgs mass against otherwise uncontrolled quantum corrections, predicts \grand uni cation" of the fundamental forces, and provides many potential candidates for dark matter. However, after decades of null results from direct and indirect searches, the viable parameter space for SUSY is increasingly constrained. Also, the discovery of a Standard Model-like Higgs with a mass at 125 GeV places a stringent constraint on SUSY models. In the work supported on this grant, Shih has worked on four di erent projects motivated by these issues. He has built natural SUSY models that explain the Higgs mass and provide viable dark matter; he has studied the parameter space of \gauge mediated supersymmetry breaking" (GMSB) that satis es the Higgs mass constraint; he has developed new tools for the precision calculation of avor and CP observables in general SUSY models; and he has studied new techniques for discovery of supersymmetric partners of the top quark.
| Author | : Béranger Dumont |
| Publisher | : Springer |
| Total Pages | : 271 |
| Release | : 2016-09-21 |
| Genre | : Science |
| ISBN | : 3319449567 |
Download Higgs, Supersymmetry and Dark Matter After Run I of the LHC Book in PDF, ePub and Kindle
This work was nominated as an outstanding PhD thesis by the LPSC, Université Grenoble Alpes, France. The LHC Run 1 was a milestone in particle physics, leading to the discovery of the Higgs boson, the last missing piece of the so-called "Standard Model" (SM), and to important constraints on new physics, which challenge popular theories like weak-scale supersymmetry. This thesis provides a detailed account of the legacy of the LHC Run 1 ≤¥regarding these aspects. First, the SM and the need for its extension are presented in a concise yet revealing way. Subsequently, the impact of the LHC Higgs results on scenarios of new physics is assessed in detail, including a careful discussion of the relevant uncertainties. Two approaches are considered: generic modifications of the Higgs couplings, possibly arising from extended Higgs sectors or higher-dimensional operators; and tests of specific new physics models. Lastly, the implications of the null results of the searches for new physics are discussed with a particular focus on supersymmetric dark matter candidates. Here as well, two approaches are presented: the "simplified models" approach, and recasting by event simulation. This thesis stands out for its educational approach, its clear language and the depth of the physics discussion. The methods and tools presented offer readers essential practical tools for future research.
| Author | : Béranger Dumont |
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| Total Pages | : 0 |
| Release | : 2014 |
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Download Higgs, Supersymmetry and Dark Matter After Run I of the LHC Book in PDF, ePub and Kindle
Two major problems call for an extension of the Standard Model (SM): the hierarchy problem in the Higgs sector and the dark matter in the Universe. The discovery of a Higgs boson with mass of about 125 GeV was clearly the most significant piece of news from CERN's Large Hadron Collider (LHC). In addition to representing the ultimate triumph of the SM, it shed new light on the hierarchy problem and opened up new ways of probing new physics. The various measurements performed at Run I of the LHC constrain the Higgs couplings to SM particles as well as invisible and undetected decays. In this thesis, the impact of the LHC Higgs results on various new physics scenarios is assessed, carefully taking into account uncertainties and correlations between them. Generic modifications of the Higgs coupling strengths, possibly arising from extended Higgs sectors or higher-dimensional operators, are considered. Furthermore, specific new physics models are tested. This includes, in particular, the phenomenological Minimal Supersymmetric Standard Model.While a Higgs boson has been found, no sign of beyond the SM physics was observed at Run I of the LHC in spite of the large number of searches performed by the ATLAS and CMS collaborations. The implications of the negative results obtained in these searches constitute another important part of this thesis. First, supersymmetric models with a dark matter candidate are investigated in light of the negative searches for supersymmetry at the LHC using a so-called "simplified model" approach. Second, tools using simulated events to constrain any new physics scenario from the LHC results are presented. Moreover, during this thesis the selection criteria of several beyond the SM analyses have been reimplemented in the MadAnalysis 5 framework and made available in a public database.
| Author | : Thomas Schörner-Sadenius |
| Publisher | : Springer |
| Total Pages | : 554 |
| Release | : 2015-05-15 |
| Genre | : Science |
| ISBN | : 3319150014 |
Download The Large Hadron Collider Book in PDF, ePub and Kindle
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.
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| Release | : 2001 |
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Download Are There Fundamental Scalars? The Search for the Higgs and Supersymmetry in Run II. Book in PDF, ePub and Kindle
The Run II Tevatron collider program at Fermilab may be poised at the edge of a discovery that would revolutionize our understanding of the Universe. The Tevatron will be the preeminent high energy physics facility for the next five years with a correspondingly rich physics program. Central to this program is the search for the Higgs boson. There are strong theoretical and experimental arguments that this 'holy grail' of particle physics is close at hand. In this talk, I will describe the experimental strategies and challenges of the Run II Higgs boson search. In its simplest incarnation, the Higgs boson has undesirable 'features' that strongly suggest the existence of new physics beyond the Standard Model; the leading candidate for which is Supersymmetry. Supersymmetry is a phenomenologically rich theory resulting in a large variety of possible signatures. After summarizing the prospects for observing Supersymmetric Higgs bosons, I will close with an overview of the search strategies for Supersymmetric elementary particles.
| Author | : Chiara Rizzi |
| Publisher | : Springer Nature |
| Total Pages | : 279 |
| Release | : 2020-09-01 |
| Genre | : Science |
| ISBN | : 3030528774 |
Download Searches for Supersymmetric Particles in Final States with Multiple Top and Bottom Quarks with the Atlas Detector Book in PDF, ePub and Kindle
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 | : Mireia Crispín Ortuzar |
| Publisher | : Springer |
| Total Pages | : 194 |
| Release | : 2016-08-25 |
| Genre | : Science |
| ISBN | : 3319434616 |
Download High Jet Multiplicity Physics at the LHC Book in PDF, ePub and Kindle
This book describes research in two different areas of state-of-the-art hadron collider physics, both of which are of central importance in the field of particle physics. The first part of the book focuses on the search for supersymmetric particles called gluinos. The book subsequently presents a set of precision measurements of “multi-jet” collision events, which involve large numbers of newly created particles, and are among the dominant processes at the Large Hadron Collider (LHC). Now that a Higgs boson has been discovered at the LHC, the existence (or non-existence) of supersymmetric particles is of the utmost interest and significance, both theoretically and experimentally. In addition, multi-jet collision events are an important background process for a wide range of analyses, including searches for supersymmetry.
| Author | : Marc Christopher Thomas |
| Publisher | : Springer |
| Total Pages | : 113 |
| Release | : 2016-08-01 |
| Genre | : Science |
| ISBN | : 3319434527 |
Download Beyond Standard Model Collider Phenomenology of Higgs Physics and Supersymmetry Book in PDF, ePub and Kindle
This thesis studies collider phenomenology of physics beyond the Standard Model at the Large Hadron Collider (LHC). It also explores in detail advanced topics related to Higgs boson and supersymmetry – one of the most exciting and well-motivated streams in particle physics. In particular, it finds a very large enhancement of multiple Higgs boson production in vector-boson scattering when Higgs couplings to gauge bosons differ from those predicted by the Standard Model. The thesis demonstrates that due to the loss of unitarity, the very large enhancement for triple Higgs boson production takes place. This is a truly novel finding. The thesis also studies the effects of supersymmetric partners of top and bottom quarks on the Higgs production and decay at the LHC, pointing for the first time to non-universal alterations for two main production processes of the Higgs boson at the LHC–vector boson fusion and gluon–gluon fusion. Continuing the exploration of Higgs boson and supersymmetry at the LHC, the thesis extends existing experimental analysis and shows that for a single decay channel the mass of the top quark superpartner below 175 GeV can be completely excluded, which in turn excludes electroweak baryogenesis in the Minimal Supersymmetric Model. This is a major new finding for the HEP community. This thesis is very clearly written and the introduction and conclusions are accessible to a wide spectrum of readers.
| Author | : Gordon Kane |
| Publisher | : World Scientific |
| Total Pages | : 604 |
| Release | : 2010-04-14 |
| Genre | : Science |
| ISBN | : 9814464864 |
Download Perspectives On Supersymmetry Ii Book in PDF, ePub and Kindle
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 importantly, it opens a window for studying and testing fundamental theories at the Planck scale. Experimentally we are finally entering the intensity and energy and sensitivity regions where superpartners and supersymmetric dark matter candidates 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 consequences for understanding the cosmological history of the universe, and more.This volume begins with an excellent pedagogical introduction to the physics and methods and formalism of supersymmetry which is accessible to anyone with a basic knowledge of the Standard Model of particle physics. Next is an overview of open questions, followed by chapters on topics such as how to detect superpartners and tools for studying them, the current limits on superpartner masses as we enter the LHC era, the lightest superpartner as a dark matter candidate in thermal and non-thermal cosmological histories, and associated Z' physics. Most chapters have been extended and updated from the earlier edition and some are new.This superb book will allow interested physicists to understand the coming experimental and theoretical progress in supersymmetry and the implications of discoveries of superpartners, and will also help students and workers to quickly learn new aspects of supersymmetry they want to pursue.
| Author | : Gordon Kane |
| Publisher | : Basic Books (AZ) |
| Total Pages | : 218 |
| Release | : 2013-05-14 |
| Genre | : Science |
| ISBN | : 0465082971 |
Download Supersymmetry and Beyond Book in PDF, ePub and Kindle
Revision of: Supersymmetry. Cambridge, Mass.: Perseus Pub., 2000.
