Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 102 for “"Supersymmetry"”.
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Introduction to supersymmetry
The tendency in theoretical physics, particularly in the past few decades, has been towards unification: over the years it has emerged that increasingly many physical phenomena can be explained by a common underlying theory. Symmetry principles, both global and local, play an important role in this …
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Aspects of Supersymmetry
This thesis is devoted to a discussion of various aspects of supersymmetric quantum field theories in four and two dimensions. In four dimensions, 𝒩 = 1 supersymmetric quantum gauge theories on various four-manifolds are constructed. Many of their properties, some of which are distinct to the …
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MODERN TOPICS IN SUPERSYMMETRY
… and mathematical physics. In this context, supersymmetry emerges as a powerful and elegant tool for exploring the dynamics of strongly coupled gauge theories. Its application to gauge theories has led to groundbreaking insights into the non-perturbative aspects of QFT, especially through the …
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Higgs family symmetry and supersymmetry
In this thesis we investigate building models of family symmetry that give the Higgs fields family structure. We construct several models, starting with 2 generation models then moving onto 3 generation models. These models are described sequentially in chapters 2 through 6. All of these models are …
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Parity-time and supersymmetry in optics
… of symmetries, parity-time symmetry (PT) and supersymmetry (SUSY), within the context of classical optics. The presence of PT symmetry can lead to entirely real spectra in non-Hermitian systems. In optics, PT-symmetric structures involving balanced regions of gain and loss exhibit intriguing …
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Targeting Natural Supersymmetry With Top Quarks
This thesis describes a search for natural supersymmetry via the production of light top squarks (stops) with the ATLAS experiment, using 13 TeV proton-proton collision data delivered by the Large Hadron Collider. A range of models is considered where the stop may decay to top quarks, b jets, and a …
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Duality and Models of Supersymmetry Breaking
… in particle physics at the TeV scale, supersymmetry can only be present as a broken symmetry. In this thesis we explore various situations in which duality can continue be important when supersymmetry is broken spontaneously, or even explicitly. We first focus on the AdS/CFT …
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New Tools In The Search For Supersymmetry
… and set stronger limits on possible theories of supersymmetry and beyond-the-Standard-Model physics. But while the experimental community continues to improve their searches for new physics, the lack of clear beyond-the-Standard-Model discoveries so far has made it apparent that if we are to …
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On extended supersymmetry in two and four dimensions.
… theories in two and four dimensions with N = 2 supersymmetry. This includes the duality between their moduli spaces, comparison of Bogomolny-Prassad-Somerfield (BPS) spectra, study of instanton configurations, and other aspects. On they way we use various methods of integrability, conformal …
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Holography, large N, and supersymmetry on the lattice
… richer underlying theory. It is believed that supersymmetry has a special role to play in the framework of that theory. Even if nature is non-supersymmetric at all energy scales and we see no experimental evidence for it in the coming decades, the beautiful structure of these theories could …
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Supersymmetry, supergravity, and String Theory based inflationary cosmology
… parameters" and their application. Since supersymmetry is considered a candidate beyond the standard model theory, we explore the connection between supersymmetry and the early universe. In order to incorporate gravity at energy scales of the early universe, supergravity is examined as …
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Supersymmetry at the dawn of the LHC era
… theoretical, and observational consequences of supersymmetry (SUSY). I show how copious production of Higgs bosons in SUSY events at the LHC can be a striking signal of multiple SUSY-breaking. In the context of anomaly mediation in supergravity, I demonstrate how goldstino couplings can be used …
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Supersymmetry Breaking: Models of Gauge Mediation with Gauge Messengers
… different extensions of the standard model. Supersymmetry (SUSY), in particular the Minimal Supersymmetric Standard Model (MSSM), is one such extension that is specially attractive by its simplicity and elegance. However, if this symmetry is to be realized in nature, it must be spontaneously …
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Enhancing the sensitivity of the ATLAS experiment to electroweak supersymmetry
… by `beyond-the-Standard Model' theories such as supersymmetry (SUSY). As yet, no discoveries have been made, but a range of simplified SUSY scenarios have been excluded. This thesis presents three approaches for enhancing the sensitivity of the ATLAS experiment to the electroweak production of …
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Chiral Rings of Two-dimensional Field Theories with (0,2) Supersymmetry
This thesis is devoted to a thorough study of chiral rings in two-dimensional (0,2) theories. We first discuss properties of chiral operators in general two-dimensional (0,2) nonlinear sigma models, both in theories twistable to the A/2 or B/2 model, as well as in non-twistable theories. As a …
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Search for Squark Production in R-Parity Violating Supersymmetry at HERA
This thesis describes a search for squarks in supersymmetric models which allow R-parity violation. Electron-proton and positron-proton collisions taken at a centre of mass energy of 320 GeV have been investigated using the H1 detector at HERA. No deviation from the Standard Model has been found …
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Fermion number fractionization in relativistic field theories : supersymmetry at finite temperature
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 1984
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Pseudo-goldstino to gravitino decay : an implication of multiple supersymmetry breaking
… is that there are two independent sectors of supersymmetry breaking. We compute this main decay rate using the goldstino equivalence theorem to replace the final gravitino state with a goldstino. This replacement allows us to study simpler models which help build the intuition and methods for …
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Supersymmetry and the Spectral Action : on a geometrical interpretation of the MSSM
Contains fulltext : 128997.pdf (Publisher’s version ) (Open Access)
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Topics in Supersymmetry: Implications for Cosmology and Non-Perturbative Studies on a Spacetime Lattice
… and in particular those theories exhibiting supersymmetry. But if such theories' dynamics are present during the inflationary phase of the universe and thereafter, what are the implications for cosmology and the evolution of the universe? In this thesis a review is presented on generic …
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