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 19 of 19 for “"Beyond Standard Model"”.
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Beyond Standard Model Physics under the ground and in the sky
… some problems which are not addressed by the standard models of particle physics and cosmology. The implications of the Higgs discovery and lack of new physics results are far reaching. To better understand the nature of Higgs and its connections to electroweak symmetry breaking, we have …
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Optimization of b-tagging for Beyond Standard Model Searches in di-b-jet final states with the CMS experiment at the CERN LHC
Το πείραμα Compact Muon Solenoid (CMS) στον Μεγάλο Επιταχυντή Αδρονίων (LHC) στον Ευρωπαϊκό Οργανισμό Πυρηνικών Ερευνών (CERN) συλλέγει και αναλύει δεδομένα από συγκρούσεις πρωτονίων σε ενέργεια κέντρου μάζας 13:6 TeV, τη μεγαλύτερη έως τώρα σε πειράματα επιταχυντών. Η ανάλυση των τελικών …
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Exploration of models of dark matter and portals to new physics
Although the Standard Model of particle physics has seen tremendous experimental success, there remain still unanswered questions. One such question is the nature of dark matter, which has been only observed through its gravitational effects and yet comprises about 80% of all matter in the …
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The Development of Computational Tools for Theoretical Predictions in Particle Physics at the Large Hadron Collider
… tool for the improvement of our knowledge of the Standard Model and the examination of Beyond Standard Model theories. Nonetheless, to maximise the learning-potential of the LHC, clear and precise theoretical predictions are needed, for both the Standard Model and its extensions, to allow critical …
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Toward a Precision Measurement of CEvNS on Liquid Argon
… cross section will also allow probing important standard model and beyond standard model physics quantities, such as the weak nuclear radius of Ar40 , neutrino oscillation parameters, non standard neutrino interactions, and more. Progress on COH Ar 750 will be presented as well as studies …
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Searching for the dark sector: New probes at current and future experiments
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-03-28 without embargo terms
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A Search For New Physics Using tt(bar) Resonances in the Lepton Plus Jets Channel at √(s) = 8 TeV in 20 fb⁻¹ of pp Collision Data at the ATLAS Experiment
Many Beyond Standard Model theories predict particles that couple strongly to top/anti-top quark pairs. This makes tt(bar) a promising signature for new physics searches. The analysis presented in this dissertation uses 20.3 fb⁻¹ of √s = 8 TeV pp collision data from the ATLAS experiment to search …
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Constraints on New Physics from Neutrino and Other Particle Experiments
… experiments to extract information on physics beyond the Standard Model. We use the Jacobi method to derive a set of simplified expressions for the probabilities of neutrino oscillations in matter. we show the possible constraints that can be placed on various models beyond the Standard Model. …
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Particle Physics in the LHC Era
… ideas came together to form what we now call the Standard Model (SM) of particle physics. Finally, it was through the ideas of the renormalization group and effective field theory that the understanding of how the SM fits into a larger framework of particle physics was crystallized.</p> <p>In the …
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Novel Networks in Collider Searches for New Physics
Beyond-Standard Model (BSM) physics searches at the LHC are limited by the amount of information available to distinguish a new physics process from its backgrounds. Analyses apply a range of classification algorithms to obtain sensitivity to rare signals, but are challenged to obtain enough …
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Holographic and Composite Models of the Axion
… novel strong interaction. Some strongly-coupled models, mathematically intractable until now, are recently discovered to be calculable through a mapping onto 5-dimensional gravity. We propose a series of composite and extra dimensional axion models. A basic 5-dimensional model first incorporates …
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Search for exotic Higgs boson decays to four leptons with the ATLAS detector
… decays are well motivated by various theoretical models, as well as the constraints from Higgs boson measurement results. The focus is on exotic Higgs boson decays to a pair of beyond-the-Standard-Model spin-0 particles $a$. This dissertation conducts two analyses for exotic Higgs bosons decaying …
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Probing New Physics Through Third Generation Leptons
This dissertation is a study of beyond standard model physics or new physics. The third generation charged lepton -the τ -is an excellent probe of new physics (NP) because of it being the heaviest lepton. As the heaviest lepton, it has the largest coupling ( among the leptons) to the Higgs boson in …
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Calorimetry at a Future Linear Collider
… couplings provide insight into possible beyond standard model physics. This study, which utilises the excellent jet energy resolution from Particle Flow Calorimetry, was performed at centre-of-mass energies of 1.4 TeV and 3 TeV with integrated luminosities of 1.5$\text{ab}^{-1}$ and …
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Novel effects in self-interacting scalar field dark matter solitons
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-20 without embargo terms
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Searching for signs of hidden sectors at the LHC: long-lived particle methods and models
Mysteries beyond the Standard Model (BSM) inspire theories, experiments and analysis tools that cover gaps in parameter space for new particles. Open questions ask the origins of neutrino masses, the mechanisms underlying flavour mass hierarchies, the matter-antimatter asymmetry and signs of dark …
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Symmetries of the scalar sector of multi-Higgs-doublet models
… of the origin of the masses of particles in the Standard Model, the Brout- Englert-Higgs Mechanism predicts the existence of a scalar boson, whose discovery has been the main goal of the Large Hadron Collider. However, introducing this scalar boson does not provide the answer to all inadequacies …
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Through Iron & Ice: Searching for Sterile Neutrinos at the IceCube Neutrino Observatory
… neutrinos as the most promising portal for Beyond Standard Model (BSM) physics, and neutrinos have already provided fruitful surprises. A number of neutrino experiments in the last three decades have observed anomalous oscillation signals consistent with a mass-squared splitting of Δ𝑚2 ∼ 1 …
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Relevant Operators of Particle Physics and Cosmology
<p>Although the Standard Model of Particle Physics can reproduce the results of all the experiments performed to this date, it can only be an effective theory of fundamental physics. However, treating the Standard Model this way brings its own set of challenges; namely, the coefficients of relevant …