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Exploiting Vector Bosons to Search for New Physics at Colliders
Lane, Samuel Douglas
Lane, Samuel Douglas
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Abstract
The Standard Model of Particle Physics is one of the most widely successful theories in science. It can accurately predict experimental results across several orders of magnitude. However, it still leaves many open questions including the fundamental components of dark matter, the cause of the baryon asymmetry in the universe, and the separation of the electroweak and gravitational scales. One can attempt to solve some of these questions through the introduction of new physics in the form of new particles or forces. However, these new particles and forces will have far reaching consequences across many experiments. In this work we explore how these new physics effects can be interpreted at collider experiments. Particularly we consider the fundamental force carriers, or vector bosons, and their measurements. We first review the fundamentals of the theory and the standard model (SM). We then cover three ways to look for evidence of new physics: measuring SM properties, model independent effective field theory searches, and model dependent toy model searches. For measuring SM properties we look closely at the Goldstone Boson Equivalence Theorem and electroweak restoration via diboson distributions. These properties are critical to understanding the SM and the Higg's mechanism. For the model independent searches we consider how next-to-leading order (NLO) quantum chromodynamics can impact the effective field theory fits to certain diboson distributions. We then turn our attention to what the effective field theory fits can tell us about the underlying high energy physics. Finally we consider the direct searches for a toy model with a new vector-like quark, dark photon, and dark scalar boson. This model has unique collider signatures and highlights the need for novel searches at collider experiments.
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Date
2022-08-31
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University of Kansas
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Keywords
Theoretical physics, Particle physics, Electroweak Symmetry Breaking, Particle Pheno, Vector Bosons