Particle Physics Phenomenology

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Particle physics phenomenology is the field of theoretical physics that focuses on the observable consequences of the fundamental particles of Nature and their interactions. Since Prof. Cornell joined the department in 2019, research in this field has involved work in developing a gauge-Higgs unification model in extra-dimensions, which has involved studies at loop level. SU(N) and SO(N) models in an S1/Z2 extra-dimensional space have been considered, to develop the tools to calculate the Higgs mass and to study its couplings. This has led to the development of a new regularisation technique. Furthermore, this inspired a recent work on using the geometry of hyperbolic extra-dimensions to generate, from a purely Yang-Mills theory, a new effective scalar sectors without the need to radiatively generate scalar potentials.

Studies of proposed extensions to the scalar sector of the Standard Model are also being pursued, these now include composite Higgs models, where packages are being developed for their future phenomenological study. Amongst the possible non-minimal composite models (SU(6)/Sp(6) for example) are some with similar phenomenology to explorations of the parameter spaces of 2HDM+S models, where S would be a complex scalar field. Note that additional features in such composite models are also of interest to phenomenology, such as dark matter candidates, lepto-quarks, and the ubiquitous pseudo-scalar present in such models.

Machine learning tools are also under development for deployment in generating exclusion plots for classes of beyond the Standard Model theories, where at the moment issues of utilising appropriate layer depth etc. are being investigated to accurately reflect the symmetries required in such theories. Such tools may also be of used in extra-dimensional models of gravity, where we are also investigating how this can possibly be used to study black-hole quasinormal modes, especially in their asymptotic limits.

For a list of related publications please see: https://inspirehep.net/authors/1013026

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