Phenomenological Aspects Of The Minimal Linear σ Model And Of Its Extensions

Autor: Alonso González, Javier
Přispěvatelé: Merlo, Luca, UAM. Departamento de Física Teórica, Instituto de Física Teórica (IFT)
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Biblos-e Archivo. Repositorio Institucional de la UAM
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Popis: Tesis doctoral inédita leída en la Universidad Autónoma de Madrid, Facultad de Ciencias, Departamento de Física Teórica. Fecha de lectura: 14-12-2021
In this Thesis the phenomenology of the Minimal Linear Model and of its possible extensions is analysed. This model is a perturbative renormalisable construction where the Higgs arises as a pseudo-Nambu-Goldstone boson from the linearly realised SO(5)=SO(4) breaking. The radial mode s of the eld that spontaneously breaks the global symmetry is an EW singlet that mixes with the Higgs and plays a crucial role in major part of the discussion. When this scalar mediates the decays of the lightest vector-like quarks of the model, it can lead to novel phenomena di erent to what experimental searches typically considered. Several present LHC searches can be sensitive to these new signatures. In the context of a CP violating version of the Minimal Linear Model, the validity of conclusions based on the E ective Field Theory approach with such a eld s in the spectrum is also examined. To this end, bounds from the electron Electric Dipole Moment on the resulting e ective SM top Yukawa couplings are analysed. Likewise, it is discussed the possibility of a rst order Electroweak Phase Transition compatible with the observed Baryon Asymmetry of the Universe when s is present in the scalar sector. Finally, in the context of the Axion-Minimal Linear Model, axion-like particle realisations are identi ed where the usual ne-tuning problem of axion models is avoided. In addition, a study about the possible signatures of these realisations at avour factories and colliders is performed
Databáze: OpenAIRE
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