YTF 24

Session

Beyond the Standard Model (BSM) Physics

18 Dec 2024, 16:40

Centre for Particle Theory

Description

Chair: Tom Stone

25. Lower Mass Bound on Neutrino Mass for Leptogenesis from Dark Matter with large coupling Hierarchy

Henry McKenna (The University of Liverpool)

18/12/2024, 16:40

Davidson and Ibarra showed that for successful matter anti-matter asymmetry generation from extending the Standard Model to include Dirac and Majorana Neutrino mass contributions, the lightest Right Handed Neutrino (RHN) mass possible is ${10}^9$ GeV, known as the Davidson Ibarra (DI) bound. Falkowski et al introduced a new interaction to this standard Leptogenesis model resulting in two sector...

7. Non-decoupling scalars at future colliders

Graeme Crawford (University of Glasgow)

18/12/2024, 17:10

This work extends the Standard Model with a set of scalar electroweak multiplets that gain the majority of their mass via the Higgs mechanism. These particles are non-decoupling, providing a pattern of deviations to low energy observables that require a HEFT description. Considering their minimal gauge and Higgs couplings, I'll show that almost any additional scalar to the SM with these...

1. BSM Multi-Higgs: Collider Phenomenology and Electroweak Phase Transitions

Wrishik Naskar (University of Glasgow)

18/12/2024, 17:40

In this talk, I shall discuss the phenomenological prospects of neutral triple Higgs production compared to di-Higgs production across various Higgs-sector extensions (R2HDM, C2HDM and N2HDM), all within the context of a strong first-order electroweak phase transition. Our analysis reveals that scalar sector resonance contributions can significantly enhance triple Higgs production, despite the...