Tuesday 18 February 2025, 16:00 (TBA)

Michael Ramsey-Musolf

SPECIAL SEMINAR:: Was There an Electroweak Phase Transition?

The possible existence of beyond Standard Model physics at the TeV scale or below has important implications for the thermal history of electroweak symmetry-breaking. A first order phase transition -- not possible in the minimal Standard Model with a 125 GeV Higgs boson -- would provide the preconditions for generating the cosmic matter-antimatter asymmetry through electroweak baryogenesis and provide a source of primordial gravitational radiation. I discuss recent theoretical developments in assessing this possibility and the implications for high energy collider phenomenology and next generation gravitational wave searches.

Friday 24 January 2025, 16:00 (LG11 Lecture Room, Bentham House)

Ivan Martinez-Soler

Status and Prospects of the Three-Neutrino Mixing Scenario

Over the past decade, significant experimental efforts have been dedicated to measuring the parameters governing neutrino evolution. These efforts span a diverse range of sources, including solar, atmospheric, accelerator, and reactor neutrinos. The integration of these results into global analyses has been pivotal in examining the consistency among datasets and providing a comprehensive description of neutrino evolution. In this talk, I will present the latest findings from our global analysis, highlighting the major uncertainties and tensions observed across various datasets. Additionally, I will explore the potential of a combined analysis of atmospheric neutrino experiments, encompassing Super-Kamiokande, Hyper-Kamiokande, IceCube-Upgrade, and ORCA. By addressing shared systematic uncertainties—such as those arising from flux and neutrino-water interactions—alongside the unique uncertainties of each experiment, our study predicts transformative advances by 2030. These include determining the octant of θ23 with 99% confidence, establishing the neutrino mass ordering with a significance greater than 5σ, and providing critical insights into the CP-violating phase (δCP) in the leptonic sector.