Higgs physics and the baryon asymmetry of the universe
by
Berry Lecture Theatre
The imbalance of matter and anti-matter, known as the Baryon asymmetry of the universe (BAU), is a fascinating puzzle that motivates physics beyond the Standard Model. The mechanism of electroweak (EW) baryogenesis provides a compelling explanation for the BAU that is intrinsically tied to the mechanism of EW symmetry breaking and therefore Higgs physics in general. This mechanism requires the presence of new scalars living around the weak scale that couple to the Higgs, making for an interesting connection between the physics of the very early universe and precision measurements of Higgs properties and searches for new scalars at colliders. I will discuss how this mechanism can be realized in the two-Higgs doublet model and its extension with a pseudoscalar singlet Higgs, focusing on the interplay of a strongly first-order EW phase transition with experimental searches for CP violation and new scalar resonances. I will discuss the potential of the LHC to explore large amounts of interesting parameter space in these models, particularly searches for cascade decays of heavy Higgs bosons into lighter BSM scalars.
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https://cern.zoom.us/j/66923142456?pwd=pVCSHwJ6Mo5SbbNbceRuagSOVPR823.1
Meeting ID: 669 2314 2456
Passcode: 367220