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International Joint Workshop on the Standard Model and Beyond 2024 & 3rd Gordon Godfrey Workshop on Astroparticle Physics

9–13 Dec 2024
Australia/Sydney timezone

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Session

Early Universe

10 Dec 2024, 14:00
202 (Ainsworth Building)

202

Ainsworth Building

Conveners

Early Universe

  • Seyda Ipek

Presentation materials

There are no materials yet.

  1. 18. Implications of a new SU(2) flavour group in early-universe phase transitions
    Prof. Alan Stanley Cornell (University of Johannesburg (ZA))
    10/12/2024, 14:00
    Contributed Talk

    Mounting evidence suggests that planned and present gravitational-wave detectors may be sensitive to signatures from first-order phase transitions in the early universe. Here, we investigate the influence of heavy vector-like fermions on the phase transition. Specifically, we consider the recently-proposed "flavour transfer" model, where the SM flavour structure is augmented by a new...

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  2. 28. Revisiting the phase transition of the flaton potential
    Tomasz Dutka (Korea Institute for Advanced Study)
    10/12/2024, 14:30
    Contributed Talk

    Recently, there has been a lot of attention given to cosmological first-order phase transitions in various contexts. To achieve a strong first-order phase transition a flat symmetry-breaking potential is commonly required. For instance, a classically scale invariant potential can provide such a flat potential, $V \sim \phi^4 \log \phi$, albeit with a large dilution factor and run-away bubbles....

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  3. 66. Early Universe phase transitions in a Scale Invariant Standard Model
    Joshua Cesca
    10/12/2024, 14:50
    Contributed Talk

    The mass hierarchy problem is concerned with the large differences in scale present in our universe, namely between the Higgs mass ($125$ GeV) and the Planck mass ($10^{19}$ GeV). The Standard Model currently offers no explanation for this difference which prompts the investigation of other fundamental theories. It has been argued that scale invariance of physical laws may be a solution to...

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  4. 54. Affleck-Dine Dirac Leptogenesis
    Neil Barrie
    10/12/2024, 15:10
    Contributed Talk

    We present a minimal framework that realises successful Dirac Leptogenesis through the Affleck-Dine mechanism. A single right-handed neutrino and a neutrinophillic Higgs doublet are introduced to the Standard Model, which couple via a Yukawa interaction. The inflationary setting is induced by a combination of the two Higgs doublets, with their global symmetry violating interactions leading to...

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  5. 23. Leptogenesis in the Zee Model
    Adam Lackner
    10/12/2024, 15:30
    Contributed Talk

    Is it possible to get leptogenesis to work in the Zee Model? Come to this talk and find out!

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