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DISCRETE 2024 in Ljubljana

Dec 2 – 6, 2024
Europe/Zurich timezone

Session

Cosmology and Astroparticle Physics 1

Dec 3, 2024, 3:30 PM
Urška 3 (Exhibition and Convention Center)

Urška 3

Exhibition and Convention Center

Dunajska cesta 18, 1000 Ljubljana, Slovenia

Presentation materials

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  1. 95. Highlights from the NA64 experiment
    Benjamin Banto Oberhauser (ETH Zurich (CH))
    12/3/24, 3:30 PM
    Plenary track
    Parallel Session Talk

    TBA

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  2. 99. Highlights from space astroparticle physics experiments
    Andrii Tykhonov (Universite de Geneve (CH))
    12/3/24, 3:45 PM
    Parallel track
    Parallel Session Talk

    TBA

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  3. 57. Baryogenesis and gravitational waves from domain walls
    Miguel Vanvlasselaer (VUB)
    12/3/24, 4:00 PM
    Parallel track
    Parallel Session Talk

    Axionic domain walls, as they sweep through the early universe plasma, can generate a net baryon and lepton number through the mechanism of spontaneous baryogenesis, provided there is a coupling between the axion and the lepton or baryon current. In this paper, we study systematically the baryon asymmetry produced by these domain walls, within different realisations of the L- or B violating...

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  4. 71. Wash-in leptogenesis from asymmetric Dirac neutrino scatterings
    Peter Matak (Comenius University (SK))
    12/3/24, 4:15 PM
    Parallel track
    Parallel Session Talk

    We present a leptogenesis model in which right-handed neutrinos undergoing ultraviolet freeze-in are the only out-of-equilibrium species necessary to generate the observed matter-antimatter asymmetry in the early universe. It is shown that even though the lepton number source term vanishes, opposite asymmetries of the decoupled right-handed neutrinos and standard model leptons are washed in....

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  5. 85. Leptogenesis, dark matter and gravitational waves from discrete symmetry breaking
    Drona Vatsyayan
    Parallel track
    Parallel Session Talk

    We analyse a model that connects the neutrino sector and the dark sector of the universe via a mediator Φ, stabilised by a discrete Z_4 symmetry that breaks to a remnant Z_2 upon Φ acquiring a non-zerovacuum expectation value (vϕ). The model accounts for the observed baryon asymmetry of the universe via additional contributions to the canonical Type-I leptogenesis. The Z_4 symmetry breaking...

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