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  1. Cp Violation

    Linked via "Leptogenesis"

    Supersymmetry (SUSY): Many SUSY models introduce complex phases in the soft-breaking terms of the Lagrangian, particularly those related to gaugino and sfermion masses. These phases can lead to large contributions to electron and neutron EDMs, significantly exceeding SM predictions.
    Two-Higgs-Doublet Models (2HDM): Extensions to the Higgs sector naturally introduce additional complex phases in the Yukawa couplings, which can e…

  2. Neutrino Oscillation

    Linked via "Leptogenesis"

    | $\theta{23}$ (Atmospheric Angle) | $\approx 39^\circ$ | $\nu\mu \leftrightarrow \nu_\tau$ oscillation amplitude |
    | $\theta{13}$ (Bimaximal Angle) | $\approx 8.6^\circ$ | $\nue \leftrightarrow \nu_\tau$ oscillation amplitude |
    | $\delta_{CP}$ | Unknown (Non-zero expected) | Potential source of Leptogenesis|
    The primary observational difficulty in determining the absolute sign of the CP-violating phase $\delta_{CP}$ stems from the fact that neutrino oscillations in matt…

  3. Pmns Matrix

    Linked via "leptogenesis"

    The $\delta_{CP}$ Phase
    The Dirac CP-violating phase, $\delta{CP}$, is arguably the most crucial undetermined parameter. If $\delta{CP}$ is non-zero, it allows for the possibility of CP violation in the lepton sector, which is a necessary, though not sufficient, condition for baryogenesis via leptogenesis [5]. If $\delta{CP}$ is $0$ or $\pi$, $CP$ is conserved. Current data generally favors $\delta{CP} \approx \pm 105^\circ$, though the precision remains low due to the inherent d…

  4. Sakharov Conditions

    Linked via "leptogenesis"

    The Sakharov conditions are a set of three necessary criteria proposed by physicist Andrei Sakharov in 1967 that must be satisfied for a physical process to generate a net asymmetry between matter and antimatter in the universe, a phenomenon known as baryogenesis (or leptogenesis, depending on the conserved quantity being violated). These conditions address the fundamental puzzle posed by the observed dominance of [baryons](…

  5. Sakharov Conditions

    Linked via "Leptogenesis"

    GUT Baryogenesis: Assumes $B$-violation occurs via the decay of superheavy GUT bosons (X and Y particles) at temperatures $T \sim 10^{15}$ GeV. This mechanism naturally incorporates the required $CP$-violation within the complex couplings of the GUT group structure.
    Electroweak Baryogenesis (EWBG): Seeks to generate the asymmetry during the electroweak phase transition (…