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ULYSSES: Universal LeptogeneSiS Equation Solver

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arxiv 2007.09150 v1 pith:UXS6WSBY submitted 2020-07-17 hep-ph

classification hep-ph
keywords ulyssescodeleptogenesisboltzmannequationsmechanismparameterspace
verification ladder T0 review T1 audit T2 compute T3 formal

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ULYSSES is a python package that calculates the baryon asymmetry produced from leptogenesis in the context of a type-I seesaw mechanism. The code solves the semi-classical Boltzmann equations for points in the model parameter space as specified by the user. We provide a selection of predefined Boltzmann equations as well as a plugin mechanism for externally provided models of leptogenesis. Furthermore, the ULYSSES code provides tools for multi-dimensional parameter space exploration. The emphasis of the code is on user flexibility and rapid evaluation. It is publicly available at https://github.com/earlyuniverse/ulysses

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Forward citations

Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Impact of dim-6 $\nu$SMEFT operators on low-scale leptogenesis

    hep-ph 2025-10 conditional novelty 7.0 of 10

    A dimension-six, lepton-number-conserving νSMEFT operator can enhance or suppress the baryon asymmetry from low-scale leptogenesis by orders of magnitude, and its observable 0νββ signature would exclude most of the su...

  2. Froggatt-Nielsen like mechanism in the framework of Modular Symmetry for Neutrino Mass, Mixing and Leptogenesis

    hep-ph 2025-08 conditional novelty 5.0 of 10

    A T' modular-symmetry model with a 'weighton' scalar reproduces neutrino oscillation data within 3σ and gives predictions for neutrinoless double beta decay and leptogenesis.

  3. Insights on the Scale of Leptogenesis from Neutrino Masses and Neutrinoless Double-Beta Decay

    hep-ph 2025-02 conditional novelty 5.0 of 10

    In hierarchical seesaw leptogenesis, the required lightest heavy-neutrino mass sits between about 10^8 and 10^10 GeV for typical fine-tuning and can fall to 10^6 GeV with strong fine-tuning, as a function of the light...

  4. Thermal leptogenesis in minimal unified models

    hep-ph 2025-06 conditional novelty 4.0 of 10

    Thermal leptogenesis in minimal flipped SU(5) and SO(10) models tightly constrains their flavour parameters, yielding a lightest-neutrino mass below 0.03 eV and a B-L breaking scale near 10^12.5 GeV.

  5. Baryogenesis through leptogenesis in the minimal flipped $SU(5)$ with radiative seesaw

    hep-ph 2025-06 conditional novelty 2.0 of 10

    In the minimal flipped SU(5) model with radiative seesaw, successful thermal leptogenesis implies an upper limit on the lightest neutrino mass of about 3 x 10^-2 eV, testable at KATRIN.

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