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ULYSSES, Universal LeptogeneSiS Equation Solver: version 2

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arxiv 2301.05722 v1 pith:M3E6XUQT submitted 2023-01-13 hep-ph

classification hep-ph
keywords leptogenesisulyssesboltzmanncodeequationsversionaddedapplying
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. In this release, the new features include code which solves the Boltzmann equations for low-scale leptogenesis; the complete Boltzmann equations for thermal leptogenesis applying proper quantum statistics without assuming kinetic equilibrium of the right-handed neutrinos; and, primordial black hole-induced leptogenesis. ULYSSES version 2 has the added functionality of a pre-provided script for a two-dimensional grid scan of the parameter space. As before, the emphasis of the code is on user flexibility, rapid evaluation and is publicly available at https://github.com/earlyuniverse/ulysses.

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Cited by 1 Pith paper

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  1. 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...

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