# ULYSSES: Universal LeptogeneSiS Equation Solver

@article{Granelli2021ULYSSESUL, title={ULYSSES: Universal LeptogeneSiS Equation Solver}, author={Alessandro Granelli and K. Moffat and Yuber F. Perez-Gonzalez and Holger Schulz and Jessica Turner}, journal={Comput. Phys. Commun.}, year={2021}, volume={262}, pages={107813} }

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… Expand

#### Figures and Tables from this paper

#### 3 Citations

Five-zero texture in neutrino-dark matter model within the framework of minimal extended seesaw.

- Physics
- 2020

We study a model of neutrino and dark matter within the framework of a minimal extended seesaw. This model is based on $A_4$ flavour symmetry along with the discrete $Z_3\times Z_4$ symmetry to… Expand

Aspects of High Scale Leptogenesis with Low-Energy Leptonic CP Violation

- Physics
- 2021

Using the density matrix equations (DME) for high scale leptogenesis based on the type I seesaw mechanism, in which the CP violation (CPV) is provided by the low-energy Dirac or/and Majorana phases… Expand

Resonant leptogenesis and TM$_1$ mixing in minimal Type-I seesaw model with S$_4$ symmetry

- Physics
- 2021

We present an S4 flavour symmetric model within a minimal seesaw framework resulting in mass matrices that leads to TM1 mixing. Minimal seesaw is realized by adding two right-handed neutrinos to the… Expand

#### References

SHOWING 1-10 OF 69 REFERENCES

Flavor effects in leptogenesis

- Physics
- 2017

Flavor effects can have a significant impact on the final estimate of the lepton (and therefore baryon) asymmetry in scenarios of leptogenesis. It is therefore necessary to account fully for this… Expand

Three-flavored nonresonant leptogenesis at intermediate scales.

- Physics
- 2018

Leptogenesis can successfully explain the matter-antimatter asymmetry via out-of-equilibrium decays of heavy Majorana neutrinos in the early Universe. In this article, we focus on nonresonant thermal… Expand

Spectator Effects during Leptogenesis in the Strong Washout Regime

- Physics
- 2014

By including spectator fields into the Boltzmann equations for Leptogenesis, we show that partially equilibrated spectator interactions can have a significant impact on the freeze-out value of the… Expand

A cosmological pathway to testable leptogenesis

- Physics
- 2018

Leptogenesis could have occurred at temperatures much lower than generally thought, if the cosmological history of the Universe underwent a period of accelerated expansion, as is predicted for… Expand

The importance of flavor in leptogenesis

- Physics
- 2006

We study leptogenesis from the out-of-equilibrium decays of the lightest heavy neutrino N1 in the medium (low) temperature regime, T1012 GeV (109 GeV), where the rates of processes mediated by the τ… Expand

Resonant enhancement in leptogenesis

- Physics
- 2017

Vanilla leptogenesis within the type I seesaw framework requires the mass scale of the right-handed neutrinos to be above 109 GeV. This lower bound can be avoided if at least two of the sterile… Expand

Leptogenesis with heavy neutrino flavours: from density matrix to Boltzmann equations

- Physics
- 2011

Leptogenesis with heavy neutrino flavours is discussed within a density matrix formalism. We write the density matrix equation, describing the generation of the matter-antimatter asymmetry, for an… Expand

Relativistic and spectator effects in leptogenesis with heavy sterile neutrinos

- Physics
- 2019

For leptogenesis with heavy sterile neutrinos above the electroweak scale, asymmetries produced at early times (in the relativistic regime) are relevant, if they are protected from washout. This can… Expand

Lepton asymmetry rate from quantum field theory: NLO in the hierarchical limit

- Physics
- 2017

The rates for generating a matter-antimatter asymmetry in extensions of the Standard Model (SM) containing right-handed neutrinos are the most interesting and least trivial coefficients in the rate… Expand

On leptogenesis, flavour effects and the low energy neutrino parameters

- Physics
- 2012

Contemporary physics is testing the boundaries of one of its existent paradigms, the Standard Model of Particle Physics. In recent years many attempts have been made in order to overcome the… Expand