16–19 Jun 2025
Dipartimento di Fisica
Europe/Brussels timezone

Precise relic abundance and photon spectra for general Neutralinos

19 Jun 2025, 14:45
15m
Aula C (Dipartimento di Fisica)

Aula C

Dipartimento di Fisica

Via Pietro Giuria 1 10100 Torino

Speaker

Stefan Lederer

Description

I will present a Mathematica code, to be made public in the near future, which computes Sommerfeld enhanced annihilation cross-sections to obtain relic densities for neutralino dark matter as well as semi-inclusive photon endpoint spectra up to $\mathcal{O}(1\%)$ corrections.
The main purpose of this tool is to provide reliable, state-of-the-art theory predictions in general, mixed MSSM models to be compared to experimental bounds on the dark matter energy density and indirect detection spectra.

The program can use the wide-spread SLHA file format as input and automatically computes necessary running couplings (2-loop), mass corrections (1-loop), Sommerfeld enhanced annihilation cross-sections (P-wave and $\mathcal{O}(v^2)$ S-wave) and the dark matter thermal relic abundance in an efficient manner. The annihilation cross-sections into exclusive final states are easily accessible and, for photon-spectra near the endpoint, also semi-inclusive results (including NLL electroweak Sudakov resummation) are available.


Code-related publications arXiv numbers:
2211.14341 (Sudakov resummation for photon spectra),
1611.00804 (wino-Higgsino mixed DM study),
1601.04718 (inclusion of one-loop mass splittings),
1411.6930 (pMSSM study),
1411.6924 (Sommerfeld treatment),
1303.0200 ($\mathcal{O}(v^2)$-SE annihilation),
1210.7928 (mixed neutralino and chargino annihilation)

Authors

Andrzej Hryczuk (NCJB Warsaw) Aoife Bharucha (CPT, Marseille) Martin Beneke (Technische Universität München) Pedro Ruiz-Femenía (Autonoma U. Madrid) Stefan Lederer Stefan Recksiegel (Technische Universität München)

Presentation materials