Ponente
Descripción
Antimatter cosmic rays and gamma rays are powerful probes for indirect dark matter (DM) detection. In this talk, I will present the CosmiXs framework, which provides state-of-the-art predictions for the energy spectra of cosmic messengers—antiprotons, positrons, gamma rays, neutrinos, and antideuterons—produced from DM annihilation or decay. The spectra are calculated using the state-of-the-art Vincia shower algorithm implemented in Pythia, incorporating QED and QCD radiation, as well as full electroweak corrections with spin correlations and off-shell effects. In particular, CosmiXs implements a novel Wigner-based coalescence model for antideuterons using the Argonne v18 wavefunction, validated against ALEPH data at the Z pole. This approach eliminates free parameters associated with coalescence and demonstrates that coalescence-related uncertainties are no longer the dominant limitation in theoretical predictions for the antideuterons spectrum. All results are tabulated for DM masses from 5 GeV to 100 TeV and a broad set of final states, enabling precise flux predictions for upcoming cosmic-ray experiments.
