Weekly seminars

Uncertainties of secondary antiproton production in cosmic rays

by Michael Korsmeier (University of Turin, Department of Physics)

Auditorium (LAPTh)



9 chemin de Bellevue 74940 Annecy

During the last decade, space-based experiments have drastically reduced the measurement uncertainty of cosmic-ray fluxes. Consequently, systematic uncertainties in the description of cosmic rays become more and more relevant. One important example is the production of secondary antiprotons in our Galaxy. I will give an overview about the current status of the production cross section for cosmic-ray antiprotons and its uncertainties. In cosmic-ray fits, these uncertainties are often neglected or described at an effective level by a covariance matrix. I will review this method and present an alternative approach: We perform a global fit which joins cosmic-ray data and measurements of the antiproton production cross section. By simultaneously fitting cosmic-ray propagation parameters and the parametrization of the antiproton production cross section, we marginalize over the cross section uncertainty. I will briefly discuss the impact on the extraction of cosmic-ray propagation parameters and the putative hint for DM in the antiproton spectrum.

Your browser is out of date!

Update your browser to view this website correctly. Update my browser now