New cross section determination for secondary cosmic ray electron and positrons

Discussion timeslot (ZOOM-Meeting): 16. July 2021 - 18:00
ZOOM-Meeting URL: https://icrc2021.desy.de/pf_access_abstracts
Corresponding Session: https://icrc2021-venue.desy.de/channel/Presenter-Forum-1-Evening-All-Categories/48
Abstract:
'The cosmic-ray fluxes of electrons and positrons ($e^{pm}$) are measured with high precision by the space-borne particle spectrometers AMS-02. To infer a precise interpretation of the dominant production process for $e^{pm}$ in our Galaxy, it is necessary to have a correct description of the secondary component, produced by the interaction of cosmic-ray proton and helium with the interstellar medium. We update the parametrization of the $e^{pm}$ cross sections in order to obtain a new estimate of the lepton secondary component flux of the cosmic radiation. In the light of new cross section measurements performed at collider experiments of p+p→$pi^{pm}$+X and p+p→$K^{pm}$+X, we update the parametrization of the cross sections for these processes and then compute the $e^{pm}$ ones from $pi^{pm}$ and $K^{pm}$ decays. We use for the first time in this field the $e^{pm}$ spectrum obtained from the muon decay computed till the next to leading order. By using pp, pHe and pC data we estimate the uncertainty on the Lorentz invariant cross section for p+He→$pi^{pm}$+X. The peculiarity of this work is the experiment based approach, that we adopt in order to obtain a better shape determination and a significant reduction of uncertainty of the current secondary cosmic ray $e^{pm}$ flux predictions.'

Authors: Luca Orusa
Co-Authors: Michael Korsmeier | MATTIA DI MAURO | Fiorenza Donato
Indico-ID: 197
Proceeding URL: https://pos.sissa.it/395/453