CERN Accelerating science

Published Articles
Title Antiproton production cross sections in cosmic rays
Author(s) Korsmeier, M (Turin U. ; INFN, Turin ; RWTH Aachen U.)
Publication 2018
Number of pages 4
In: 53rd Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, 10 - 17 Mar 2018, pp.427-430
Subject category Astrophysics and Astronomy ; Nuclear Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; LHCb
CERN SPS ; NA61
Abstract The cosmic-ray flux of antiprotons is measured with unprecedented accuracy bythe space-borne particle spectrometers AMS-02. Its interpretation requires acorrect description of the dominant production process for antiprotons in ourGalaxy, namely, the interaction of cosmic-ray proton and helium with theinterstellar medium. In the light of new cross section measurements by the NA61experiment of p+p¯p+Xp+p¯¯¯p+X and the first ever measurement of p+He¯p+Xp+He¯¯¯p+X by the LHCb experiment, we update the parametrization of proton-proton andproton-nucleon cross sections. By using pppp, ppHe and ppC data we estimate theuncertainty on the Lorentz invariant cross section for all relevant antiprotonproduction channels in the Galaxy. We use these new cross sectionparametrizations to compute the antiproton source term. The uncertainties on thetotal source term are up to ±20±20% at low energies. Since this exceeds theuncertainties on the antiproton flux which is measured by AMS-02 at an accuracyof 5%, we finally quantify the necessity of new data on antiproton productioncross sections, and pin down the kinematic parameter space which should becovered by future data.
Copyright/License publication: © 2018-2024 ARISF

Corresponding record in: Inspire


 Zapis kreiran 2021-02-10, zadnja izmjena 2021-05-11



  • Send to ScienceWise.info