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Production of secondary particles and gamma rays in pp- and pA-interactions

Igor Moskalenko
Sergey S. Ostapchenko

Abstract:

The accuracy of calculation of production of secondary particles (electrons, positrons, antiprotons) and gamma rays in collisions of energetic cosmic ray particles with interstellar gas has become of primary importance given a number of excellent ongoing experiments (e.g., Fermi-LAT, PAMELA, AMS-02) and experiments of the near future (e.g., ISS-CREAM, CALET, NUCLEON). Relatively small but significant features in the measured spectra of secondaries may hint on a new astrophysical phenomenon or be the keys to understanding long-standing puzzles. Are these features of the true astrophysical origin or the result of our flawed description of the underlying processes? We revisit the production of secondary particles and gamma rays in hadronic interactions using the most advanced Monte Carlo generators, EPOS-LHC and QGSJET-II-04, tuned to all available accelerator data including LHC.