Browsing NTNU Open by Author "Ostapchenko, Sergey"
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AAfrag: Interpolation routines for Monte Carlo results on secondary production in proton–proton, proton–nucleus and nucleus–nucleus interactions
Kachelriess, Michael; Moskalenko, Igor V.; Ostapchenko, Sergey (Journal article; Peer reviewed, 2019)We provide a compilation of predictions of the QGSJET-II-04m model for the production of secondary species (photons, neutrinos, electrons, positrons, and antinucleons) that are covering a wide range of energies of the beam ... -
Alternative coalescence model for deuteron, tritium, helium-3 and their antinuclei
Kachelriess, Michael; Ostapchenko, Sergey; Tjemsland, Jonas (Peer reviewed; Journal article, 2020)Antideuteron and antihelium nuclei have been proposed as a detection channel for dark matter annihilations and decays in the Milky Way, due to the low astrophysical background expected. To estimate both the signal for ... -
Formation models for cosmic ray antinuclei
Kachelriess, Michael; Ostapchenko, Sergey; Tjemsland, Jonas (Peer reviewed; Journal article, 2022)The expected low background of light antinuclei, such as antideuteron and antihelium-3, makes them ideal detection channels for exotic physics, such as dark matter annihilations. At the same time, their small binding ... -
High energy radiation from Centaurus A
Kachelriess, Michael; Ostapchenko, Sergey; Tomas, R (Journal article; Peer reviewed, 2009)We calculate, for the nearest active galactic nucleus (AGN), Centaurus A (Cen A), the flux of high-energy cosmic rays (CR) and of accompanying secondary photons and neutrinos expected from hadronic interactions in the ... -
New Calculation of Secondary Antiprotons in Cosmic Rays
Moskalenko, Igor V.; Jóhannesson, Gudlaugur; Kachelriess, Michael; Orlando, E; Ostapchenko, Sergey; Porter, T.A. (Peer reviewed; Journal article, 2016)A dramatic increase in the accuracy and statistics of space-borne cosmic ray (CR) measurements has yielded several breakthroughs over the last several years. The most puzzling is the rise in the positron fraction above 10 ... -
Nuclear coalescence and collective behaviour in small interacting systems
Kachelriess, Michael; Ostapchenko, Sergey; Tjemsland, Jonas (Peer reviewed; Journal article, 2022)The production of light nuclei in particle collisions can be described as the coalescence of nucleons into nuclei. In most coalescence models used in heavy ion collisions, the probability for coalescence is controlled ... -
Nuclear coalescence, collective behaviour and emission volume in small interacting systems
Kachelriess, Michael; Ostapchenko, Sergey (Peer reviewed; Journal article, 2022)The production of light nuclei and antinuclei in particle collisions can be described as the coalescence of final state nucleons that are close in phase space. In heavy ion collisions, it is usually assumed that the formation ... -
On the model-dependence of the relation between minimum-bias and inelastic proton-proton cross sections
Ostapchenko, Sergey (Peer reviewed; Journal article, 2011)The model-dependence of the relation between the inelastic and various minimum-bias proton–proton cross sections is analyzed, paying a special attention to the sensitivity of minimum-bias triggers to diffractive collisions. ... -
Revisiting cosmic ray antinuclei fluxes with a new coalescence model
Kachelriess, Michael; Ostapchenko, Sergey; Tjemsland, Jonas (Peer reviewed; Journal article, 2020)Antideuteron and antihelium nuclei have been proposed as promising detection channels for dark matter because of the low astrophysical backgrounds expected. To estimate both potential exotic contributions and their ...