S
S. Ostapchenko
Researcher at Moscow State University
Publications - 7
Citations - 479
S. Ostapchenko is an academic researcher from Moscow State University. The author has contributed to research in topics: Monte Carlo method & Blazar. The author has an hindex of 7, co-authored 7 publications receiving 432 citations. Previous affiliations of S. Ostapchenko include Norwegian University of Science and Technology & Karlsruhe Institute of Technology.
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Nonlinear screening effects in high energy hadronic interactions
TL;DR: In this article, the authors treated nonlinear effects in hadronic interactions by means of enhanced Pomeron diagrams and showed that the contribution of semihard processes to the interaction eikonal contains a significant nonfactorizable part.
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ELMAG: A Monte Carlo simulation of electromagnetic cascades on the extragalactic background light and in magnetic fields
TL;DR: A Monte Carlo program for the simulation of electromagnetic cascades initiated by high-energy photons and electrons interacting with extragalactic background light (EBL) and results for deflections and time -delays relevant for the derivation of limits on the EGMF are presented.
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High-energy neutrino yields from astrophysical sources : Weakly magnetized sources
TL;DR: In this paper, the yield of high energy neutrinos produced in astrophysical sources for arbitrary interaction depths and magnetic field strengths was calculated for the SOPHIA model, taking into account energy loss processes like synchrotron radiation and diffusion of charged particles in turbulent magnetic fields.
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Enhanced Pomeron diagrams: Resummation of unitarity cuts
TL;DR: In this paper, unitarity cuts of enhanced Pomeron diagrams are analyzed in the framework of the Reggeon field theory, assuming the validity of the Abramovskii-Gribov-Kancheli cutting rules.
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AAfrag: Interpolation routines for Monte Carlo results on secondary production in proton-proton, proton-nucleus and nucleus-nucleus interactions
TL;DR: The current version of QGSJET-II-04m has an improved treatment of the production of secondary particles at low energies: the parameters of the hadronization procedure have been fine-tuned, based on a number of recent benchmark experimental data, notably, from the LHCf, LHCb, and NA61 experiments.