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Open AccessJournal ArticleDOI

Nonlinear screening effects in high energy hadronic interactions

S. Ostapchenko
- 28 Jul 2006 - 
- Vol. 74, Iss: 1, pp 014026
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TLDR
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.
Abstract
Nonlinear effects in hadronic interactions are treated by means of enhanced Pomeron diagrams, assuming that Pomeron-Pomeron coupling is dominated by soft partonic processes. It is shown that the approach allows to resolve a seeming contradiction between realistic parton momentum distributions, measured in deep inelastic scattering experiments, and the energy behavior of total proton-proton cross section. Also a general consistency with both soft and hard diffraction data is demonstrated. An important feature of the proposed scheme is that the contribution of semihard processes to the interaction eikonal contains a significant nonfactorizable part. On the other hand, the approach preserves the QCD factorization picture for inclusive high-${p}_{t}$ jet production.

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Design concepts for the Cherenkov Telescope Array CTA: An advanced facility for ground-based high-energy gamma-ray astronomy

Marcos Daniel Actis, +685 more
TL;DR: The ground-based gamma-ray astronomy has had a major breakthrough with the impressive results obtained using systems of imaging atmospheric Cherenkov telescopes as mentioned in this paper, which is an international initiative to build the next generation instrument, with a factor of 5-10 improvement in sensitivity in the 100 GeV-10 TeV range and the extension to energies well below 100GeV and above 100 TeV.
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Measurement of the energy spectrum of cosmic rays above 10(18) eV using the Pierre Auger Observatory

J. Abraham, +492 more
- 08 Mar 2010 - 
TL;DR: In this article, the authors reported a measurement of the flux of cosmic rays with unprecedented precision and statistics using the Pierre Auger Observatory based on fluorescence observations in coincidence with at least one surface detector.
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Cosmic ray interaction event generator SIBYLL 2.1

TL;DR: Sibyll 2.1 as mentioned in this paper is a version of Sibyll 1.7.1 that allows multiple soft interactions, introduction of new parton density functions, and improved treatment of diffraction.
Journal ArticleDOI

Cosmic rays from the knee to the highest energies

TL;DR: In this paper, a review summarizes recent developments in the understanding of high-energy cosmic rays focusing on galactic and presumably extragalactic particles in the energy range from the knee (1015 eV ) up to the highest energies observed ( > 10 20 eV).
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The Pierre Auger Observatory: Contributions to the 34th International Cosmic Ray Conference (ICRC 2015)

A. Aab, +450 more
TL;DR: Contributions of the Pierre Auger Collaboration to the 34th International Cosmic Ray Conference, 30 July - 6 August 2015, The Hague, The Netherlands as discussed by the authors, 30 July-6 August 2015
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