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Dr Andreas Haungs (Karlsruhe Institute of Technology)01/08/2011, 14:00Cosmic rays above the kneeOralThe detection of high-energy cosmic rays above a few hundred TeV is realized by the observation of extensive air-showers. By using the multi-detector setup of KASCADE-Grande the energy spectrum, elemental composition, and anisotropies of high-energy cosmic rays in the energy range from below the knee up to 1 EeV are investigated. The most distinct feature of the spectrum, the ‘knee’, is...Go to contribution page
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Dr Hiroyuki Sagawa (ICRR, University of Tokyo)01/08/2011, 14:30Cosmic rays above the kneeOralThe Telescope Array (TA) Experiment is the largest experiment studying ultrahigh energy cosmic rays in the northern hemisphere. TA is a hybrid experiment, which means it consists of a large surface array of scintillation counters plus three fluorescence detectors overlooking the surface array. TA has been collecting data for about three years. Measurements of the spectrum and...Go to contribution page
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Maria Monasor Monasor (University of Chicago)01/08/2011, 15:00Cosmic rays above the kneeOralDue to its hybrid design, the Pierre Auger Observatory provides a variety of independent experimental observables for the study of the composition of ultra-high energy cosmic rays. Ground level measurements from the surface detector allow to define composition sensitive parameters while the fluorescence detector provide a direct observation of the depth of maximum development of the...Go to contribution page
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Prof. katsuaki kasahara (waseda university)01/08/2011, 16:00Cosmic rays above the kneeOralLHCf is an experiment at CERN LHC and is dedicated to measure photons and neutrons in the very forward region to calibrate M.C event generator. Cosmic ray research over 10^14 eV normally uses air shower observation technique which must employ M.C simulation to derive incident cosmic ray energy and species etc. Air shower development is governed by the energetic secondary particles...Go to contribution page
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Dr Sergey Ostapchenko (Norwegian University for Science and Technology (NTNU))01/08/2011, 16:20Cosmic rays above the kneeOralThe present status of high energy cosmic ray composition studies is discussed. In particular, the issue of the model-dependence of experimental results is addressed. The impact of recent LHC measurements on the interpretation of cosmic ray data is investigated.Go to contribution page
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Mr Denis Allard (APC)01/08/2011, 16:45Cosmic rays above the kneeOralI will review the recent results of the Pierre Auger Observatory on the arrival directions of ultrahigh-energy cosmic rays . I will present the latest salient results of the Pierre Auger Observatory, namely the current level of correlation between arrival directions of ultrahigh-energy air showers and the direction of nearby active galactic nuclei, the diffuse excess of events in the...Go to contribution page
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Mr Patrick Berghaus (Bartol Research Institute, University of Delaware)01/08/2011, 17:05Cosmic rays above the kneeOralIceCube is composed of the surface array IceTop and the volume detector InIce/DeepCore. This offers unique opportunities for cosmic-ray physics. One major objective is the measurement of cosmic-ray composition around and above the knee by correlating the electromagnetic content of air showers to the high-energy muon yield. Presented are first results from the surface array and from...Go to contribution page
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Prof. Peter Mészáros (Pennsylvania State University)01/08/2011, 17:30Cosmic rays above the kneeOralI will review the arguments on which a GRB origin of UHECR are based, including hypernovae-related models. I will discuss recent calculations as well as mention counterarguments and possible constraints.Go to contribution page
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Dr Kumiko Kotera (University of Chicago)01/08/2011, 18:00Cosmic rays above the kneeOralNewly-born magnetars are good candidates for the acceleration of ultrahigh energy cosmic rays (Blasi et al. 00, Arons 03). We discuss issues related to the production of ultrahigh energy heavy nuclei in newly-born magnetars, in light of the latest results of the Auger Observatory. Magnetars offer favorable sites for the injection of heavy nuclei (by stripping from the star surface or...Go to contribution page
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Andrey Saveliev (University of Hamburg)01/08/2011, 18:20Cosmic rays above the kneeOralAfter a general overview we discuss constraints on the size of Lorentz symmetry breaking terms resulting from comparing measured ultra-high energy cosmic ray spectra with theoretical predictions in the presence of Planck scale suppressed Lorentz Invariance Violation (LIV). Finally, we will discuss how LIV tests could become more sensitive in the future due to the anticipated progress in...Go to contribution page
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Dr Shunsaku Horiuchi (CCAPP, Ohio State University)01/08/2011, 18:40Cosmic rays above the kneeOralRecent results from the Pierre Auger Observatory show that the composition of ultra-high energy cosmic rays (UHECR) becomes increasingly heavier on average with energy. We discuss potential sources of UHECR in light of these results. In particular, we detail on how some models of GRBs naturally predict UHECRs that can even be dominate by very heavy nuclei beyond iron. We also discuss...Go to contribution page
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