Active Galactic Nuclei: Sources for ultra high energy cosmic rays? (2008)
Biermann, P. L., Becker, J. K., Caramete, L., Engel, R., Falcke, H., Gergely, L. A., ...
The origin of ultra high energy cosmic rays promises to lead us to a deeper understanding of the structure of matter, through the study of particle collisions at center-of-mass energies in...
Allard, D., Armengaud, E., Aublin, J., Beau, T., Berat, C., Billoir, P., ...
The surface detector array of the Pierre Auger Observatory is sensitive to Earth-skimming tau-neutrinos $\nu_\tau$ that interact in the Earth's crust. Tau leptons from $\nu_\tau$ charged-current...
Allard, D., Armengaud, E., Aublin, J., Beau, T., Berat, C., Billoir, P., ...
The surface detector array of the Pierre Auger Observatory is sensitive to Earth-skimming tau-neutrinos $\nu_\tau$ that interact in the Earth's crust. Tau leptons from $\nu_\tau$ charged-current...
Allard, D., Armengaud, E., Aublin, J., Beau, T., Berat, C., Billoir, P., ...
The surface detector array of the Pierre Auger Observatory is sensitive to Earth-skimming tau-neutrinos $\nu_\tau$ that interact in the Earth's crust. Tau leptons from $\nu_\tau$ charged-current...
Huege, T., Ulrich, R., Engel, R.
Based on CORSIKA and REAS2 simulations, we investigate the dependence of geosynchrotron radio emission from extensive air showers on the energy of the primary cosmic ray and the depth of the shower...
Report from the NA61/SHINE experiment at the CERN SPS (2008)
Abgrall, N, Aduszkiewicz, A, Andrieu, B, Anticic, T, Antoniou, N, Asryan, A, ...
The physics program of the NA61/SHINE (SHINE = SPS Heavy Ion and Neutrino Experiment) experiment at the CERN SPS consists of three subjects. In the first stage of data taking (2007-2008) the...
Applying Shower Development Universality to KASCADE Data (2008)
Apel, W. D., Badea, A. F., Bekk, K., Bluemer, J., Boos, E., Bozdog, H., ...
On basis of the theorem of a universal shower development stating that a hadronically generated extensive air shower is completely described by the primary energy, the position of the shower maximum...
Catanesi, M G, Radicioni, E, Edgecock, R, Ellis, M, Robbins, S, Soler, F J P, ...
The results of the measurements of the double-differential production cross-sections of pions, d^2 sigma pi / dpdOmega, in p-C and pi^pm- -C interactions using the forward spectrometer of the HARP...
Catanesi, M G, Radicioni, E, Edgecock, R, Ellis, M, Robbins, S, Soler, F J P, ...
The results of the measurements of the double-differential production cross-sections of pions, d^2 sigma pi / dpdOmega, in p-C and pi^pm- -C interactions using the forward spectrometer of the HARP...
Latest Results from the Air Shower Simulation Programs CORSIKA and CONEX (2008)
Pierog, T., Engel, R., Heck, D., Ostapchenko, S., Werner, K.
Interpretation of EAS measurements strongly depends on detailed air shower simulations. The uncertainty in the prediction of shower observables for different primary particles and energies is...
Altitude dependence of fluorescence light emission by extensive air showers (2008)
Keilhauer, B., Bluemer, J., Engel, R., Klages, H. O.
Fluorescence light is induced by extensive air showers while developing in the Earth's atmosphere. The number of emitted fluorescence photons depends on the conditions of the air and on the energy...
Unger, M., Dawson, B. R., Engel, R., Schüssler, F., Ulrich, R.
We present a new method for the reconstruction of the longitudinal profile of extensive air showers induced by ultra-high energy cosmic rays. In contrast to the typically considered shower size...
Heavy-ion collisions at the LHC-Last call for predictions (2008)
Armesto, N., Borghini, N., Jeon, S., Wiedemann, U. A., Abreu, S., Akkelin, S. V., ...
This writeup is a compilation of the predictions for the forthcoming Heavy Ion Program at the Large Hadron Collider, as presented at the CERN Theory Institute 'Heavy Ion Collisions at the LHC - Last...
Distributed File Management in AstroGrid-D (2008)
Breitling, F., Bruesemeister, T., Carlson, A., Engel, R., Enke, H., Hoegqvist, M., ...
Bartels, J., Borras, K., Diehl, M., Jung, H., Abramowicz, H., Albacete, J., ...
Proceedings of the 12th International Conference on Elastic and Diffractive Scattering (Blois Workshop) - Forward Physics and QCD
Heavy Ion Collisions at the LHC - Last Call for Predictions (2007)
Abreu, S., Akkelin, S. V., Alam, J., Albacete, J. L., Andronic, A., Antonov, D., ...
This writeup is a compilation of the predictions for the forthcoming Heavy Ion Program at the Large Hadron Collider, as presented at the CERN Theory Institute 'Heavy Ion Collisions at the LHC - Last...
Energy and composition sensitivity of geosynchrotron radio emission from EAS (2007)
Huege, T., Ulrich, R., Engel, R.
We analyse the sensitivity of geosynchrotron radio emission from inclined extensive air showers to the energy and mass of primary cosmic rays. We demonstrate that radio emission measurements at...
REAS2: CORSIKA-based Monte Carlo simulations of geosynchrotron radio emission (2007)
Huege, T., Ulrich, R., Engel, R.
Simulations of geosynchrotron radio emission from extensive air showers performed with the Monte Carlo code REAS1 used analytical parameterisations to describe the spatial, temporal, energy and...
Bopp, F. W., Engel, R., Ranft, J., Roesler, S.
A sizable component of stopped baryons is predicted for pp and P bP b collisions at LHC. Based on an analysis of RHIC data within framework of our multichain Monte Carlo DPMJET-III the LHC...
Inclusive distributions at the LHC as predicted from the DPMJET-III model with chain fusion (2007)
Ranft, J., Bopp, F. W., Engel, R., Roesler, S.
DPMJET-III with chain fusion is used to calculate inclusive distributions of Pb-Pb collisions at LHC energies. We present rapidity distributions as well as scaled multiplicities at mid-rapidity as...
Ulrich, R., Blümer, J., Engel, R., Schüssler, F., Unger, M.
The current status and prospects of deducing the proton-air cross section from fluorescence telescope measurements of extensive air showers are discussed. As it is not possible to observe the point...
Longitudinal Shower Profile Reconstruction from Fluorescence and Cherenkov Light (2007)
Unger, M., Engel, R., Schüssler, F., Ulrich, R.
Traditionally, longitudinal shower profiles are reconstructed in fluorescence light experiments by treating the Cherenkov light contribution as background. Here we will argue that, due to...
Anisotropy studies around the galactic centre at EeV energies with the Auger Observatory (2007)
Abraham, J., Aglietta, M., Aguirre, C., Allard, D., Allekotte, I., Allison, P., ...
Data from the Pierre Auger Observatory are analyzed to search for anisotropies near the direction of the Galactic Centre at EeV energies. The exposure of the surface array in this part of the sky is...
Photoproduction at collider energies: from RHIC and HERA to the LHC (2007)
Baltz, A, Baur, G, Brodsky, S J, D'Enterria, D G, Dreyer, U, Engel, R, ...
We present the mini-proceedings of the workshop on ``Photoproduction at collider energies: from RHIC and HERA to the LHC'' held at the European Centre for Theoretical Studies in Nuclear Physics and...
Photoproduction at collider energies: from RHIC and HERA to the LHC (2007)
Baltz, A., Baur, G., Brodsky, S. J., D'Enterria, David, Dreyer, U., Engel, R., ...
We present the mini-proceedings of the workshop on ``Photoproduction at collider energies: from RHIC and HERA to the LHC'' held at the European Centre for Theoretical Studies in Nuclear Physics and...
One-dimensional Hybrid Approach to Extensive Air Shower Simulation (2007)
Bergmann, T., Engel, R., Heck, D., Kalmykov, N.N., Ostapchenko, S., Pierog, T., ...
An efficient scheme for one-dimensional extensive air shower simulation and its implementation in the program CONEX are presented. Explicit Monte Carlo simulation of the high-energy part of hadronic...
Catanesi, M G, Ammosov, V, Apollonio, M, Arce, P, Artamonov, A, Bagulya, A, ...
The double-differential production cross-section of positive pions, $d^2\sigma^{\pi^{+}}/dpd\Omega$, measured in the HARP experiment is presented. The incident particles are 8.9 \GeVc protons...
Abraham, J., Aglietta, M., Aguirre, C., Allard, D., Allekotte, I., Allison, P., ...
An upper limit of 16% (at 95% c.l.) is derived for the photon fraction in cosmic rays with energies greater than $10^{19}$ eV, based on observations of the depth of shower maximum performed with the...
Hadronic photon interactions at high energies (2007)
Bopp, F. W., Engel, R., Rostovtsev, A.
A simple phenomenological introduction to the physics of multi-pomeron exchange amplitudes in connection with the Abramovski-Gribov-Kancheli (AGK) cutting rules is given. The AGK cutting rules are...
Aker, J.C.M., Hesselink, R., Engel, R., Borst, J.W.
The Arabidopsis (Arabidopsis thaliana) AAA ATPase CDC48A was fused to cerulean fluorescent protein and yellow fluorescent protein. AAA ATPases like CDC48 are only active in hexameric form. Förster...
New p+C data in fixed target experiments and the muon component in extensive air showers (2006)
Meurer, C, Bluemer, J, Engel, R, Haungs, A, Roth, M
The interpretation of extensive air shower (EAS) measurements is strongly dependent on the hadronic interaction models used for simulating reference showers. We study the importance of low-energy...
New p+C data in fixed target experiments and the muon component in extensive air showers (2006)
Meurer, Christine, Bluemer, J., Engel, R., Haungs, A., Roth, M., Collaboration, The HARP
The interpretation of extensive air shower (EAS) measurements is strongly dependent on the hadronic interaction models used for simulating reference showers. We study the importance of low-energy...
Radio detection of cosmic rays with LOPES (LOPES Collaboration) (2006)
Grupen,C., Apel,W.D., Asch,T., Badea,A.F., Bähren,L., Bekk,K., ...
Data taken with a radio antenna array in combination with the ground-level air shower experiment KASCADE-Grande at the Forschungszentrum Karlsruhe open up the possibility to measure large extensive...
Monte Carlo simulations of geosynchrotron radio emission from CORSIKA-simulated air showers (2006)
Huege, T., Ulrich, R., Engel, R.
We present simulations performed with REAS2, a new Monte Carlo code for the calculation of geosynchrotron radio emission from extensive air showers. The code uses thoroughly tested time-domain radio...
Geosynchrotron radio emission from CORSIKA-simulated air showers (2006)
Huege, T., Ulrich, R., Engel, R.
Simulations of radio emission from extensive air showers we have published so far were performed with a Monte Carlo code using analytical parametrisations to describe the spatial, temporal, energy...
12th International Conference on Elastic and Diffractive Scattering : Forward Physics and QCD (2006)
Bartels, J, Borras, K, Diehl, M, Jung, H, Abramowicz, H, Albacete, J, ...
Homola, P., Risse, M., Engel, R., Gora, D., Pekala, J., Wilczynska, B., ...
Cosmic-ray photons above 10^19 eV can convert in the geomagnetic field and initiate a preshower, i.e. a particle cascade before entering the atmosphere. We compare the preshower characteristics at...
One-dimensional Hybrid Approach to Extensive Air Shower Simulation (2006)
Bergmann, T., Engel, R., Heck, D., Kalmykov, N. N., Ostapchenko, S., Pierog, T., ...
An efficient scheme for one-dimensional extensive air shower simulation and its implementation in the program CONEX are presented. Explicit Monte Carlo simulation of the high-energy part of hadronic...
Impact of Uncertainties in Hadron Production on Air-Shower Predictions (2006)
Pierog, T., Engel, R., Heck, D.
At high energy, cosmic rays can only be studied by measuring the extensive air showers they produce in the atmosphere of the Earth. Although the main features of air showers can be understood within...
Spectral characterization of Dictyostelium autofluorescence. (2006)
Dictyostelium discoideum is used extensively as a model organism for the study of chemotaxis. In recent years, an increasing number of studies of Dictyostelium chemotaxis have made use of...
Muon production in extensive air showers and its relation to hadronic interactions (2005)
Meurer, C., Bluemer, J., Engel, R., Haungs, A., Roth, M.
In this work, the relation between muon production in extensive air showers and features of hadronic multiparticle production at low energies is studied. Using CORSIKA, we determine typical energies...
Photon air showers at ultra-high energy and the photonuclear cross-section (2005)
Risse, M., Homola, P., Engel, R., Gora, D., Heck, D., Pekala, J., ...
Experimental conclusions from air shower observations on cosmic-ray photons above 10^19 eV are based on the comparison to detailed shower simulations. For the calculations, the photonuclear...
First Results of Fast One-dimensional Hybrid Simulation of EAS Using CONEX (2005)
Pierog, T., Alekseeva, M. K., Bergmann, T., Chernatkin, V., Engel, R., Heck, D., ...
A hybrid simulation code is developed that is suited for fast one-dimensional simulations of shower profiles, including fluctuations. It combines the Monte Carlo simulation of high energy...
Werner, K., Chernatkin, V., Engel, R., Kalmykov, N. N., Ostapchenko, S., Pierog, T.
We present an introductory lecture on general features of cosmic rays, for non-experts, and some recent developments concerning cascade equations for air shower developments.
Keilhauer, B., Bluemer, J., Engel, R., Klages, H. O.
Several experiments measure the fluorescence light produced by extensive air showers in the atmosphere. This light is converted into a longitudinal shower profile from which information on the...
Lateral width of shower image in the Auger fluorescence detector (2005)
Barbosa, H., De Souza, V., Dobrigkeit, C., Engel, R., Gora, D., Heck, D., ...
The impact of the lateral distribution of light in extensive air showers on the detection and reconstruction of shower profiles is investigated for the Auger fluorescence telescopes. Based on...
Keilhauer, B., Bluemer, J., Engel, R., Gora, D., Homola, P., Klages, H., ...
The dependence of atmospheric conditions on altitude and time have to be known at the site of an air shower experiment for accurate reconstruction of extensive air showers and their simulations. The...
Nerling, F., Bluemer, J., Engel, R., Unger, M.
The light signal measured by fluorescence telescopes receives - strongly depending on the shower geometry with respect to the detector - a non-negligible contribution from additionally produced...
Hadronic multiparticle production in extensive air showers and accelerator experiments (2005)
Meurer, C., Bluemer, J., Engel, R., Haungs, A., Roth, M.
Using CORSIKA for simulating extensive air showers, we study the relation between the shower characteristics and features of hadronic multiparticle production at low energies. We report about...
Nerling, F., Blümer, J., Engel, R., Risse, M.
The shower simulation code CORSIKA has been used to investigate the electron energy and angular distributions in high-energy showers. Based on the universality of both distributions, we develop an...
Gora, D., Engel, R., Heck, D., Homola, P., Klages, H., Pekala, J., ...
The light intensity distribution in a shower image and its implications to the primary energy reconstructed by the fluorescence technique are studied. Based on detailed CORSIKA energy deposit...
Bopp, F W, Ranft, J, Engel, R, Roesler, S
To understand baryon stopping we analyse the new RHIC data within the framework of the multichain Monte Carlo DPMJET-III. We restrict the present consideration to d-Au and p-p collisions.
Bopp, F. W., Ranft, J., Engel, R., Roesler, S.
To understand baryon stopping we analyse new RHIC and Fermilab data within the framework of the multichain Monte Carlo DPMJET-III. The present consideration is restricted to to hadron-hadron and d-Au...
Low-Energy Hadron Production Data and Current Status of CERN Measurements (2005)
Data on low-energy hadron production in collisions of nucleons, pions and kaons with light nuclei are needed for many astrophysical and accelerator applications. Modern simulations have reached a...
Upper limit on the photon fraction in highest-energy cosmic rays from AGASA data (2005)
Risse, M., Homola, P., Engel, R., Gora, D., Heck, D., Pekala, J., ...
A new method to derive an upper limit on photon primaries from small data sets of air showers is developed which accounts for shower properties varying with the primary energy and arrival direction....
Activation of soluble guanylyl cyclase at the leading edge during Dictyostelium chemotaxis (2005)
Veltman, D.M., Roelofs, J., Engel, R.
Dictyostelium contains two guanylyl cyclases, GCA, a 12-transmembrane enzyme, and sGC, a homologue of mammalian soluble adenylyl cyclase. sGC provides nearly all chemoattractant-stimulated cGMP...
Global analysis of fluorescence fluctuation data (2005)
Skakun, V.V., Hink, M.A., Digris, A.V., Engel, R., Novikov, E.G., Apanasovich, V.V., ...
Over the last decade the number of applications of fluorescence correlation spectroscopy (FCS) has grown rapidly. Here we describe the development and application of a software package, FCS Data...
Bosgraaf, L., Waijer, A., Engel, R., Wessels, D., Soll, D., ...
The regulation of cell polarity plays an important role in chemotaxis. Previously, two proteins termed GbpC and GbpD were identified in Dictyostelium, which contain RasGEF and cyclic nucleotide...