1203.3971 (W. D. Apel et al.)

Experimental evidence for the sensitivity of the air-shower radio signal to the longitudinal shower development    [PDF]

W. D. Apel, J. C. Arteaga, L. Bähren, K. Bekk, M. Bertaina, P. L. Biermann, J. Blümer, H. Bozdog, I. M. Brancus, P. Buchholz, E. Cantoni, A. Chiavassa, K. Daumiller, V. de Souza, F. Di Pierro, P. Doll, R. Engel, H. Falcke, M. Finger, B. Fuchs, D. Fuhrmann, H. Gemmeke, C. Grupen, A. Haungs, D. Heck, J. R. Hörandel, A. Horneffer, D. Huber, T. Huege, P. G. Isar, K. -H. Kampert, D. Kang, O. Krömer, J. Kuijpers, K. Link, P. Luczak, M. Ludwig, H. J. Mathes, M. Melissas, C. Morello, J. Oehlschläger, N. Palmieri, T. Pierog, J. Rautenberg, H. Rebel, M. Roth, C. Rühle, A. Saftoiu, H. Schieler, A. Schmidt, F. G. Schröder, O. Sima, G. Toma, G. C. Trinchero, A. Weindl, J. Wochele, M. Wommer, J. Zabierowski, J. A. Zensus

We observe a correlation between the slope of radio lateral distributions, and the mean muon pseudorapidity of 59 individual cosmic-ray-air-shower events. The radio lateral distributions are measured with LOPES, a digital radio interferometer co-located with the multi-detector-air-shower array KASCADE-Grande, which includes a muon-tracking detector. The result proves experimentally that radio measurements are sensitive to the longitudinal development of cosmic-ray air-showers. This is one of the main prerequisites for using radio arrays for ultra-high-energy particle physics and astrophysics.

View original: http://arxiv.org/abs/1203.3971