Study of multi-muon bundles in cosmic ray showers detected with the DELPHI detector at LEP

The DELPHI detector at LEP has been used to measure multi-muon bundles originating from cosmic ray interactions with air. The cosmic events were recorded in “parasitic mode” between individual e +e − interactions and the total live time of this data taking is equivalent to 1.6 × 10 6 s. The DELPHI a...

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Veröffentlicht in:	Astroparticle physics 2007, Vol.28 (3), p.273-286
Hauptverfasser:	Albrecht, T., Allmendinger, T., Apel, W-D., Arnoud, Y., Ballestrero, A., Baroncelli, A., Battaglia, M., Begalli, M., Benvenuti, A., Bertrand, D., Botner, O., Bowcock, T.J.V., Buschbeck, B., Buschmann, P., Calvi, M., Cavallo, F., Chapkin, M., Chierici, R., Chudoba, J., Collins, P., Contri, R., Crennell, D., De Maria, N., Doroba, K., Garcia, C., Gavillet, Ph, Gomez-Ceballos, G., Goncalves, P., Haag, C., Hamacher, K., Haug, S., Hauler, F., Hennecke, M., Holt, P.J., Jarry, P., Jonsson, P., Jungermann, L., Kapusta, F., Katsanevas, S., Katsoufis, E., Kersevan, B.P., Kourkoumelis, C., Kouznetsov, O., Lipniacka, A., Lopes, J.H., MacNaughton, J., Mandl, F., Marechal, B., Marin, J-C., Mariotti, C., Martinez-Rivero, C., Mastroyiannopoulos, N., Matorras, F., Matteuzzi, C., Mc Nulty, R., Moenig, K., Monge, R., Murray, W., Myklebust, T., Nassiakou, M., Navarria, F., Onofre, A., Osterberg, K., Paganoni, M., Pape, L., Parodi, F., Parzefall, U., Passon, O., Perrotta, A., Petrolini, A., Pozdniakov, V., Rames, J., Reinhardt, R., Ridky, J., Ruhlmann-Kleider, V., Salmi, L., Sander, C., Sekulin, R., Siebel, M., Smadja, G., Sopczak, A., Spassov, T., Stocchi, A., Szczekowski, M., Szumlak, T., Tabarelli, T., Taffard, A.C., Tegenfeldt, F., Timmermans, J., Tome, B., Tyapkin, I.A., Van Eldik, J., van Remortel, N., Wahlen, H., Washbrook, A.J., Wicke, D., Wickens, J., Yushchenko, O., Zalewska, A., Zhuravlov, V.
Format:	Artikel
Sprache:	eng
Schlagworte:	Astrophysics Cosmic ray interactions Cosmic ray muons cosmic ray rnuons Cosmic rays Cosmology and Extra-Galactic Astrophysics Fysik High Energy Physics - Experiment NATURAL SCIENCES NATURVETENSKAP Physics Sciences of the Universe
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Zusammenfassung:	The DELPHI detector at LEP has been used to measure multi-muon bundles originating from cosmic ray interactions with air. The cosmic events were recorded in “parasitic mode” between individual e +e − interactions and the total live time of this data taking is equivalent to 1.6 × 10 6 s. The DELPHI apparatus is located about 100 m underground and the 84 metres rock overburden imposes a cutoff of about 52 GeV/c on muon momenta. The data from the large volume Hadron Calorimeter allowed the muon multiplicity of 54,201 events to be reconstructed. The resulting muon multiplicity distribution is compared with the prediction of the Monte Carlo simulation based on CORSIKA/QGSJET01. The model fails to describe the abundance of high multiplicity events. The impact of QGSJET internal parameters on the results is also studied.
ISSN:	0927-6505 1873-2852 1873-2852
DOI:	10.1016/j.astropartphys.2007.06.001