We present the analysis of multiple-muon events collected with one supermodule (1013 h live time) and two supermodules (1195 h live time) of the MACRO detector at Gran Sasso, Italy. Multimuon rates are shown to be sensitive to primary-cosmic-ray energies between approximately 50 TeV and several thousand TeV. Experimental data are compared with the expected rates from two composition models: a light (i.e., proton-rich) and a heavy (i.e., Fe-rich) composition. The predictions are based on a Monte Carlo simulation of the hadronic interactions of cosmic-ray nuclei, followed by a detailed tracking of the muons through the rock and the experimental apparatus. The results show good sensitivity of the MACRO detector to primary composition. The data exhibit a preference towards the light composition model.

STUDY OF THE ULTRAHIGH-ENERGY PRIMARY-COSMIC-RAY COMPOSITION WITH THE MACRO EXPERIMENT

CEI, FABRIZIO;
1992

Abstract

We present the analysis of multiple-muon events collected with one supermodule (1013 h live time) and two supermodules (1195 h live time) of the MACRO detector at Gran Sasso, Italy. Multimuon rates are shown to be sensitive to primary-cosmic-ray energies between approximately 50 TeV and several thousand TeV. Experimental data are compared with the expected rates from two composition models: a light (i.e., proton-rich) and a heavy (i.e., Fe-rich) composition. The predictions are based on a Monte Carlo simulation of the hadronic interactions of cosmic-ray nuclei, followed by a detailed tracking of the muons through the rock and the experimental apparatus. The results show good sensitivity of the MACRO detector to primary composition. The data exhibit a preference towards the light composition model.
Ahlen, S; Ambrosio, M; Antolini, R; Auriemma, G; Baldini, A; Bam, Bb; Barbarino, Gc; Barish, Bc; Battistoni, G; Bellotti, R; Bemporad, C; Bernardini, P; Bilokon, H; Bisi, V; Bloise, C; Bussino, S; Cafagna, F; Calicchio, M; Campana, P; Campana, D; Carboni, M; Cecchini, S; Cei, Fabrizio; Chiarella, V; Chiera, C; Cobis, A; Cormack, R; Corona, A; Coutu, S; Decataldo, G; Demarzo, C; Devincenzi, M; Dicredico, A; Diehl, E; Erriquez, O; Favuzzi, C; Ficenec, D; Forti, C; Foti, L; Fusco, P; Giacomelli, G; Giannini, G; Giglietto, N; Giubellino, P; Grassi, M; Green, P; Grillo, A; Guarino, F; Gustavino, C; Habig, A; Heinz, R; Hong, Jt; Iarocci, E; Katsavounidis, E; Kearns, E; Klein, S; Kyriazopoulou, S; Lamanna, E; Lane, C; Lee, C; Levin, D; Lipari, P; Liu, G; Liu, R; Longo, Mj; Ludlam, G; Mancarella, G; Mandrioli, G; Margiottaneri, A; Marin, A; Marini, A; Martello, D; Martellotti, G; Chiesa, Am; Masera, M; Matteuzzi, P; Michael, Dg; Miller, L; Monacelli, P; Monteno, M; Mufson, S; Musser, J; Nutter, S; Okada, C; Osteria, G; Palamara, O; Parlati, S; Patera, V; Patrizii, L; Pazzi, R; Peck, Cw; Petrakis, J; Petrera, S; Pignatano, Nd; Pistilli, P; Predieri, F; Ramello, L; Reynoldson, J; Ronga, F; Rosa, G; Satriano, C; Satta, L; Scapparone, E; Scholberg, K; Sciubba, A; Lugaresi, Ps; Severi, M; Sitta, M; Spinelli, P; Spinetti, M; Spurio, M; Steele, J; Steinberg, R; Stone, Jl; Sulak, Lr; Surdo, A; Tarle, G; Togo, V; Valente, V; Verdone, Gr; Walter, Cw; Webb, R; Worstell, W.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/18044
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