Study of the ultrahigh-energy primary-cosmic-ray composition with the MACRO experiment
- Ahlen S.
- Ambrosio M.
- Antolini R.
- Auriemma G.
- Baldini A.
- Bam B. B.
- Barbarino G. C.
- Barish B. C.
- Battistom 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 F.
- Chiarella V.
- Chiera C.
- Cobis A.
- Cormack R.
- Corona A.
- Coutu S.
- DeCataldo G.
- DeMarzo C.
- De Vincenzi M.
- Di Credico 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 J. T.
- 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 M. J.
- Ludlam G.
- Mancarella G.
- Mandrioli G.
- Margiotta-Neri A.
- Marin A.
- Marini A.
- Martello D.
- Martellotti G.
- Chiesa A. M.
- Masera M.
- Matteuzzi P.
- Michael D. G.
- 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 C. W.
- Petrakis J.
- Petrera S.
- Pignatano N. D.
- Pistilli P.
- Predieri F.
- Ramello L.
- Reynoldson J.
- Ronga F.
- Rosa G.
- Satriano C.
- Satta L.
- Scapparone E.
- Scholberg K.
- Sciubba A.
- Lugaresi P. S.
- Severi M.
- Sitta M.
- Spinelli P.
- Spinetti M.
- Spurio M.
- Steele J.
- Steinberg R.
- Stone J. L.
- Sulak L. R.
- Surdo A.
- Tarle G.
- Togo V.
- Valente V.
- Verdone G. R.
- Walter C. W.
- Webb R.
- Worstell W.
DOIAbstract
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 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 pre...
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