The final analysis of atmospheric neutrino events collected with the MACRO detector is presented. Three different classes of events, generated by neutrinos in different energy ranges, are studied looking at rates, angular distributions and estimated energies. The results are consistent for all the subsamples and indicate a flux deficit that depends on energy and path - length of neutrinos. The no - oscillation hypothesis is excluded at similar to 5sigma, while the hypothesis of nu(mu) --> nu(tau) oscillation gives a satisfactory description of all data. The parameters with highest probability in a two flavor scenario are sin(2) 2theta(m) = 1 and Deltam(2) = 0.0023 eV(2). This result is independent of the absolute normalization of the atmospheric neutrino fluxes. The data can also be used to put experimental constrain on this normalization.

Measurements of atmospheric muon neutrino oscillations, global analysis of the data collected with MACRO detector

CEI, FABRIZIO;NICOLO', DONATO;
2004-01-01

Abstract

The final analysis of atmospheric neutrino events collected with the MACRO detector is presented. Three different classes of events, generated by neutrinos in different energy ranges, are studied looking at rates, angular distributions and estimated energies. The results are consistent for all the subsamples and indicate a flux deficit that depends on energy and path - length of neutrinos. The no - oscillation hypothesis is excluded at similar to 5sigma, while the hypothesis of nu(mu) --> nu(tau) oscillation gives a satisfactory description of all data. The parameters with highest probability in a two flavor scenario are sin(2) 2theta(m) = 1 and Deltam(2) = 0.0023 eV(2). This result is independent of the absolute normalization of the atmospheric neutrino fluxes. The data can also be used to put experimental constrain on this normalization.
2004
Ambrosio, M; Antolini, R; Bakari, D; Baldini, A; Barbarino, Gc; Barish, Bc; Battistoni, G; Becherini, Y; Bellotti, R; Bemporad, C; Bernardini, P; Bilokon, H; Bloise, C; Bower, C; Brigida, M; Cafagna, F; Campana, D; Carboni, M; Cecchini, S; Cei, Fabrizio; Chiarella, V; Choudhary, Bc; Cosson, D; Coutu, S; De Cataldo, G; Dekhissi, H; De Marzo, C; De Mitri, I; Denni, U; Derkauoi, J; De Vincenzi, M; Di Credico, A; Favuzzi, C; Forti, C; Frani, A; Fusco, P; Giacomelli, G; Giannini, G; Giglietto, N; Giorgini, M; Grassi, M; Grillo, A; Guarino, F; Gustavino, C; Habig, A; Hanson, K; Heinz, R; Iarocci, E; Katsavounidis, E; Katsavounidis, I; Kearns, E; Kim, H; Kyriazopoulou, S; Lamanna, E; Lane, C; Levin, Ds; Lipari, P; Longo, Mj; Loparco, F; Maaroufi, F; Mancarella, G; Mandrioli, G; Manzoor, S; Margiotta, A; Marini, A; Martello, D; Marzari Chiesa, A; Mazziotta, Mn; Mengucci, A; Michael, Dg; Mikheyev, S; Monacelli, P; Montaruli, T; Monteno, M; Mufson, S; Musser, J; Nicolo', Donato; Nolty, R; Orth, C; Osteria, G; Palamara, O; Patera, V; Patrizii, L; Pazzi, R; Peck, Cw; Perrone, L; Petrera, S; Popa, V; Raino, A; Reynoldson, J; Ronga, F; Satriano, C; Scholberg, K; Sciubba, A; Sioli, M; Sitta, M; Spinelli, P; Spinetti, M; Spurio, M; Steinberg, R; Stone, Jl; Sulak, Lr; Surdo, A; Tarle, G; Togo, V; Vakili, M; Walter, Cw; Webb, R.
File in questo prodotto:
File Dimensione Formato  
MACRONuOsc2004.pdf

accesso aperto

Tipologia: Versione finale editoriale
Licenza: Creative commons
Dimensione 421.95 kB
Formato Adobe PDF
421.95 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/188290
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 152
  • ???jsp.display-item.citation.isi??? 137
social impact