The final results of the MACRO experiment on atmospheric neutrino oscillations are presented and discussed. The data concern different event topologies with average neutrino energies of ~3 and ~50 GeV. Multiple Coulomb scattering of the high-energy muons in absorbers was used to estimate the neutrino energy of each event. The angular distributions, the L/E distribution, the particle ratios, and the absolute fluxes all favor µ oscillations with maximal mixing and m2 = 0.0023 eV2. A discussion is made on the Monte Carlos used for the atmospheric neutrino flux. Some results on neutrino astrophysics are also briefly discussed.
New MACRO Results on Atmospheric Neutrino Oscillations / G. Giacomelli; A. Margiotta. - In: PHYSICS OF ATOMIC NUCLEI. - ISSN 1063-7788. - STAMPA. - 67:(2004), pp. 1139-1146. (Intervento presentato al convegno 4th International Conference on Nonaccelerator New Physics (NANP 03) tenutosi a Dubna, Russia nel 23-28 Jun 2003).
New MACRO Results on Atmospheric Neutrino Oscillations
GIACOMELLI, GIORGIO MARIA;MARGIOTTA, ANNARITA
2004
Abstract
The final results of the MACRO experiment on atmospheric neutrino oscillations are presented and discussed. The data concern different event topologies with average neutrino energies of ~3 and ~50 GeV. Multiple Coulomb scattering of the high-energy muons in absorbers was used to estimate the neutrino energy of each event. The angular distributions, the L/E distribution, the particle ratios, and the absolute fluxes all favor µ oscillations with maximal mixing and m2 = 0.0023 eV2. A discussion is made on the Monte Carlos used for the atmospheric neutrino flux. Some results on neutrino astrophysics are also briefly discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
