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Neutrino oscillation effects in Soudan 2 upward-stopping muons

2005; American Physical Society; Volume: 72; Issue: 5 Linguagem: Inglês

10.1103/physrevd.72.052005

1550-7998

W.W.M. Allison, G.J. Alner, D. S. Ayres, G. Barr, W. L. Barrett, P. Border, J.H. Cobb, D. J. A. Cockerill, H. Courant, D. M. DeMuth, T. Fields, H. Gallagher, M. C. Goodman, T. Kafka, S. M. S. Kasahara, P. J. Litchfield, W. A. Mann, M. L. Marshak, William H. Miller, L. Mualem, J. K. Nelson, A. Napier, W. P. Oliver, G.F. Pearce, E. A. Peterson, D. Petyt, K. Ruddick, M. C. Sánchez, J. Schneps, A. Sousa, J. L. Thron, N. West,

Particle physics theoretical and experimental studies

Upward-going stopping muons initiated by atmospheric νμ and ν¯μ interactions in the rock below the Soudan 2 detector have been isolated, together with a companion sample of neutrino-induced single muons, created within the detector, which travel downwards and exit. The downward-going sample is consistent with the atmospheric-neutrino flux prediction, but the upward-going sample exhibits a sizable depletion. Both are consistent with previously reported Soudan 2 neutrino-oscillation results. Inclusion of the two samples in an all-event likelihood analysis, using recent 3D-atmospheric-neutrino-flux calculations, reduces both the allowed oscillation parameter region and the probability of the no-oscillation hypothesis.7 MoreReceived 15 July 2005DOI:https://doi.org/10.1103/PhysRevD.72.052005©2005 American Physical Society