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Evidence for muon neutrino oscillation in an accelerator-based experiment |
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| Authors: | Aliu E Andringa S Aoki S Argyriades J Asakura K Ashie R Berns H Bhang H Blondel A Borghi S Bouchez J Burguet-Castell J Casper D Cavata C Cervera A Cho K O Choi J H Dore U Espinal X Fechner M Fernandez E Fukuda Y Gomez-Cadenas J Gran R Hara T Hasegawa M Hasegawa T Hayashi K Hayato Y Helmer R L Hill J Hiraide K Hosaka J Ichikawa A K Iinuma M Ikeda A Inagaki T Ishida T Ishihara K Ishii T Ishitsuka M Itow Y Iwashita T Jang H I Jeon E J Jeong I S Joo K Jover G Jung C K Kajita T Kameda J Kaneyuki K Kato I Kearns E Kerr D Kim C O Khabibullin M Khotjantsev A Kielczewska D Kim J Y Kim S Kitching P |
| Affiliation: | Institut de Fisica d'Altes Energies, Universitat Autonoma de Barcelona, E-08193 Bellaterra (Barcelona), Spain. |
| Abstract: | We present results for nu(mu) oscillation in the KEK to Kamioka (K2K) long-baseline neutrino oscillation experiment. K2K uses an accelerator-produced nu(mu) beam with a mean energy of 1.3 GeV directed at the Super-Kamiokande detector. We observed the energy-dependent disappearance of nu(mu), which we presume have oscillated to nu(tau). The probability that we would observe these results if there is no neutrino oscillation is 0.0050% (4.0 sigma). |
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