Final published version
Licence: CC BY
Research output: Contribution to Journal/Magazine › Conference article › peer-review
| Article number | 012018 |
|---|---|
| <mark>Journal publication date</mark> | 15/04/2015 |
| <mark>Journal</mark> | Journal of Physics: Conference Series |
| Issue number | 1 |
| Volume | 598 |
| Number of pages | 3 |
| Publication Status | Published |
| <mark>Original language</mark> | English |
| Event | 1st Prospects in Neutrino Physics Conference, NuPhys 2013 - London, United Kingdom Duration: 19/12/2013 → 20/12/2013 |
| Conference | 1st Prospects in Neutrino Physics Conference, NuPhys 2013 |
|---|---|
| Country/Territory | United Kingdom |
| City | London |
| Period | 19/12/13 → 20/12/13 |
The T2K experiment has observed the disappearance of muon neutrinos from the J-PARC muon-neutrino beam. Using data corresponding to 3.01 × 1020 protons on target, 58 muon neutrino event candidates were observed; 205 ± 17 (syst.) events are expected under the no-oscillation hypothesis. A fit to the observed rate and energy spectrum in a neutrino oscillation framework with three active neutrino flavours in constant density matter, assuming the normal mass hierarchy, yields a best fit mixing angle sin2 θ23 = 0.514 ± 0.082 and best fit mass squared splitting |Δm232| = 2.44+0.17-0.15 × 10-3 eV2/c4, which corresponds to the maximal disappearance probability.