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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Measurement of muon antineutrino oscillations with an accelerator-produced off-axis beam
AU - Abe, K.
AU - Andreopoulos, C.
AU - Antonova, M.
AU - Aoki, S.
AU - Ariga, A.
AU - Assylbekov, S.
AU - Autiero, D.
AU - Barbi, M.
AU - Barker, G. J.
AU - Barr, G.
AU - Bartet-Friburg, P.
AU - Batkiewicz, M.
AU - Bay, F.
AU - Berardi, V.
AU - Berkman, S.
AU - Bhadra, S.
AU - Blondel, A.
AU - Bolognesi, S.
AU - Bordoni, S.
AU - Brailsford, D.
AU - Bravar, A.
AU - Bronner, C.
AU - Avanzini, M. Buizza
AU - Calland, R. G.
AU - Cao, S.
AU - Rodríguez, J. Caravaca
AU - Castillo, R.
AU - Catanesi, M. G.
AU - Cervera, A.
AU - Cherdack, D.
AU - Chikuma, N.
AU - Christodoulou, G.
AU - Coleman, J.
AU - Collazuol, G.
AU - Cremonesi, L.
AU - Dabrowska, A.
AU - Rosa, G. De
AU - Dealtry, T.
AU - Denner, P. F.
AU - Finch, A. J.
AU - Grant, N.
AU - Knox, A.
AU - Kormos, L. L.
AU - Lamont, I.
AU - Lawe, M.
AU - Nowak, J.
AU - O'Keeffe, H. M.
AU - Ratoff, P. N.
AU - Shaw, D.
AU - Southwell, L.
AU - T2K Collaboration
N1 - 8 pages, 4 figures
PY - 2016/5/5
Y1 - 2016/5/5
N2 - T2K reports its first measurements of the parameters governing the disappearance of $\overline{\nu}_\mu$ in an off-axis beam due to flavour change induced by neutrino oscillations. The quasi-monochromatic $\overline{\nu}_\mu$ beam, produced with a peak energy of 0.6 GeV at J-PARC, is observed at the far detector Super-Kamiokande, 295 km away, where the $\overline{\nu}_\mu$ survival probability is expected to be minimal. Using a dataset corresponding to $4.01 \times 10^{20}$ protons on target, $34$ fully contained $\mu$-like events were observed. The best-fit oscillation parameters are: $\sin^2 (\overline{\theta}_{23}) = 0.45$ and $|\Delta\overline{m}^2_{32}| = 2.51 \times 10^{-3}$ eV$^2$ with 68% confidence intervals of 0.38 - 0.64 and 2.26 - 2.80 ($\times 10^{-3}$ eV$^2$) respectively. These world-leading results are in agreement with existing anti-neutrino parameter measurements and also with the $\nu_\mu$ disappearance parameters measured by T2K.
AB - T2K reports its first measurements of the parameters governing the disappearance of $\overline{\nu}_\mu$ in an off-axis beam due to flavour change induced by neutrino oscillations. The quasi-monochromatic $\overline{\nu}_\mu$ beam, produced with a peak energy of 0.6 GeV at J-PARC, is observed at the far detector Super-Kamiokande, 295 km away, where the $\overline{\nu}_\mu$ survival probability is expected to be minimal. Using a dataset corresponding to $4.01 \times 10^{20}$ protons on target, $34$ fully contained $\mu$-like events were observed. The best-fit oscillation parameters are: $\sin^2 (\overline{\theta}_{23}) = 0.45$ and $|\Delta\overline{m}^2_{32}| = 2.51 \times 10^{-3}$ eV$^2$ with 68% confidence intervals of 0.38 - 0.64 and 2.26 - 2.80 ($\times 10^{-3}$ eV$^2$) respectively. These world-leading results are in agreement with existing anti-neutrino parameter measurements and also with the $\nu_\mu$ disappearance parameters measured by T2K.
KW - hep-ex
U2 - 10.1103/PhysRevLett.116.181801
DO - 10.1103/PhysRevLett.116.181801
M3 - Journal article
VL - 116
JO - Physical review letters
JF - Physical review letters
SN - 1079-7114
IS - 18
M1 - 181801
ER -