The T2K long-baseline neutrino oscillation experiment has produced the first observation of νe appearance and the most precise measurement of the mixing angle θ23 from 6.57×1020 protons-on-target (POT) of neutrino beam data. We present here the results of T2K antineutrino oscillation analyses searching for νˉe appearance and measuring the dominant oscillation parameters for νˉμ disappearance, including the results from the T2K near detector fit. Using 4.01×1020 POT of antineutrino beam data T2K measured sin2(θˉ23)=0.45−0.12+0.29 and ∣Δmˉ322∣=2.51±0.28×10−3(eV2), consistent with previous existing νμ and νˉμ disappearance measurements. From the same dataset 3 νˉe candidate events were selected at the far detector, which did not provide evidence either for or against the νˉe appearance hypothesis.
@article{arxiv.1606.01217,
title = {Recent results from T2K},
author = {Mark Scott},
journal= {arXiv preprint arXiv:1606.01217},
year = {2019}
}
Comments
9 pages, 7 figures, contribution to the proceedings of Les Rencontres de Physique de la Vallee d'Aoste, La Thuile, Aosta Valley, Italy, March 6-12, 2016