English

Recent results from T2K

High Energy Physics - Experiment 2019-08-14 v2

Abstract

The T2K long-baseline neutrino oscillation experiment has produced the first observation of νe\nu_{e} appearance and the most precise measurement of the mixing angle θ23\theta_{23} from 6.57×10206.57 \times 10^{20} protons-on-target (POT) of neutrino beam data. We present here the results of T2K antineutrino oscillation analyses searching for νˉe\bar{\nu}_{e} appearance and measuring the dominant oscillation parameters for νˉμ\bar{\nu}_{\mu} disappearance, including the results from the T2K near detector fit. Using 4.01×10204.01 \times 10^{20} POT of antineutrino beam data T2K measured sin2(θˉ23)=0.450.12+0.29\sin^{2}(\bar{\theta}_{23}) = 0.45^{+0.29}_{-0.12} and Δmˉ322=2.51±0.28×103(eV2)|\Delta \bar{m}^{2}_{32}| = 2.51\pm0.28 \times 10^{-3} (eV^{2}), consistent with previous existing νμ\nu_{\mu} and νˉμ\bar{\nu}_{\mu} disappearance measurements. From the same dataset 3 νˉe\bar{\nu}_{e} candidate events were selected at the far detector, which did not provide evidence either for or against the νˉe\bar{\nu}_{e} appearance hypothesis.

Keywords

Cite

@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

R2 v1 2026-06-22T14:17:16.736Z