https://doi.org/10.1051/epjconf/201612501003
Recent results from the T2K experiment
Lancaster University, Bailrigg, Lancaster, United Kingdom, LA1 4YW
* e-mail: m.lawe@lancaster.ac.uk
Published online: 28 October 2016
T2K is a long-baseline neutrino oscillation experiment based in Japan. It was the first experiment to observe νe appearance in a
νμ beam, and has more recently produced the highest precision measurement of the oscillation parameter θ23 and has begun to probe the charge-parity violation phase δ. Using a νμ beam disappearance sample, T2K measures
sin2 θ23 = 0.514+0.055-0.056 and Δm232 = (2.51 ± 0.10)×10−3eV2/c4 assuming the normal mass hierarchy, and sin2 θ23 = 0.511±0.055 and Δm213 = (2.48 ± 0.10)×10−3eV2/c4 assuming the inverted mass hierarchy. A joint fit between νμ beam appearance and disappearance samples produces consistent results for sin2 θ23 and Δm232 whilst also excluding at 90% confidence level the regions δ = [0.15,0.83]π for the normal hierarchy and δ = [− 0.08,1.09]π. Using a 
beam disappearance sample, 
and 
, consistent with previous measurements and the T2K νμ sample.
© The Authors, published by EDP Sciences, 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
