First muon anti-neutrino disappearance oscillation results from T2K

TL;DR

This paper reports the first muon anti-neutrino disappearance results from T2K, measuring oscillation parameters that are consistent with previous neutrino mode and MINOS experiment findings.

Contribution

It provides the initial measurement of muon anti-neutrino oscillation parameters using T2K data, expanding the understanding of neutrino oscillations.

Findings

Measured $ar{ m{m}}_{32}^{2}$ as 2.33_{-0.23}^{+0.27} x 10^{-3} eV^2

Determined sin^2 $ar{ heta}_{23}$ as 0.515_{-0.095}^{+0.085}

Results are consistent with neutrino mode and MINOS measurements.

Abstract

This talk presented the first muon anti-neutrino disappearance analysis using data from the T2K anti-neutrino data taken in 2014 and up to March 12, 2015. The preliminary measured oscillation parameters, using $2.3\times 10^{20}$ protons on target, are $\Delta \bar{\rm{m}}_{32}^{2} = 2.33_{-0.23}^{+0.27} \times 10^{-3}~$eV$^{2}$, and sin$^{2} \bar{\theta}_{23} = 0.515_{-0.095}^{+0.085}$. These oscillation parameters are consistent with the neutrino mode, and with the measurements of the MINOS experiment.