arxiv: 1311.4750 · v2 · ★pith:3ASA3YIVnew · submitted 2013-11-19 · ✦ hep-ex
Observation of Electron Neutrino Appearance in a Muon Neutrino Beam
show 331 more authors
read the original abstract
The T2K experiment has observed electron neutrino appearance in a muon neutrino beam produced 295 km from the Super-Kamiokande detector with a peak energy of 0.6 GeV. A total of 28 electron neutrino events were detected with an energy distribution consistent with an appearance signal, corresponding to a significance of 7.3$\sigma$ when compared to 4.92 $\pm$ 0.55 expected background events. In the PMNS mixing model, the electron neutrino appearance signal depends on several parameters including three mixing angles $\theta_{12}$, $\theta_{23}$, $\theta_{13}$, a mass difference $\Delta m^2_{32}$ and a CP violating phase $\delta_{\mathrm{CP}}$. In this neutrino oscillation scenario, assuming $|\Delta m^2_{32}| = 2.4 \times 10^{-3}$ $\rm eV^2$, $\sin^2 \theta_{23} = 0.5$, and $\Delta m^2_{32} >0$ ($\Delta m^2_{32} <0$), a best-fit value of $\sin^2 2 \theta_{13}$ = $0.140^{+0.038}_{-0.032}$ ($0.170^{+0.045}_{-0.037}$) is obtained at $\delta_{\mathrm{CP}}=0$. When combining the result with the current best knowledge of oscillation parameters including the world average value of $\theta_{13}$ from reactor experiments, some values of $\delta_{\mathrm{CP}}$ are disfavored at the 90% CL.
This paper has not been read by Pith yet.
Forward citations
Cited by 3 Pith papers
Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.
-
Mass-Varying Neutrinos from an Inverse Symmetron
astro-ph.CO 2026-06 unverdicted novelty 5.0
An inverse symmetron model for mass-varying neutrinos tames linear instabilities, suppresses matter power spectrum, and may address the Hubble tension via early dark energy around recombination.
-
Effects of tau-neutrino detection on non-standard interactions at DUNE with a short discussion on the nature of neutrino mixing
hep-ph 2025-03 unverdicted novelty 3.0
Simulations show that tau neutrino appearance at DUNE improves sensitivity to NSI parameters especially ε_μτ, hierarchy, CP violation, octant, NSI phases, and PMNS unitarity constraints.
-
Update on non-unitary mixing in the recent NO$\nu$A and T2K data
hep-ph 2024-12 unverdicted novelty 3.0
Analysis of recent NOνA and T2K data under non-unitary mixing yields tighter 90% limits on non-unitary parameters than prior data and indicates that α10 could reduce the 1σ tension between experiments for normal hierarchy.
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.