First Constraints on the Complete Neutrino Mixing Matrix with a Sterile Neutrino
Publication information:
G.H. Collin, C.A. Argüelles, J.M. Conrad, and M.H. Shaevitz. 2016. “First Constraints on the Complete Neutrino Mixing Matrix With a Sterile Neutrino”. Phys. Rev. Letters 117 221801 (2016)
Abstract
Neutrino oscillation models involving one extra mass eigenstate beyond the standard three (3+1) are fit to global short baseline experimental data and the recent IceCube νμ+ν¯μ disappearance search result. We find a best fit of Δm241=1.75eV2 with Δχ2null−min (dof) of 50.61 (4). We find that the combined IceCube and short baseline data constrain θ34 to <80∘(<6∘) at 90\% C.L. for Δm241≈2(6) eV2, which is improved over present limits. Incorporating the IceCube information provides the first constraints on all entries of the 3+1 mixing matrix.