DPF 2011

Constraints on non-standard neutrino-matter interactions from MINOS

9 Aug 2011, 16:00

20m

550 (Rhode Island Convention Center)

Parallel contribution Neutrino Physics Neutrino Physics

Speaker

Zeynep Isvan (University of Pittsburgh)

Description

MINOS searches for neutrino oscillations using the disappearance of muon neutrinos between two detectors, over a baseline of 735 km. We recently reported the most precise measurement of neutrino oscillations in the atmospheric sector and the first tagged measurement of antineutrino oscillations. The neutrino mass splitting and mixing angle are measured to be $|\mathrm{\Delta }{m}^2|={2.32}_{-0.08}^{+0.12}\times {10}^{-3}e{V}^2$ and ${\sin }^{2}2\theta >0.90$ (90\% C.L.) for an exposure of $7.25\times {10}^{20}$ protons-on-target (PoT). Antineutrino oscillation parameters are measured as $\mathrm{\Delta }{\bar{m}}^2=({3.36}_{-0.40}^{+0.46}\text{(stat.)}\pm 0.06\text{(syst.)})\times {10}^{-3}e{V}^2$ and ${\sin }^2(2\bar{\theta })={0.86}_{-0.12}^{+0.11}\text{(stat.)}\pm 0.01\text{(syst.)}$ with an exposure of $1.7\times {10}^{20}$ PoT in NuMI antineutrino running mode. We use the apparent difference in neutrino and antineutrino oscillation parameters to constrain non-standard matter interactions which could occur during propagation through the Earth's crust to the far detector.

Presentation materials

Slides

isvan_minos_110809.pdf