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18-19 June 2018
Fermilab, Wilson Hall
US/Central timezone

Long-baseline searches for sterile neutrinos using neutral current interactions in NOvA

Jun 19, 2018, 5:15 PM
15m
One West (Fermilab, Wilson Hall)

One West

Fermilab, Wilson Hall

Oral Presentation Long Baseline Neutrino Program

Speakers

Dr Jeremy Hewes (University of Cincinnati) Michael Wallbank (University of Cincinnati)

Description

This talk discusses an updated analysis of neutrino data from the NOvA experiment to search for sterile neutrino oscillations. NOvA consists of two functionally identical liquid scintillator detectors in Fermilab's NuMI neutrino beam: a 300 ton near detector at a 1km baseline, and a 14,000 ton far detector 810km away in Ash River, MN, 14.6 mrad off the beam's central axis. Sterile neutrino oscillations are constrained by searching for neutrino disappearance in neutral current interactions between the near and far detectors. A covariance matrix approach is utilised to cancel systematic uncertainties between the two detectors over a broad range of Δm^2_41 parameter space. This analysis uses neutrino data collected between February 2014 and February 2017, corresponding to an exposure equivalent to 8.85e20 protons on target. A summary is provided of methods and results, including limits on the sterile neutrino mixing parameters θ_24 and θ_34 as a function of Δm^2_41.

Primary authors

Dr Jeremy Hewes (University of Cincinnati) Michael Wallbank (University of Cincinnati)

Presentation Materials