Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 34: Neutrino physics 5

T 34.6: Talk

Tuesday, March 5, 2024, 17:15–17:30, Geb. 30.22: Gaede-HS

DUNE-PRISM: An innovative technique for neutrino oscillation analysis — •Ioana Caracas — JGU Mainz, Mainz, Germany

The Deep Underground Neutrino Experiment (DUNE) will measure the neutrino and anti-neutrinto oscillation probabilities, using a high-intensity neutrino beam produced at Fermilab. With a baseline of 1300 km and large (kton) LArTPC detectors, DUNE will provide an unprecedented precision in measuring the oscillation parameters. The neutrino interaction cross sections represent the main systematic source entering the analysis. Constraining the oscillation parameters space is therefore limited by a good knowledge of the neutrino interaction modeling.

The DUNE Near Detector (ND) complex is designed to move to different positions along the neutrino beam axis. Several neutrino fluxes with different peak energies can thus be sampled as a function of the off-axis position. These ND off-axis results can then be linearly combined in order to match any target spectrum using a data-driven approach. This innovative technique, the Precision Reaction Independent Spectrum Measurement (PRISM), is able to predict the Far Detector (FD) neutrino oscillated spectrum with minimum modeling dependency. The PRISM prediction obtained and the impact of several systematics on the resultant oscillation parameters will be discussed. A case-study showing how PRISM can avoid potential biases resulting from the wrong interaction modeling will also be presented.

Keywords: DUNE; neutrino; oscillation; PRISM; off-axis