Combining CPT-conjugate Neutrino channels at Fermilab

TL;DR

This paper proposes using CPT-conjugate neutrino channels at Fermilab to determine the neutrino mass hierarchy, leveraging future neutrino facilities and specific experimental setups to improve sensitivity.

Contribution

It introduces a novel approach combining CPT-conjugate channels with future Fermilab facilities to enhance neutrino mass hierarchy determination.

Findings

Can determine the neutrino mass hierarchy for sin^2(2θ_13) ≈ 0.02

Uses CPT-conjugate channels with comparable E/L for improved analysis

Explores various accelerator scenarios for betabeam neutrino fluxes

Abstract

We explore an alternative strategy to determine the neutrino mass hierarchy by making use of possible future neutrino facilities at Fermilab. Here, we use CPT-conjugate neutrino channels, exploiting a nu_mu beam from the NuMI beamline and a barnu_e beam from a betabeam experimental setup. Both experiments are performed at approximately the same E/L. We present different possible accelerator scenarios for the betabeam neutrino setup and fluxes. This CPT-conjugate neutrino channel scenario can extract the neutrino mass hierarchy down to sin^2 (2 theta_13) \approx 0.02.