Prospects of Measuring Oscillated Decay-at-Rest Neutrinos at Long Baselines

Abstract

In addition to the next generation of beam-based neutrino experiments and their associated detectors, a number of intense, low-energy neutrino production sources from decays at rest will be in operation. In this work, we explore the physics opportunities with decay-at-rest neutrinos for complementary measurements of oscillation parameters at long baselines. The J-PARC Spallation Neutron Source, for example, will generate neutrinos from a variety of decay-at-rest (DAR) processes, specifically those of pions, muons, and kaons. Other proposed sources will produce large numbers of stopped pions and muons. We demonstrate the ability of the upcoming Hyper-Kamiokande experiment to detect the monochromatic kaon decay-at-rest neutrinos from J-PARC after they have travelled several hundred kilometers and undergone oscillations. This measurement will serve as a valuable cross-check in constraining our understanding of neutrino oscillations in a new regime of neutrino energy and baseline length. We also study the expected event rates from pion and muon DAR neutrinos in liquid Argon and water detectors and their sensitivities to to the CP violating phase ${\delta }_{\mathrm{CP}}$.

9 pages, 6 figures

References in corpus (5)

• Sterile neutrino search at NEOS Experiment
• Measurement of neutrino and antineutrino oscillations by the T2K experiment including a new additional sample of ${\nu }_e$ interactions at the far detector
• A New Method to Search for CP violation in the Neutrino Sector
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Cited by in corpus (6)

• Modeling quasielastic interactions of monoenergetic kaon decay-at-rest neutrinos
• First Measurement of Missing Energy Due to Nuclear Effects in Monoenergetic Neutrino Charged Current Interactions
• Microscopic and Macroscopic Effects in the Decoherence of Neutrino Oscillations
• Demonstration of new MeV-scale capabilities in large neutrino LArTPCs using ambient radiogenic and cosmogenic activity in MicroBooNE
• Improving CP Measurement with THEIA and Muon Decay at Rest
• Simulating low-energy neutrino interactions with MARLEY