Missing energy and the measurement of the CP-violating phase in neutrino oscillations

Abstract

In the next generation of long-baseline neutrino oscillation experiments, aiming to determine the charge-parity violating phase ${\delta }_{CP}$ in the appearance channel, fine-grained time-projection chambers are expected to play an important role. In this Letter, we analyze an influence of realistic detector capabilities on the ${\delta }_{CP}$ sensitivity for a setup similar to that of the Deep Underground Neutrino Experiment. We find that the effect of the missing energy, carried out by undetected particles, is sizable. Although the reconstructed neutrino energy can be corrected for the missing energy, the accuracy of such procedure has to exceed 20\%, to avoid a sizable bias in the extracted ${\delta }_{CP}$ value.

6 pages, 2 figures. v2 matches the version published in PRD

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• Systematic uncertainties in long-baseline neutrino-oscillation experiments
• First Measurement of the Ar$(e,e^{\prime })X$ Cross Section at Jefferson Lab
• Lepton-Nucleus Cross Section Measurements for DUNE with the LDMX Detector
• Progress in measurements of 0.1--10 GeV neutrino-nucleus scattering and anticipated results from future experiments
• First Measurement of the Total Neutron Cross Section on Argon Between 100 and 800 MeV
• Quantifying multinucleon effect in Argon using high-pressure TPC
• Demonstration of new MeV-scale capabilities in large neutrino LArTPCs using ambient radiogenic and cosmogenic activity in MicroBooNE
• Nuclear Effects and CP Sensitivity at DUNE
• Neutrino Tagging, a new tool for accelerator based neutrino experiments
• Measurement of neutron production in atmospheric neutrino interactions at Super-Kamiokande
• Measurement of the Neutron Cross Section on Argon Between 95 and 720 MeV
• Measurement of the total neutron cross section on argon in the 20 to 70 keV energy range
• Calorimetric analysis for long-baseline neutrino experiments
• Uncertainties in neutrino oscillation parameter sensitivity due to resonance processes at NO$\nu$A
• Constraining nuclear effects in Argon using machine learning algorithms
• Prospects for neutrino oscillation parameters