ausblenden:
Schlagwörter:
High Energy Physics - Experiment, hep-ex,Nuclear Experiment, nucl-ex, Physics, Instrumentation and Detectors, physics.ins-det
Zusammenfassung:
The spectral shape of reactor antineutrinos measured in recent experiments
shows anomalies in comparison to neutrino reference spectra. New precision
measurements of the reactor neutrino spectra as well as more complete input in
nuclear data bases are needed to resolve the observed discrepancies between
models and experimental results. This article proposes the combination of
experiments at reactors which are highly enriched in ${}^{235}$U with
commercial reactors with typically lower enrichment to gain new insights into
the origin of the anomalous neutrino spectrum. The presented method clarifies,
if the spectral anomaly is either solely or not at all related to the predicted
${}^{235}$U spectrum. Considering the current improvements of the energy scale
uncertainty of present-day experiments, a significance of three sigma and above
can be reached. As an example, we discuss the option of a direct comparison of
the measured shape in the currently running Double Chooz near detector and the
upcoming Stereo experiment. A quantitative feasibility study emphasizes that a
precise understanding of the energy scale systematics is a crucial prerequisite
in recent and next generation experiments investigating the spectral anomaly.
