Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session B12: Undergraduate Research I
10:45 AM–12:21 PM,
Saturday, April 13, 2019
Sheraton Room: Plaza Court 1
Sponsoring Units: APS SPS
Chair: Crystal Bailey, American Physical Society
Abstract: B12.00004 : Monte Carlo Computational Modeling of DANSS Short-Baseline Antineutrino Oscillation Experiment*
11:21 AM–11:33 AM
Lorien A MacEnulty
Lorien A MacEnulty
David J Ernst
Short-baseline neutrino oscillation experiments provide insight into the potential existence and behavior of the sterile neutrino. Among these experiments is the Detector of Antineutrinos based on Solid Scintillator (DANSS), located a mechanically variable 10.7 to 12.7 m underneath a commercial reactor core in Russia. We offer a reanalysis of the most recent DANSS results by computationally imitating experimental conditions, including a Monte Carlo integration across the reactor core and detector volumes and incorporation of the detector energy resolution. We validate DANSS’s χ2-function calculations and proposed allowed region indicating possible Δm142 and sin22θ14 combinations characteristic of a four-neutrino model. Discrepancies arose in use of a ratio of counting rates at the furthest and nearest baselines as the primary data set, a strategy eliminating contribution of the average theoretical flux. To compensate for geometric disparities, we propose a slight alteration of the Monte Carlo integration. With this new strategy, the implications of the DANSS experiment are found to be greatly enhanced, suggesting a larger disallowed region. Completion of the model provides best fit values of Δm142 and sin22θ14 associated with a minimized χ2.
*Research funded by NSF Grant 1560035.
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