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Dr Jiajie Ling (Sun Yat-sen University)
After three neutrino mixing angles and two independent neutrino mass squared differences have been measured, neutrino physics has entered the precision era. Neutrino mass hierarchy and CP violation phase are the two remaining important unknown properties which could be measured by next generation neutrino oscillation experiments. Jiangmen Underground Neutrino Observatory (JUNO) is constructing...
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Mr Omer Penek (IKP-2 Forschungszentrum Juelich)
The Borexino detector, located at the Laboratori Nazionali del Gran Sasso in Italy, is a liquid scintillator detector with a primary goal to measure solar neutrinos. The spectral fit of the energy spectrum has been performed for the first time in the whole energy range from 0.19 up to 2.93 MeV. This approach made it possible to obtain the fluxes of 7Be, pp, and pep solar neutrinos...
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Dr Igor Smirnov (Petersburg Nuclear Physics Institute (Russia))
A typical experiment in high energy physics is considered. The result of the experiment is assumed to be a histogram consisting of bins or channels with numbers of corresponding registered events. The expected background and expected signal shape or acceptance are measured in separate auxiliary experiments, or calculated by the Monte Carlo method with finite sample size, and hence with finite...
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Dr Eric Baussan (IPHC)
The large value of the last mixing angle of the PMNS mixing matrix measured by reactor experiments enable the search for CP violation in leptonic sector with a new generation of neutrino super beams. The ESSnuSB project proposes to use the European Spallation Source (ESS) based in Sweden to elaborate a high intensity neutrino super beam. The LINAC of this facility, under construction, will...
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Mr Konstantin Treskov (Joint Institute for Nuclear Research)
Statistical data analysis of modern experiments deals with large-scale models with hundreds of nuisance parameters. Direct application on statistical methods such as likelihood profiling, Bayesian methods and especially Feldman-Cousins procedure can lead to extensive numerical computations.
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In order to facilitate the growing need for flexible and high-performance analysis tools to deal... -
Steven Calvez (Colorado State University)
The NOvA long-baseline neutrino and anti-neutrino oscillation results, by the nature of the measurements, feature low event counts in both the appearance and disappearance channels. When the low event counts are combined with the form of the fits that are needed to describe PMNS mixing, physical boundaries develop and have the potential to skew the statistical behavior of extracted parameters...
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Mr Artur Sztuc (Imperial College London)
We present an update to a method for non-parametric, Bayesian neutrino event reconstruction for the Super-Kamiokande detector with the existing fiTQun event reconstruction framework, first reported at PhyStat-nu 2016 at the IPMU. Particle properties are determined in a way where the number of Cherenkov rings to be reconstructed, and therefore the number of parameters, is one of the unknowns....
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Liudmila Kolupaeva
NOvA is an experiment devoted to studying neutrino oscillations in the NuMI neutrino beam from FNAL (USA). It is a long-baseline experiment consisting of two functionally identical, finely granulated detectors which are separated by 810 km of Earth crust and sited at 14 mrad off the beam axis. By measuring the transition probabilities P($\nu_\mu \rightarrow \nu_e$) and P($\nu_\mu \rightarrow...
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Dr Pietro Vischia (Universite Catholique de Louvain (UCL) (BE))
Optimization problems in HEP often involve maximizing a measure of the sensitivity of the analysis to an hypothesis with respect to another; the latter is referred to as null hypothesis and in a frequentist framework is tested against the former, which is referred to as alternative hypothesis.
In most cases, it is desirable to fully compute the expected frequentist significance, accounting...
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Lukas Koch (Science and Technology Facilities Council)
The canonical way to make experimental neutrino-cross-section data available for comparison with different theories and other experiments is to unfold it.
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The aim of this is to remove the detector effects and efficiencies from the data to release distributions of variables of interest in "truth space".
Depending on the available data, the detector properties, and the variables of interest, it... -
Petra Van Mulders (Vrije Universiteit Brussel (BE))
We are in an era of precision measurements at the Large Hadron Collider. The precision that can be achieved on some of the measurements is limited however due to large systematic uncertainties. This paper introduces a new technique to reduce the systematic uncertainty by quantifying the systematic impact of single events and correlating it with event observables to identify parts of the phase...
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Davio Cianci (Columbia University)
SBNFit is a software framework designed for the purpose of performing simultaneous fits across data from multiple, correlated distributions. Although extremely modular and generic, an ideal application is the searches for new physics at the Short Baseline Neutrino (SBN) experimental program at Fermilab. SBN comprises three experiments: MicroBooNE, SBND, and ICARUS, each of which can perform...
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Birgit Neumair (Technical University of Munich (TUM))
The statistical issues related to the search for sterile neutrinos are reviewed with focus on short-baseline appearance and disappearance experiments. The sensitivities for limit setting and signal discovery are discussed along with their dependency on the experimental parameters, including the signal rate and the spectral shape. Our baseline analysis is built on a profile-likelihood test...
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Mr Stefano Roberto Soleti
MicroBooNE (the Micro Booster Neutrino Experiment) is a liquid argon time-projection chamber (LArTPC) experiment currently running at Fermilab, and is designed to study short-baseline neutrino physics. It aims to address the nature of the anomalous excess of low-energy electron-neutrino-like events observed by the previous MiniBooNE experiment. We will present the status of the low-energy...
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Raymond Hei-Man Tsang (Pacific Northwest National Laboratory)
Low-background experiments typically perform radioassay on detector construction materials, and use the resulting radioimpurity estimates to project experiment sensitivity. However, as the radiopurity of the materials improves and approaches the detection limit of the radioassay techniques, the radioimpurity concentration of the materials cannot be conclusively determined. Instead, only an...
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Julia Tena Vidal (University of Liverpool)
GENIE (http://www.genie-mc.org/) is one of the most used event generator for neutrino experiments. The collaboration has a continuous effort to improve its prediction by adding new models and tune them against data. For the future experiments, the description of single and double pion production is fundamental and yet there is not a single model that describes simultaneously resonant,...
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Mr Francis Bench (The University of Liverpool)
I report the results of a search for $\bar{\nu}_{\mu} \rightarrow \bar{\nu}_{e}$ oscillations at the T2K experiment in a 3-flavour framework. An exposure of $1.49 \times 10^{21}$ Protons On Target (POT) is used in $\nu$ mode and $1.63 \times 10^{21}$ POT in $\bar{\nu}$ mode; an increase of $46\%$ in the $\bar{\nu}$ exposure compared to results reported in June 2018.
Results are reported for a...
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