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Deep Neural Networks for Energy and Position Reconstruction in EXO-200

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arxiv 1804.09641 v2 pith:RA73MN6O submitted 2018-04-25 physics.ins-det hep-exnucl-ex

Deep Neural Networks for Energy and Position Reconstruction in EXO-200

classification physics.ins-det hep-exnucl-ex
keywords exo-200reconstructiondataexperimentaccuracyalgorithmsapproachescarlo
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We apply deep neural networks (DNN) to data from the EXO-200 experiment. In the studied cases, the DNN is able to reconstruct the relevant parameters - total energy and position - directly from raw digitized waveforms, with minimal exceptions. For the first time, the developed algorithms are evaluated on real detector calibration data. The accuracy of reconstruction either reaches or exceeds what was achieved by the conventional approaches developed by EXO-200 over the course of the experiment. Most existing DNN approaches to event reconstruction and classification in particle physics are trained on Monte Carlo simulated events. Such algorithms are inherently limited by the accuracy of the simulation. We describe a unique approach that, in an experiment such as EXO-200, allows to successfully perform certain reconstruction and analysis tasks by training the network on waveforms from experimental data, either reducing or eliminating the reliance on the Monte Carlo.

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