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- W2979891310 abstract "We study the prospects of detecting and characterising Dark Matter at colliders using Machine Learning (ML) techniques. We focus on the monojet and missing transverse energy (MET) channel and propose a set of benchmark models for the study: a typical WIMP Dark Matter candidate in the form of a SUSY neutralino, a pseudo-Goldstone impostor in the shape of an Axion-Like Particle, and a light Dark Matter impostor whose interactions are mediated by a heavy particle. All these benchmarks are tensioned against the main SM background ($Z$+jets) and against each other. Our analysis uses both the leading-order kinematic features as well as the information in additional hard jets. We use different representations of the data, from a simple event data sample with values of kinematic variables fed into a Logistic Regression algorithm or a Neural Network, to a transformation of the data into images related to probability distributions, fed to Deep and Convolutional Neural Networks. We also study the robustness of our method against including detector effects, dropping kinematic variables, or changing the number of events per image. In the case of signals with more combinatorial possibilities (events with more than one hard jet), the most crucial data features are selected by performing a Principal Component Analysis. We compare the performance of all these methods, and found that using the 2D images improves the performance significantly. We noticed that even when one considers only a few events per image, the classification accuracy is higher than using the NNs on the data in the form of event arrays." @default.
- W2979891310 created "2019-10-18" @default.
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- W2979891310 date "2019-10-14" @default.
- W2979891310 modified "2023-09-27" @default.
- W2979891310 title "WIMPs or else? Using Machine Learning to disentangle LHC signatures" @default.
- W2979891310 hasPublicationYear "2019" @default.
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