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Electromagnetic Showers Beyond Shower Shapes (1806.05667v1)

Published 14 Jun 2018 in hep-ex

Abstract: Correctly identifying the nature and properties of outgoing particles from high energy collisions at the Large Hadron Collider is a crucial task for all aspects of data analysis. Classical calorimeter-based classification techniques rely on shower shapes -- observables that summarize the structure of the particle cascade that forms as the original particle propagates through the layers of material. This work compares shower shape-based methods with computer vision techniques that take advantage of lower level detector information. In a simplified calorimeter geometry, our DenseNet-based architecture matches or outperforms other methods on $e+$-$\gamma$ and $e+$-$\pi+$ classification tasks. In addition, we demonstrate that key kinematic properties can be inferred directly from the shower representation in image format.

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