Muon Track Reconstruction in a Segmented Bolometric Array Using Multi-Objective Optimization

Abstract

Recent advances in segmented solid-state detector arrays for rare-event searches have allowed the technology to approach the ton-scale in detector mass and the scale of meters in size. Often focused around searches for neutrinoless double-beta decay or direct dark matter detection, such experiments also have the capability to search for exotic particles that leave track-like signatures across their volume. However, the segmented nature of such detector arrays often sets the spatial resolution and makes the problem of reconstructing track-like paths non-trivial. In this paper, we present an algorithm that improves reconstruction of track-like events in segmented detectors using multi-objective optimization - a computational technique that optimizes more than one cost function at a time without specifying a quantitative weighting between them. Such a technique allows the reconstruction of tracks through a detector and the determination of path-lengths through individual elements. When combined with the reconstructed energy depositions in each element this allows for a calculation of the stopping power of track-like particles and opens the door to searches for particles with abnormal stopping power like monopoles or lightly-ionizing particles (LIPs). Results are presented which evaluate the precision of the reconstruction tools as they currently stand against Monte Carlo generated data. The algorithm is presented in the context of the CUORE experiment, but has applications to other segmented calorimeter detectors.

14 pages, 7 figures

References in corpus (20)

• pymoo: Multi-objective Optimization in Python
• Kinetic Mixing of the Photon with Hidden U(1)s in String Phenomenology
• Improved Limit on Neutrinoless Double-Beta Decay in ${}^{130}$Te with CUORE
• Masses of 130Te, 130Xe and double-beta-decay Q-value of 130Te
• Muon `Depth -- Intensity' Relation Measured by LVD Underground Experiment and Cosmic-Ray Muon Spectrum at Sea Level
• Double-beta decay Q values of 130Te, 128Te, and 120Te
• Analysis Techniques for the Evaluation of the Neutrinoless Double-Beta Decay Lifetime in ${}^{130}$Te with CUORE-0
• The CUORE cryostat: an infrastructure for rare event searches at millikelvin temperatures
• Saturated Overburden Scattering and the Multiscatter Frontier: Discovering Dark Matter at the Planck Mass and Beyond
• The front-end electronics system for the CUORE experiment
• Monte Carlo evaluation of the external gamma, neutron and muon induced background sources in the CUORE experiment
• First Limit on the Direct Detection of Lightly Ionizing Particles for Electric Charge as Low as $e$/1000 with the \textsc{Majorana Demonstrator}
• Cosmogenic Activation of Materials Used in Rare Event Search Experiments
• Measurement of the 2$\nu \beta \beta$ Decay Half-life of ${}^{130}$Te with CUORE
• Direct Detection Limits on Heavy Dark Matter
• A data acquisition and control system for large mass bolometer arrays
• Cosmogenic-neutron activation of TeO2 and implications for neutrinoless double-beta decay experiments
• Composite Millicharged Dark Matter
• Cosmogenic activation in double beta decay experiments
• Constraints on Lightly Ionizing Particles from CDMSlite