The track-length extension fitting algorithm for energy measurement of interacting particles in liquid argon TPCs and its performance with ProtoDUNE-SP data | CU Experts

Abstract; This paper introduces a novel track-length extension fitting; algorithm for measuring the kinetic energies of inelastically; interacting particles in liquid argon time projection chambers; (LArTPCs). The algorithm finds the most probable offset in track; length for a track-like object by comparing the measured ionization; density as a function of position with a theoretical prediction of; the energy loss as a function of the energy, including models of; electron recombination and detector response. The algorithm can be; used to measure the energies of particles that interact before they; stop, such as charged pions that are absorbed by argon nuclei. The; algorithm's energy measurement resolutions and fractional biases are; presented as functions of particle kinetic energy and number of; track hits using samples of stopping secondary charged pions in data; collected by the ProtoDUNE-SP detector, and also in a detailed; simulation. Additional studies describe the impact of the ; dE/dx model on energy measurement performance. The method; described in this paper to characterize the energy measurement; performance can be repeated in any LArTPC experiment using stopping; secondary charged pions.

Abed Abud A; Abi B; Acciarri R; Acero MA; Adames MR; Adamov G; Adamowski M; Adams D; Adinolfi M; Adriano C

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