A study of electron recombination using highly ionizing particles in the ArgoNeuT Liquid Argon TPC
R. Acciarri, C. Adams, J. Asaadi, B. Baller, T. Bolton, C. Bromberg,, F. Cavanna, E. Church, D. Edmunds, A. Ereditato, S. Farooq, B. Fleming, H., Greenlee, G. Horton-Smith, C. James, E. Klein, K. Lang, P. Laurens, D. McKee,, R. Mehdiyev, B. Page, O. Palamara, K. Partyka
TL;DR
This paper investigates electron recombination in a liquid argon TPC using highly ionizing particles, revealing that existing models like Birks and Box fit the data, but the angular dependence differs from theoretical predictions.
Contribution
It provides experimental measurements of electron recombination with highly ionizing particles and compares them to existing models and theories, highlighting discrepancies in angular dependence.
Findings
Recombination data are well modeled by Birks and modified Box models.
Recombination dependence on track angle is weaker than predicted by Jaffe theory.
Experimental results challenge existing theoretical models of electron recombination.
Abstract
Electron recombination in highly ionizing stopping protons and deuterons is studied in the ArgoNeuT detector. The data are well modeled by either a Birks model or a modified form of the Box model. The dependence of recombination on the track angle with respect to the electric field direction is much weaker than the predictions of the Jaffe columnar theory and by theoretical-computational simulations.
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