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First Event-by-Event Identification of Cherenkov Radiation from Sub-MeV Particles in Liquid Argon

Fuente: arXiv

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Bibliographic Details
Main Authors:	Aguilar-Arevalo, A. A., Biedron, S., Boissevain, J., Borrego, M., Bugel, L., Chavez-Estrada, M., Conrad, J. M., Cooper, R. L., Distel, J. R., D'Olivo, J. C., Dunton, E., Dutta, B., Fields, D. E., Gold, M., Guardincerri, E., Huang, E. C., Kamp, N., Kim, D., Knickerbocker, K., Louis, W. C., Macias-Acevedo, C. F., Mahapatra, R., Mezzetti, J., Mirabal, J., Mocko, M. J., Newmark, D. A., deNiverville, P., O'Connor, C., Pandey, V., Poulson, D., Ray, H., Renner, E., Schaub, T. J., Schneider, A., Shaevitz, M. H., Smith, D., Sondheim, W., Szelc, A. M., Taylor, C., Thompson, A., Thompson, W. H., Tripathi, M., Thornton, R. T., Van Berg, R., Van de Water, R. G.
Format:	Preprint
Published:	2025
Subjects:	Instrumentation and Detectors High Energy Physics - Experiment
Online Access:	Acceder al recurso
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_version_	1866918150286606336
author	Aguilar-Arevalo, A. A. Biedron, S. Boissevain, J. Borrego, M. Bugel, L. Chavez-Estrada, M. Conrad, J. M. Cooper, R. L. Distel, J. R. D'Olivo, J. C. Dunton, E. Dutta, B. Fields, D. E. Gold, M. Guardincerri, E. Huang, E. C. Kamp, N. Kim, D. Knickerbocker, K. Louis, W. C. Macias-Acevedo, C. F. Mahapatra, R. Mezzetti, J. Mirabal, J. Mocko, M. J. Newmark, D. A. deNiverville, P. O'Connor, C. Pandey, V. Poulson, D. Ray, H. Renner, E. Schaub, T. J. Schneider, A. Shaevitz, M. H. Smith, D. Sondheim, W. Szelc, A. M. Taylor, C. Thompson, A. Thompson, W. H. Tripathi, M. Thornton, R. T. Van Berg, R. Van de Water, R. G.
author_facet	Aguilar-Arevalo, A. A. Biedron, S. Boissevain, J. Borrego, M. Bugel, L. Chavez-Estrada, M. Conrad, J. M. Cooper, R. L. Distel, J. R. D'Olivo, J. C. Dunton, E. Dutta, B. Fields, D. E. Gold, M. Guardincerri, E. Huang, E. C. Kamp, N. Kim, D. Knickerbocker, K. Louis, W. C. Macias-Acevedo, C. F. Mahapatra, R. Mezzetti, J. Mirabal, J. Mocko, M. J. Newmark, D. A. deNiverville, P. O'Connor, C. Pandey, V. Poulson, D. Ray, H. Renner, E. Schaub, T. J. Schneider, A. Shaevitz, M. H. Smith, D. Sondheim, W. Szelc, A. M. Taylor, C. Thompson, A. Thompson, W. H. Tripathi, M. Thornton, R. T. Van Berg, R. Van de Water, R. G.
contents	This Letter reports the event-by-event observation of Cherenkov light from sub-MeV electrons in a high scintillation light-yield liquid argon (LAr) detector by the Coherent CAPTAIN-Mills (CCM) experiment. The CCM200 detector, located at Los Alamos National Laboratory, instruments 7 tons (fiducial volume) of LAr with 200 8-inch photomultiplier tubes (PMTs), 80% of which are coated in a wavelength shifting material and the remaining 20% are uncoated. In the prompt time region of an event, defined as $-6 \leq t < 0$ ns relative to the event start time $t=0$, the uncoated PMTs are primarily sensitive to visible Cherenkov photons. Using gamma-rays from a $^{22}$Na source for production of sub-MeV electrons, we isolated prompt Cherenkov light with $>5σ$ confidence and developed a selection to obtain a low-background electromagnetic sample. This is the first event-by-event observation of Cherenkov photons from sub-MeV electrons in a high-yield scintillator detector, and represents a milestone in low-energy particle detector development.
format	Preprint
id	arxiv_https___arxiv_org_abs_2507_08886
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	First Event-by-Event Identification of Cherenkov Radiation from Sub-MeV Particles in Liquid Argon Aguilar-Arevalo, A. A. Biedron, S. Boissevain, J. Borrego, M. Bugel, L. Chavez-Estrada, M. Conrad, J. M. Cooper, R. L. Distel, J. R. D'Olivo, J. C. Dunton, E. Dutta, B. Fields, D. E. Gold, M. Guardincerri, E. Huang, E. C. Kamp, N. Kim, D. Knickerbocker, K. Louis, W. C. Macias-Acevedo, C. F. Mahapatra, R. Mezzetti, J. Mirabal, J. Mocko, M. J. Newmark, D. A. deNiverville, P. O'Connor, C. Pandey, V. Poulson, D. Ray, H. Renner, E. Schaub, T. J. Schneider, A. Shaevitz, M. H. Smith, D. Sondheim, W. Szelc, A. M. Taylor, C. Thompson, A. Thompson, W. H. Tripathi, M. Thornton, R. T. Van Berg, R. Van de Water, R. G. Instrumentation and Detectors High Energy Physics - Experiment This Letter reports the event-by-event observation of Cherenkov light from sub-MeV electrons in a high scintillation light-yield liquid argon (LAr) detector by the Coherent CAPTAIN-Mills (CCM) experiment. The CCM200 detector, located at Los Alamos National Laboratory, instruments 7 tons (fiducial volume) of LAr with 200 8-inch photomultiplier tubes (PMTs), 80% of which are coated in a wavelength shifting material and the remaining 20% are uncoated. In the prompt time region of an event, defined as $-6 \leq t < 0$ ns relative to the event start time $t=0$, the uncoated PMTs are primarily sensitive to visible Cherenkov photons. Using gamma-rays from a $^{22}$Na source for production of sub-MeV electrons, we isolated prompt Cherenkov light with $>5σ$ confidence and developed a selection to obtain a low-background electromagnetic sample. This is the first event-by-event observation of Cherenkov photons from sub-MeV electrons in a high-yield scintillator detector, and represents a milestone in low-energy particle detector development.
title	First Event-by-Event Identification of Cherenkov Radiation from Sub-MeV Particles in Liquid Argon
topic	Instrumentation and Detectors High Energy Physics - Experiment
url	https://arxiv.org/abs/2507.08886