Dr Ashlea Kemp: Publications

Pulse-shape discrimination against low-energy Ar-39 beta decays in liquid argon with 4.5 tonne-years of DEAP-3600 data.

The European physical journal. C, Particles and fields 81:9 (2021) 823

Authors:

P Adhikari, R Ajaj, M Alpízar-Venegas, P-A Amaudruz, DJ Auty, M Batygov, B Beltran, H Benmansour, CE Bina, J Bonatt, W Bonivento, MG Boulay, B Broerman, JF Bueno, PM Burghardt, A Butcher, M Cadeddu, B Cai, M Cárdenas-Montes, S Cavuoti, M Chen, Y Chen, BT Cleveland, JM Corning, D Cranshaw, S Daugherty, P DelGobbo, K Dering, J DiGioseffo, P Di Stefano, L Doria, FA Duncan, M Dunford, E Ellingwood, A Erlandson, SS Farahani, N Fatemighomi, G Fiorillo, S Florian, T Flower, RJ Ford, R Gagnon, D Gallacher, P García Abia, S Garg, P Giampa, D Goeldi, V Golovko, P Gorel, K Graham, DR Grant, A Grobov, AL Hallin, M Hamstra, PJ Harvey, C Hearns, T Hugues, A Ilyasov, A Joy, B Jigmeddorj, CJ Jillings, O Kamaev, G Kaur, A Kemp, I Kochanek, M Kuźniak, M Lai, S Langrock, B Lehnert, A Leonhardt, N Levashko, X Li, J Lidgard, T Lindner, M Lissia, J Lock, G Longo, I Machulin, AB McDonald, T McElroy, T McGinn, JB McLaughlin, R Mehdiyev, C Mielnichuk, J Monroe, P Nadeau, C Nantais, C Ng, AJ Noble, E O'Dwyer, G Oliviéro, C Ouellet, S Pal, P Pasuthip, SJM Peeters, M Perry, V Pesudo, E Picciau, M-C Piro, TR Pollmann, ET Rand, C Rethmeier, F Retière, I Rodríguez-García, L Roszkowski, JB Ruhland, E Sánchez-García, R Santorelli, D Sinclair, P Skensved, B Smith, NJT Smith, T Sonley, J Soukup, R Stainforth, C Stone, V Strickland, M Stringer, B Sur, J Tang, E Vázquez-Jáuregui, S Viel, J Walding, M Waqar, M Ward, S Westerdale, J Willis, A Zuñiga-Reyes, DEAP Collaboration

Abstract:

The DEAP-3600 detector searches for the scintillation signal from dark matter particles scattering on a 3.3 tonne liquid argon target. The largest background comes from 39 Ar beta decays and is suppressed using pulse-shape discrimination (PSD). We use two types of PSD estimator: the prompt-fraction, which considers the fraction of the scintillation signal in a narrow and a wide time window around the event peak, and the log-likelihood-ratio, which compares the observed photon arrival times to a signal and a background model. We furthermore use two algorithms to determine the number of photons detected at a given time: (1) simply dividing the charge of each PMT pulse by the mean single-photoelectron charge, and (2) a likelihood analysis that considers the probability to detect a certain number of photons at a given time, based on a model for the scintillation pulse shape and for afterpulsing in the light detectors. The prompt-fraction performs approximately as well as the log-likelihood-ratio PSD algorithm if the photon detection times are not biased by detector effects. We explain this result using a model for the information carried by scintillation photons as a function of the time when they are detected.

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Constraints on dark matter-nucleon effective couplings in the presence of kinematically distinct halo substructures using the DEAP-3600 detector

Physical Review D American Physical Society (APS) 102:8 (2020) 082001

Authors:

P Adhikari, R Ajaj, DJ Auty, CE Bina, W Bonivento, MG Boulay, M Cadeddu, B Cai, M Cárdenas-Montes, S Cavuoti, Y Chen, BT Cleveland, JM Corning, S Daugherty, P DelGobbo, P Di Stefano, L Doria, M Dunford, A Erlandson, SS Farahani, N Fatemighomi, G Fiorillo, D Gallacher, EA Garcés, P García Abia, S Garg, P Giampa, D Goeldi, P Gorel, K Graham, A Grobov, AL Hallin, M Hamstra, T Hugues, A Ilyasov, A Joy, B Jigmeddorj, CJ Jillings, O Kamaev, G Kaur, A Kemp, I Kochanek, M Kuźniak, M Lai, S Langrock, B Lehnert, N Levashko, X Li, O Litvinov, J Lock, G Longo, I Machulin, AB McDonald, T McElroy, JB McLaughlin, C Mielnichuk, J Monroe, G Oliviéro, S Pal, SJM Peeters, V Pesudo, M-C Piro, TR Pollmann, ET Rand, C Rethmeier, F Retière, I Rodríguez-García, L Roszkowski, E Sanchez García, T Sánchez-Pastor, R Santorelli, D Sinclair, P Skensved, B Smith, NJT Smith, T Sonley, R Stainforth, M Stringer, B Sur, E Vázquez-Jáuregui, S Viel, AC Vincent, J Walding, M Waqar, M Ward, S Westerdale, J Willis, A Zuñiga-Reyes

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The liquid-argon scintillation pulseshape in DEAP-3600

European Physical Journal C Springer Nature 80:4 (2020) 303

Authors:

P Adhikari, R Ajaj, GR Araujo, M Batygov, B Beltran, CE Bina, MG Boulay, B Broerman, JF Bueno, A Butcher, B Cai, M Cárdenas-Montes, S Cavuoti, Y Chen, BT Cleveland, JM Corning, SJ Daugherty, P Di Stefano, K Dering, L Doria, FA Duncan, M Dunford, A Erlandson, N Fatemighomi, G Fiorillo, A Flower, RJ Ford, R Gagnon, D Gallacher, EA Garcés, P García Abia, S Garg, P Giampa, D Goeldi, VV Golovko, P Gorel, K Graham, DR Grant, A Grobov, AL Hallin, M Hamstra, PJ Harvey, C Hearns, A Ilyasov, A Joy, CJ Jillings, O Kamaev, G Kaur, A Kemp, I Kochanek, M Kuźniak, S Langrock, F La Zia, B Lehnert, N Levashko, X Li, O Litvinov, J Lock, G Longo, I Machulin, P Majewski, AB McDonald, T McElroy, T McGinn, JB McLaughlin, R Mehdiyev, C Mielnichuk, J Monroe, P Nadeau, C Nantais, C Ng, AJ Noble, G Oliviéro, C Ouellet, S Pal, P Pasuthip, SJM Peeters, V Pesudo, M-C Piro, TR Pollmann, ET Rand, C Rethmeier, F Retière, E Sanchez García, T Sánchez-Pastor, R Santorelli, N Seeburn, P Skensved, B Smith, NJT Smith, T Sonley, R Stainforth, C Stone, V Strickland, M Stringer, B Sur, E Vázquez-Jáuregui, L Veloce, S Viel, J Walding, M Waqar, M Ward, S Westerdale, J Willis, A Zuñiga-Reyes

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Electromagnetic backgrounds and potassium-42 activity in the DEAP-3600 dark matter detector

Physical Review D American Physical Society (APS) 100:7 (2019) 072009

Authors:

R Ajaj, GR Araujo, M Batygov, B Beltran, CE Bina, MG Boulay, B Broerman, JF Bueno, PM Burghardt, A Butcher, B Cai, M Cárdenas-Montes, S Cavuoti, M Chen, Y Chen, BT Cleveland, K Dering, FA Duncan, M Dunford, A Erlandson, N Fatemighomi, G Fiorillo, A Flower, RJ Ford, R Gagnon, D Gallacher, P García Abia, S Garg, P Giampa, D Goeldi, VV Golovko, P Gorel, K Graham, DR Grant, AL Hallin, M Hamstra, PJ Harvey, C Hearns, A Joy, CJ Jillings, O Kamaev, G Kaur, A Kemp, I Kochanek, M Kuźniak, S Langrock, F La Zia, B Lehnert, X Li, O Litvinov, J Lock, G Longo, P Majewski, AB McDonald, T McElroy, T McGinn, JB McLaughlin, R Mehdiyev, C Mielnichuk, J Monroe, P Nadeau, C Nantais, C Ng, AJ Noble, C Ouellet, P Pasuthip, SJM Peeters, V Pesudo, M-C Piro, TR Pollmann, ET Rand, C Rethmeier, F Retière, E Sanchez García, R Santorelli, N Seeburn, P Skensved, B Smith, NJT Smith, T Sonley, R Stainforth, C Stone, V Strickland, B Sur, E Vázquez-Jáuregui, L Veloce, S Viel, J Walding, M Waqar, M Ward, S Westerdale, J Willis, A Zuñiga-Reyes

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Search for dark matter with a 231-day exposure of liquid argon using DEAP-3600 at SNOLAB

Physical Review D American Physical Society (APS) 100:2 (2019) 022004

Authors:

R Ajaj, P-A Amaudruz, GR Araujo, M Baldwin, M Batygov, B Beltran, CE Bina, J Bonatt, MG Boulay, B Broerman, JF Bueno, PM Burghardt, A Butcher, B Cai, S Cavuoti, M Chen, Y Chen, BT Cleveland, D Cranshaw, K Dering, J DiGioseffo, L Doria, FA Duncan, M Dunford, A Erlandson, N Fatemighomi, G Fiorillo, S Florian, A Flower, RJ Ford, R Gagnon, D Gallacher, EA Garcés, S Garg, P Giampa, D Goeldi, VV Golovko, P Gorel, K Graham, DR Grant, AL Hallin, M Hamstra, PJ Harvey, C Hearns, A Joy, CJ Jillings, O Kamaev, G Kaur, A Kemp, I Kochanek, M Kuźniak, S Langrock, F La Zia, B Lehnert, X Li, J Lidgard, T Lindner, O Litvinov, J Lock, G Longo, P Majewski, AB McDonald, T McElroy, T McGinn, JB McLaughlin, R Mehdiyev, C Mielnichuk, J Monroe, P Nadeau, C Nantais, C Ng, AJ Noble, E O’Dwyer, C Ouellet, P Pasuthip, SJM Peeters, M-C Piro, TR Pollmann, ET Rand, C Rethmeier, F Retière, N Seeburn, K Singhrao, P Skensved, B Smith, NJT Smith, T Sonley, J Soukup, R Stainforth, C Stone, V Strickland, B Sur, J Tang, E Vázquez-Jáuregui, L Veloce, S Viel, J Walding, M Waqar, M Ward, S Westerdale, J Willis, A Zuñiga-Reyes

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Dr Ashlea Kemp

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Pulse-shape discrimination against low-energy Ar-39 beta decays in liquid argon with 4.5 tonne-years of DEAP-3600 data.

Authors:

Abstract:

Constraints on dark matter-nucleon effective couplings in the presence of kinematically distinct halo substructures using the DEAP-3600 detector

Authors:

The liquid-argon scintillation pulseshape in DEAP-3600

Authors:

Electromagnetic backgrounds and potassium-42 activity in the DEAP-3600 dark matter detector

Authors:

Search for dark matter with a 231-day exposure of liquid argon using DEAP-3600 at SNOLAB

Authors:

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