Dark Matter Search with the DEAP-3600 Detector using the Profile Likelihood Ratio Method
Abstract
We present here a search for WIMP dark matter using 790.8 live-days of data collected with 3269 kg of liquid argon (1266 kg fiducial) by the DEAP-3600 detector at SNOLAB, using the Profile Likelihood Ratio method. The likelihood model is based on three parameters: estimated energy, pulse-shape discrimination parameter, and reconstructed position within the detector. Using this method, the expected signal sensitivity of DEAP-3600 benefits from an increased fiducial volume and improved event selection acceptance. Alpha-decays from a small number of dust particulates circulating within the liquid argon target are the dominant source of background events and limit the sensitivity of this search. This result provides improved exclusion upper limits on the WIMP-nucleon spin-independent cross section on liquid argon for WIMP masses between 20 GeV/ and 100 GeV/. At 100 GeV/ the observed limit is 3.4 10 cm at 90% confidence level.
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Cite
@article{arxiv.2603.13965,
title = {Dark Matter Search with the DEAP-3600 Detector using the Profile Likelihood Ratio Method},
author = {DEAP Collaboration and P. Adhikari and R. Ajaj and M. Alpízar-Venegas and P. -A. Amaudruz and J. Anstey and D. J. Auty and M. Baldwin and M. Batygov and B. Beltran and A. Bigentini and C. E. Bina and W. Bonivento and M. G. Boulay and J. F. Bueno and P. M. Burghardt and A. Butcher and M. Cadeddu and B. Cai and M. Cárdenas-Montes and S. Cavuoti and Y. Chen and S. Choudhary and B. T. Cleveland and R. Crampton and S. Daugherty and P. DelGobbo and P. Di Stefano and G. Dolganov and L. Doria and F. A. Duncan and M. Dunford and E. Ellingwood and A. Erlandson and S. S. Farahani and N. Fatemighomi and G. Fiorillo and R. J. Ford and D. Gahan and D. Gallacher and A. Garai and P. García Abia and S. Garg and P. Giampa and A. Giménez-Alcázar and D. Goeldi and P. Gorel and K. Graham and A. Grobov and A. L. Hallin and M. Hamstra and S. Haskins and J. Hu and J. Hucker and D. Huff and T. Hugues and A. Ilyasov and B. Jigmeddorj and C. J. Jillings and A. Joy and G. Kaur and A. Kemp and M. Khoshraftar Yazdi and M. Kuźniak and F. La Zia and M. Lai and S. Langrock and B. Lehnert and J. LePage-Bourbonnais and M. Lissia and L. Luzzi and I. Machulin and P. Majewski and A. Maru and J. Mason and A. B. McDonald and T. McElroy and J. B. McLaughlin and C. Mielnichuk and L. Mirasola and A. Moharana and J. Monroe and A. Murray and M. Needs and C. Ng and G. Oliviéro and M. Olszewski and S. Pal and D. Papi and B. Park and M. Perry and V. Pesudo and T. R. Pollmann and F. Rad and C. Rethmeier and F. Retière and I. Rodríguez García and L. Roszkowski and R. Santorelli and F. G. Schuckman and N. Seeburn and S. Seth and V. Shalamova and P. Skensved and T. Smirnova and N. J. T. Smith and K. Sobotkiewich and T. Sonley and J. Sosiak and J. Soukup and R. Stainforth and M. Stringer and J. Tang and P. Taylor and R. Turcotte-Tardif and E. Vázquez-Jáuregui and G. Vera Díaz and S. Viel and B. Vyas and M. Walczak and J. Walding and M. Ward and S. Westerdale and R. Wormington and A. Zuñiga-Reyes},
journal= {arXiv preprint arXiv:2603.13965},
year = {2026}
}
Comments
16 pages, 9 figures