New Results from the Search for Low-Mass Weakly Interacting Massive Particles with the CDMS Low Ionization Threshold Experiment

Agnese, R.; Anderson, A.J.; Aramaki, T.; Asai, M.; Baker, W.; Balakishiyeva, D.; Barker, D.; Basu Thakur, R.; Bauer, D.A.; Billard, J.; Borgland, A.; Bowles, M.A.; Brink, P.L.; Bunker, R.; Cabrera, B.; Caldwell, D.O.; Calkins, R.; Cerdeno, D.G.; Chagani, H.; Chen, Y.; Cooley, J.; Cornell, B.; Cushman, P.; Daal, M.; Di Stefano, P.C.F.; Doughty, T.; Esteban, L.; Fallows, S.; Figueroa-Feliciano, E.; Ghaith, M.; Godfrey, G.L.; Golwala, S.R.; Hall, J.; Harris, H.R.; Hofer, T.; Holmgren, D.; Hsu, L.; Huber, M.E.; Jardin, D.; Jastram, A.; Kamaev, O.; Kara, B.; Kelsey, M.H.; Kennedy, A.; Leder, A.; Loer, B.; Lopez Asamar, E.; Lukens, P.; Mahapatra, R.; Mandic, V.; Mast, N.; Mirabolfathi, N.; Moffatt, R.A.; Morales Mendoza, J.D.; Oser, S.M.; Page, K.; Page, W.A.; Partridge, R.; Pepin, M.; Phipps, A.; Prasad, K.; Pyle, M.; Qiu, H.; Rau, W.; Redl, P.; Reisetter, A.; Ricci, Y.; Roberts, A.; Rogers, H.E.; Saab, T.; Sadoulet, B.; Sander, J.; Schneck, K.; Schnee, R.W.; Scorza, S.; Serfass, B.; Shank,...

Abstract

The CDMS low ionization threshold experiment (CDMSlite) uses cryogenic germanium detectors operated at a relatively high bias voltage to amplify the phonon signal in the search for weakly interacting massive particles (WIMPs). Results are presented from the second CDMSlite run with an exposure of 70 kg day, which reached an energy threshold for electron recoils as low as 56 eV. A fiducialization cut reduces backgrounds below those previously reported by CDMSlite. New parameter space for the WIMP-nucleon spin-independent cross section is excluded for WIMP masses between 1.6 and 5.5  GeV/c2.

Citation

Agnese, R., Anderson, A., Aramaki, T., Asai, M., Baker, W., Balakishiyeva, D., …Zhang, J. (2016). New Results from the Search for Low-Mass Weakly Interacting Massive Particles with the CDMS Low Ionization Threshold Experiment. Physical Review Letters, 116(7), Article 071301. https://doi.org/10.1103/physrevlett.116.071301

• Journal Article Type: Article
• Acceptance Date: Jan 9, 2016
• Online Publication Date: Feb 17, 2016
• Publication Date: Feb 17, 2016
• Deposit Date: May 18, 2016
• Publicly Available Date: May 19, 2016
• Journal: Physical Review Letters
• Print ISSN: 0031-9007
• Electronic ISSN: 1079-7114
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 116
• Issue: 7
• Article Number: 071301
• DOI: https://doi.org/10.1103/physrevlett.116.071301
• Public URL: https://durham-repository.worktribe.com/output/1381436