학술논문
New Results from the Search for Low-Mass Weakly Interacting Massive Particles with the CDMS Low Ionization Threshold Experiment
Document Type
article
Author
Agnese, R; Anderson, AJ; Aramaki, T; Asai, M; Baker, W; Balakishiyeva, D; Barker, D; Thakur, R Basu; Bauer, DA; Billard, J; Borgland, A; Bowles, MA; Brink, PL; Bunker, R; Cabrera, B; Caldwell, DO; Calkins, R; Cerdeno, DG; Chagani, H; Chen, Y; Cooley, J; Cornell, B; Cushman, P; Daal, M; Di Stefano, PCF; Doughty, T; Esteban, L; Fallows, S; Figueroa-Feliciano, E; Ghaith, M; Godfrey, GL; Golwala, SR; Hall, J; Harris, HR; Hofer, T; Holmgren, D; Hsu, L; Huber, ME; Jardin, D; Jastram, A; Kamaev, O; Kara, B; Kelsey, MH; Kennedy, A; Leder, A; Loer, B; Asamar, E Lopez; Lukens, P; Mahapatra, R; Mandic, V; Mast, N; Mirabolfathi, N; Moffatt, RA; Mendoza, JD Morales; Oser, SM; Page, K; Page, WA; Partridge, R; Pepin, M; Phipps, A; Prasad, K; Pyle, M; Qiu, H; Rau, W; Redl, P; Reisetter, A; Ricci, Y; Roberts, A; Rogers, HE; Saab, T; Sadoulet, B; Sander, J; Schneck, K; Schnee, RW; Scorza, S; Serfass, B; Shank, B; Speller, D; Toback, D; Underwood, R; Upadhyayula, S; Villano, AN; Welliver, B; Wilson, JS; Wright, DH; Yellin, S; Yen, JJ; Young, BA; Zhang, J
Source
Physical Review Letters. 116(7)
Subject
Language
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/c^{2}.