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Search for low-mass weakly interacting massive particles using voltage-assisted calorimetric ionization detection in the SuperCDMS experiment.

  • Author(s): Agnese, R;
  • Anderson, AJ;
  • Asai, M;
  • Balakishiyeva, D;
  • Basu Thakur, R;
  • Bauer, DA;
  • Billard, J;
  • Borgland, A;
  • Bowles, MA;
  • Brandt, D;
  • Brink, PL;
  • Bunker, R;
  • Cabrera, B;
  • Caldwell, DO;
  • Cerdeno, DG;
  • Chagani, H;
  • Cooley, J;
  • Cornell, B;
  • Crewdson, CH;
  • Cushman, P;
  • Daal, M;
  • Di Stefano, PCF;
  • Doughty, T;
  • Esteban, L;
  • Fallows, S;
  • Figueroa-Feliciano, E;
  • Godfrey, GL;
  • Golwala, SR;
  • Hall, J;
  • Harris, HR;
  • Hertel, SA;
  • Hofer, T;
  • Holmgren, D;
  • Hsu, L;
  • Huber, ME;
  • Jastram, A;
  • Kamaev, O;
  • Kara, B;
  • Kelsey, MH;
  • Kennedy, A;
  • Kiveni, M;
  • Koch, K;
  • Loer, B;
  • Lopez Asamar, E;
  • Mahapatra, R;
  • Mandic, V;
  • Martinez, C;
  • McCarthy, KA;
  • Mirabolfathi, N;
  • Moffatt, RA;
  • Moore, DC;
  • Nadeau, P;
  • Nelson, RH;
  • Page, K;
  • Partridge, R;
  • Pepin, M;
  • Phipps, A;
  • Prasad, K;
  • Pyle, M;
  • Qiu, H;
  • Rau, W;
  • Redl, P;
  • Reisetter, A;
  • Ricci, Y;
  • Saab, T;
  • Sadoulet, B;
  • Sander, J;
  • Schneck, K;
  • Schnee, RW;
  • Scorza, S;
  • Serfass, B;
  • Shank, B;
  • Speller, D;
  • Villano, AN;
  • Welliver, B;
  • Wright, DH;
  • Yellin, S;
  • Yen, JJ;
  • Young, BA;
  • Zhang, J;
  • (SuperCDMS collaboration)
  • et al.
Abstract

SuperCDMS is an experiment designed to directly detect weakly interacting massive particles (WIMPs), a favored candidate for dark matter ubiquitous in the Universe. In this Letter, we present WIMP-search results using a calorimetric technique we call CDMSlite, which relies on voltage-assisted Luke-Neganov amplification of the ionization energy deposited by particle interactions. The data were collected with a single 0.6 kg germanium detector running for ten live days at the Soudan Underground Laboratory. A low energy threshold of 170  eVee (electron equivalent) was obtained, which allows us to constrain new WIMP-nucleon spin-independent parameter space for WIMP masses below 6  GeV/c2.

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