Improved WIMP-search reach of the CDMS II germanium data
- Agnese, R;
- Anderson, AJ;
- Asai, M;
- Balakishiyeva, D;
- Barker, D;
- Thakur, R Basu;
- Bauer, DA;
- Billard, J;
- Borgland, A;
- Bowles, MA;
- Brandt, D;
- Brink, PL;
- Bunker, R;
- Cabrera, B;
- Caldwell, DO;
- Calkins, R;
- Cerdeño, DG;
- Chagani, H;
- Chen, Y;
- 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;
- Jardin, D;
- Jastram, A;
- Kamaev, O;
- Kara, B;
- Kelsey, MH;
- Kennedy, A;
- Kiveni, M;
- Koch, K;
- Leder, A;
- Loer, B;
- Asamar, E Lopez;
- Lukens, P;
- Mahapatra, R;
- Mandic, V;
- McCarthy, KA;
- Mirabolfathi, N;
- Moffatt, RA;
- 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;
- Rogers, HE;
- Saab, T;
- Sadoulet, B;
- Sander, J;
- Schneck, K;
- Schnee, RW;
- Scorza, S;
- Serfass, B;
- Shank, B;
- Speller, D;
- Toback, D;
- Upadhyayula, S;
- Villano, AN;
- Welliver, B;
- Wilson, JS;
- Wright, DH;
- Yang, X;
- Yellin, S;
- Yen, JJ;
- Young, BA;
- Zhang, J
- et al.
Published Web Location
http://journals.aps.org/prd/abstract/10.1103/PhysRevD.92.072003Abstract
CDMS II data from the five-tower runs at the Soudan Underground Laboratory were reprocessed with an improved charge-pulse fitting algorithm. Two new analysis techniques to reject surface-event backgrounds were applied to the 612 kg days germanium-detector weakly interacting massive particle (WIMP)-search exposure. An extended analysis was also completed by decreasing the 10 keV analysis threshold to ∼5keV, to increase sensitivity near a WIMP mass of 8GeV/c2. After unblinding, there were zero candidate events above a deposited energy of 10 keV and six events in the lower-threshold analysis. This yielded minimum WIMP-nucleon spin-independent scattering cross-section limits of 1.8×10-44 and 1.18×10-41 at 90% confidence for 60 and 8.6GeV/c2 WIMPs, respectively. This improves the previous CDMS II result by a factor of 2.4 (2.7) for 60 (8.6)GeV/c2 WIMPs.
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