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1. Search for Low-Mass Weakly Interacting Massive Particles with SuperCDMS

Author

Agnese, R, Anderson, AJ, Asai, M, Balakishiyeva, D, Thakur, R Basu, Bauer, DA, Beaty, J, Billard, J, Borgland, A, Bowles, MA, Brandt, D, Brink, PL, Bunker, R, Cabrera, B, Caldwell, DO, Cerdeno, DG, Chagani, H, Chen, Y, Cherry, M, Cooley, J, Cornell, B, Crewdson, CH, Cushman, P, Daal, M, DeVaney, D, Di Stefano, PCF, Do Couto E Silva, E, Doughty, T, Esteban, L, Fallows, S, Figueroa-Feliciano, E, Godfrey, GL, Golwala, SR, Hall, J, Hansen, S, Harris, HR, Hertel, SA, Hines, BA, Hofer, T, Holmgren, D, Hsu, L, Huber, ME, Jastram, A, Kamaev, O, Kara, B, Kelsey, MH, Kenany, S, Kennedy, A, Kiveni, M, Koch, K, Leder, A, Loer, B, Asamar, E Lopez, Mahapatra, R, Mandic, V, Martinez, C, McCarthy, KA, Mirabolfathi, N, Moffatt, RA, Nelson, RH, Novak, L, Page, K, Partridge, R, Pepin, M, Phipps, A, Platt, M, Prasad, K, Pyle, M, Qiu, H, Rau, W, Redl, P, Reisetter, A, Resch, RW, Ricci, Y, Ruschman, M, Saab, T, Sadoulet, B, Sander, J, Schmitt, RL, Schneck, K, Schnee, RW, Scorza, S, Seitz, DN, Serfass, B, Shank, B, Speller, D, Tomada, A, Upadhyayula, S, Villano, AN, Welliver, B, Wright, DH, Yellin, S, Yen, JJ, Young, BA, and Zhang, J

Subjects
(SuperCDMS Collaboration), hep-ex, astro-ph.CO, physics.ins-det, Mathematical Sciences, Physical Sciences, Engineering, General Physics
Abstract

We report a first search for weakly interacting massive particles (WIMPs) using the background rejection capabilities of SuperCDMS. An exposure of 577 kg days was analyzed for WIMPs with mass

Published
2014

2. Combined limits on WIMPs from the CDMS and EDELWEISS experiments

Author

Ahmed, Z, Akerib, DS, Armengaud, E, Arrenberg, S, Augier, C, Bailey, CN, Balakishiyeva, D, Baudis, L, Bauer, DA, Benoît, A, Bergé, L, Blümer, J, Brink, PL, Broniatowski, A, Bruch, T, Brudanin, V, Bunker, R, Cabrera, B, Caldwell, DO, Censier, B, Chapellier, M, Chardin, G, Charlieux, F, Cooley, J, Coulter, P, Cox, GA, Cushman, P, Daal, M, Defay, X, De Jesus, M, DeJongh, F, Di Stefano, PCF, Dolgorouki, Y, Domange, J, Dumoulin, L, Dragowsky, MR, Eitel, K, Fallows, S, Figueroa-Feliciano, E, Filippini, J, Filosofov, D, Fourches, N, Fox, J, Fritts, M, Gascon, J, Gerbier, G, Gironnet, J, Golwala, SR, Gros, M, Hall, J, Hennings-Yeomans, R, Henry, S, Hertel, SA, Hervé, S, Holmgren, D, Hsu, L, Huber, ME, Juillard, A, Kamaev, O, Kiveni, M, Kluck, H, Kos, M, Kozlov, V, Kraus, H, Kudryavtsev, VA, Leman, SW, Liu, S, Loaiza, P, Mahapatra, R, Mandic, V, Marnieros, S, Martinez, C, McCarthy, KA, Mirabolfathi, N, Moore, D, Nadeau, P, Navick, X-F, Nelson, H, Nones, C, Ogburn, RW, Olivieri, E, Pari, P, Pattavina, L, Paul, B, Phipps, A, Pyle, M, Qiu, X, Rau, W, Reisetter, A, Ricci, Y, Robinson, M, Rozov, S, Saab, T, Sadoulet, B, Sander, J, Sanglard, V, Schmidt, B, Schnee, RW, Scorza, S, and Seitz, DN

Subjects
astro-ph.CO, hep-ex, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract

The CDMS and EDELWEISS collaborations have combined the results of their direct searches for dark matter using cryogenic germanium detectors. The total data set represents 614kg•days equivalent exposure. A straightforward method of combination was chosen for its simplicity before data were exchanged between experiments. The results are interpreted in terms of limits on spin-independent weakly interacting, massive particle (WIMP)-nucleon cross section. For a WIMP mass of 90GeV/c2, where this analysis is most sensitive, a cross section of 3.3×10-44cm2 is excluded at 90% C.L. At higher WIMP masses, the combination improves the individual limits, by a factor 1.6 above 700GeV/c2. Alternative methods of combining the data provide stronger constraints for some ranges of WIMP masses and weaker constraints for others. © 2011 American Physical Society.

Published
2011

3. Search for inelastic dark matter with the CDMS II experiment

Author

Ahmed, Z, Akerib, DS, Arrenberg, S, Bailey, CN, Balakishiyeva, D, Baudis, L, Bauer, DA, Brink, PL, Bruch, T, Bunker, R, Cabrera, B, Caldwell, DO, Cooley, J, do Couto e Silva, E, Cushman, P, Daal, M, DeJongh, F, Di Stefano, P, Dragowsky, MR, Duong, L, Fallows, S, Figueroa-Feliciano, E, Filippini, J, Fox, J, Fritts, M, Golwala, SR, Hall, J, Hennings-Yeomans, R, Hertel, SA, Holmgren, D, Hsu, L, Huber, ME, Kamaev, O, Kiveni, M, Kos, M, Leman, SW, Liu, S, Mahapatra, R, Mandic, V, McCarthy, KA, Mirabolfathi, N, Moore, D, Nelson, H, Ogburn, RW, Phipps, A, Pyle, M, Qiu, X, Ramberg, E, Rau, W, Razeti, M, Reisetter, A, Resch, R, Saab, T, Sadoulet, B, Sander, J, Schnee, RW, Seitz, DN, Serfass, B, Sundqvist, KM, Tarka, M, Wikus, P, Yellin, S, Yoo, J, Young, BA, and Zhang, J

Subjects
astro-ph.CO, hep-ex, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract

Results are presented from a reanalysis of the entire five-tower data set acquired with the Cryogenic Dark Matter Search (CDMS II) experiment at the Soudan Underground Laboratory, with an exposure of 969 kg-days. The analysis window was extended to a recoil energy of 150 keV, and an improved surface-event background-rejection cut was defined to increase the sensitivity of the experiment to the inelastic dark matter (iDM) model. Three dark matter candidates were found between 25 keV and 150 keV. The probability to observe three or more background events in this energy range is 11%. Because of the occurrence of these events, the constraints on the iDM parameter space are slightly less stringent than those from our previous analysis, which used an energy window of 10-100 keV. © 2011 American Physical Society.

Published
2011

4. Results from a Low-Energy Analysis of the CDMS II Germanium Data

Author

Ahmed, Z, Akerib, DS, Arrenberg, S, Bailey, CN, Balakishiyeva, D, Baudis, L, Bauer, DA, Brink, PL, Bruch, T, Bunker, R, Cabrera, B, Caldwell, DO, Cooley, J, do Couto e Silva, E, Cushman, P, Daal, M, DeJongh, F, Di Stefano, P, Dragowsky, MR, Duong, L, Fallows, S, Figueroa-Feliciano, E, Filippini, J, Fox, J, Fritts, M, Golwala, SR, Hall, J, Hennings-Yeomans, R, Hertel, SA, Holmgren, D, Hsu, L, Huber, ME, Kamaev, O, Kiveni, M, Kos, M, Leman, SW, Liu, S, Mahapatra, R, Mandic, V, McCarthy, KA, Mirabolfathi, N, Moore, D, Nelson, H, Ogburn, RW, Phipps, A, Pyle, M, Qiu, X, Ramberg, E, Rau, W, Reisetter, A, Resch, R, Saab, T, Sadoulet, B, Sander, J, Schnee, RW, Seitz, DN, Serfass, B, Sundqvist, KM, Tarka, M, Wikus, P, Yellin, S, Yoo, J, Young, BA, and Zhang, J

Subjects
CDMS Collaboration, astro-ph.CO, hep-ex, Mathematical Sciences, Physical Sciences, Engineering, General Physics
Abstract

We report results from a reanalysis of data from the Cryogenic Dark Matter Search (CDMS II) experiment at the Soudan Underground Laboratory. Data taken between October 2006 and September 2008 using eight germanium detectors are reanalyzed with a lowered, 2 keV recoil-energy threshold, to give increased sensitivity to interactions from weakly interacting massive particles (WIMPs) with masses below ∼10  GeV/c(2). This analysis provides stronger constraints than previous CDMS II results for WIMP masses below 9  GeV/c(2) and excludes parameter space associated with possible low-mass WIMP signals from the DAMA/LIBRA and CoGeNT experiments.

Published
2011

5. Low-threshold analysis of CDMS shallow-site data

Author

Akerib, DS, Attisha, MJ, Baudis, L, Bauer, DA, Bolozdynya, AI, Brink, PL, Bunker, R, Cabrera, B, Caldwell, DO, Chang, CL, Clarke, RM, Cooley, J, Crisler, MB, Cushman, P, Dejongh, F, Dixon, R, Driscoll, DD, Filippini, J, Funkhouser, S, Gaitskell, RJ, Golwala, SR, Holmgren, D, Hsu, L, Huber, ME, Kamat, S, Mahapatra, R, Mandic, V, Meunier, P, Mirabolfathi, N, Moore, D, Nam, SW, Nelson, H, Ogburn, RW, Qiu, X, Rau, W, Reisetter, A, Saab, T, Sadoulet, B, Sander, J, Savage, C, Schnee, RW, Seitz, DN, Shutt, TA, Wang, G, Yellin, S, Yoo, J, and Young, BA

Subjects
astro-ph.CO, hep-ex, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract

Data taken during the final shallow-site run of the first tower of the Cryogenic Dark Matter Search (CDMS II) detectors have been reanalyzed with improved sensitivity to small energy depositions. Four ∼224g germanium and two ∼105g silicon detectors were operated at the Stanford Underground Facility (SUF) between December 2001 and June 2002, yielding 118 live days of raw exposure. Three of the germanium and both silicon detectors were analyzed with a new low-threshold technique, making it possible to lower the germanium and silicon analysis thresholds down to the actual trigger thresholds of ∼1 and ∼2keV, respectively. Limits on the spin-independent cross section for weakly interacting massive particles (WIMPs) to elastically scatter from nuclei based on these data exclude interesting parameter space for WIMPs with masses below 9GeV/c2. Under standard halo assumptions, these data partially exclude parameter space favored by interpretations of the DAMA/LIBRA and CoGeNT experiments' data as WIMP signals, and exclude new parameter space for WIMP masses between 3 and 4GeV/c2. © 2010 The American Physical Society.

Published
2010

6. Analysis of the low-energy electron-recoil spectrum of the CDMS experiment

Author

Ahmed, Z, Akerib, DS, Arrenberg, S, Bailey, CN, Balakishiyeva, D, Baudis, L, Bauer, DA, Beaty, J, Brink, PL, Bruch, T, Bunker, R, Cabrera, B, Caldwell, DO, Cooley, J, Cushman, P, Dejongh, F, Dragowsky, MR, Duong, L, Figueroa-Feliciano, E, Filippini, J, Fritts, M, Golwala, SR, Grant, DR, Hall, J, Hennings-Yeomans, R, Hertel, S, Holmgren, D, Hsu, L, Huber, ME, Kamaev, O, Kiveni, M, Kos, M, Leman, SW, Mahapatra, R, Mandic, V, Moore, D, McCarthy, KA, Mirabolfathi, N, Nelson, H, Ogburn, RW, Pyle, M, Qiu, X, Ramberg, E, Rau, W, Reisetter, A, Saab, T, Sadoulet, B, Sander, J, Schnee, RW, Seitz, DN, Serfass, B, Sundqvist, KM, Wang, G, Wikus, P, Yellin, S, Yoo, J, and Young, BA

Subjects
astro-ph.GA, astro-ph.CO, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract

We report on the analysis of the low-energy electron-recoil spectrum from the CDMS II experiment using data with an exposure of 443.2 kg-days. The analysis provides details on the observed counting rate and possible background sources in the energy range of 2-8.5 keV. We find no significant excess of a peaked contribution to the total counting rate above the background model, and compare this observation to the recent DAMA results. In the framework of a conversion of a dark matter particle into electromagnetic energy, our 90% confidence level upper limit of 0.246events/kg/day at 3.15 keV is lower than the total rate above background observed by DAMA. In absence of any specific particle physics model to provide the scaling in cross section between NaI and Ge, we assume a Z2 scaling. With this assumption the observed rate in DAMA remains higher than the upper limit in CDMS. Under the conservative assumption that the modulation amplitude is 6% of the total rate we obtain upper limits on the modulation amplitude a factor of ∼2 lower than observed by DAMA, constraining some possible interpretations of this modulation. © 2010 The American Physical Society.

Published
2010

7. Dark matter search results from the CDMS II experiment.

Author

Ahmed Z, Akerib DS, Arrenberg S, Bailey CN, Balakishiyeva D, Baudis L, Bauer DA, Brink PL, Bruch T, Bunker R, Cabrera B, Caldwell DO, Cooley J, Cushman P, Daal M, DeJongh F, Dragowsky MR, Duong L, Fallows S, Figueroa-Feliciano E, Filippini J, Fritts M, Golwala SR, Grant DR, Hall J, Hennings-Yeomans R, Hertel SA, Holmgren D, Hsu L, Huber ME, Kamaev O, Kiveni M, Kos M, Leman SW, Mahapatra R, Mandic V, McCarthy KA, Mirabolfathi N, Moore D, Nelson H, Ogburn RW, Phipps A, Pyle M, Qiu X, Ramberg E, Rau W, Reisetter A, Saab T, Sadoulet B, Sander J, Schnee RW, Seitz DN, Serfass B, Sundqvist KM, Tarka M, Wikus P, Yellin S, Yoo J, Young BA, and Zhang J

Abstract

Astrophysical observations indicate that dark matter constitutes most of the mass in our universe, but its nature remains unknown. Over the past decade, the Cryogenic Dark Matter Search (CDMS II) experiment has provided world-leading sensitivity for the direct detection of weakly interacting massive particle (WIMP) dark matter. The final exposure of our low-temperature germanium particle detectors at the Soudan Underground Laboratory yielded two candidate events, with an expected background of 0.9 +/- 0.2 events. This is not statistically significant evidence for a WIMP signal. The combined CDMS II data place the strongest constraints on the WIMP-nucleon spin-independent scattering cross section for a wide range of WIMP masses and exclude new parameter space in inelastic dark matter models.

Published
2010
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