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21 results on '"Caldwell, D. O."'

1. Present Status of the SuperCDMS program

Author

Akerib, D. S., Bailey, C. N., Bauer, D. A., Brink, P. L., Bunker, R., Cabrera, B., Caldwell, D. O., Cooley, J., Cushman, P., DeJongh, F., Dragowsky, M. R., Duong, L., Figueroa-Feliciano, E., Filippini, J., Golwala, S. R., Grant, D. R., Hall, J., Hennings-Yeomans, R., Holmgren, D., Huber, M. E., Irwin, K. D., Mahapatra, R., Mirabolfathi, N., Nelson, H., Novak, L., Ogburn, R. W., Pyle, M., Qiu, X., Ramberg, E., Rau, W., Reisetter, A., Saab, T., Sadoulet, B., Sander, J., Schmitt, R. L., Schnee, R. W., Seitz, D. N., Serfass, B., Sundqvist, K. M., Tomada, A., Yellin, S., Yoo, J., and Young, B. A.

Published
2008
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2. Status of the Cryogenic Dark Matter Search Experiment

Author

Ahmed, Z., Akerib, D. S., Attisha, M. J., Bailey, C. N., Baudis, L., Bauer, D. A., Brink, P. L., Brusov, P. P., Bunker, R., Cabrera, B., Caldwell, D. O., Chang, C. L., Cooley, J., Crisler, M. B., Cushman, P., Daal, M., DeJongh, F., Dixon, R., Dragowsky, M. R., Duong, L., Ferril, R., Figueroa-Feliciano, E., Filippini, J., Gaitskell, R. J., Golwala, S. R., Grant, D. R., Hennings-Yeomans, R., Holmgren, D., Huber, M. E., Kamat, S., Leclercq, S., Mahapatra, R., Mandic, V., Meunier, P., Mirabolfathi, N., Nelson, H., Ogburn, R. W., Pyle, M., Qiu, X., Ramberg, E., Rau, W., Reisetter, A., Ross, R. R., Saab, T., Sadoulet, B., Sander, J., Schnee, R. W., Seitz, D. N., Serfass, B., Sundqvist, K. M., Thompson, J.-P. F., Wang, G., Yellin, S., Yoo, J., and Young, B. A.

Published
2008
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3. Dark Matter Search Results from the CDMS II Experiment

Author

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

Published
2010
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4. The first cryogenic dark matter experiment

Author

Barnes, Jr., P. D., Da Silva, A., Aubourg, É., Akerib, D. S., Bauer, D., Borden, D., Cabrera, B., Caldwell, D. O., Chugg, B., Cummings, A., Dougherty, B. L., Emes, J., Gray, M., Hale, D., Haller, E. E., Irwin, K. D., Lange, A. E., Lu, A., Margulies, S., Penn, M. J., Pomansky, A. A., Pritychenko, B. V., Ross, R. R., Sadoulet, B., Shutt, T., Smith, A., Smith, G., Stockwell, W., Taylor, J., White, S., Witherell, M., Wolgast, R. C., Yellin, S., and Young, B. A.

Published
1993
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5. Measurement of the photon structure functionF 2γ(x, Q2) in the region 0.2<Q 2<7 GeV2

Author

Aihara, H., Alston-Garnjost, M., Avery, R. E., Barbaro-Galtieri, A., Barker, A. R., Barnes, A. V., Barnett, B. A., Bauer, D. A., Bengtsson, H. -U., Bintinger, D. L., Bobbink, G. J., Bolognese, T. S., Bross, A. D., Buchanan, C. D., Buijs, A., Caldwell, D. O., Clark, A. R., Cowan, G. D., Crane, D. A., Dahl, O. I., Derby, K. A., Eastman, J. J., Eberhard, P. H., Edberg, T. K., Eisner, A. M., Enomoto, R., Erné, F. C., Fujii, T., Gary, J. W., Gorn, W., Hauptman, J. M., Hofmann, W., Huth, J. E., Hylen, J., Kamae, T., Kaye, H. S., Kees, K. H., Kenney, R. W., Kerth, L. T., Ko, W., Koda, R. I., Kofler, R. R., Kwong, K. K., Lander, R. L., Langeveld, W. G. J., Layter, J. G., Linde, F. L., Lindsey, C. S., Loken, S. C., Lu, A., Lu, X -Q., Lynch, G. R., Madaras, R. J., Maeshima, K., Magnuson, B. D., Marx, J. N., Masek, G. E., Mathis, L. G., Matthews, J. A. J., Maxfield, S. J., Melnikoff, S. O., Miller, E. S., Moses, W., McNeil, R. R., Nemethy, P., Nygren, D. R., Oddone, P. J., Paar, H. P., Park, D. A., Park, S. K., Pellett, D. E., Pripstein, M., Ronan, M. T., Ross, R. R., Rouse, F. R., Schwitkis, K. A., Sens, J. C., Shapiro, G., Shapiro, M. D., Shen, B. C., Slater, W. E., Smith, J. R., Steinman, J. S., Stevenson, M. L., Stork, D. H., Strauss, M. G., Sullivan, M. K., Takahashi, T., Thompson, J. R., Toge, N., Toutounchi, S., van Tyen, R., van Uitert, B., VanDalen, G. J., van Daalen Wetters, R. F., Vernon, W., Wagner, W., Wang, E. M., Wang, Y. X., Wayne, M. R., Wenzel, W. A., White, J. T., Williams, M. C. S., Wolf, Z. R., Yamamoto, H., Yellin, S. J., Zeitlin, C., Zhang, W -M., and TPC/Two-Gamma Collaboration

Published
1987
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6. Evidence of soft and collinear gluon emission ine + e − hadronic events

Author

Aihara, H., Alston-Garnjost, M., Avery, R. E., Barbaro-Galtieri, A., Barker, A. R., Barnett, B. A., Bauer, D. A., Bay, A., Bobbink, G. J., Buchanan, C. D., Buijs, A., Caldwell, D. O., Chao, H-Y., Chun, S-B., Clark, A. R., Cowan, G. D., Crane, D. A., Dahl, O. I., Daoudi, M., Derby, K. A., Eastman, J. J., Eberhard, P. H., Edberg, T. K., Eisner, A. M., Enomoto, R., Erné, F. C., Fairfield, K. H., Hauptman, J. M., Hofmann, W., Hylen, J., Kamae, T., Kaye, H. S., Kenney, R. W., Khacheryan, S., Kofler, R. R., Langeveld, W. G. J., Layter, J. G., Lin, W. T., Linde, F. L., Loken, S. C., Lynch, G. R., Madaras, R. J., Magnuson, B. D., Masek, G. E., Mathis, L. G., Matthews, J. A. J., Maxfield, S. J., Miller, E. S., Moses, W., Nygren, D. R., Oddone, P. J., Paar, H. P., Park, S. K., Pellett, D. E., Pripstein, M., Ronan, M. T., Ross, R. R., Rouse, F. R., Schwitkis, K. A., Sens, J. C., Shapiro, G., Shen, B. C., Smith, J. R., Steinman, J. S., Stephens, R. W., Stevenson, M. L., Stork, D. H., Strauss, M. G., Sullivan, M. K., Takahashi, T., Toutounchi, S., van Tyen, R., VanDalen, G. J., Vernon, W., Wagner, W., Wang, E. M., Wang, Y-X., Wenzel, W. A., Wolf, Z. R., Yamamoto, H., Yellin, S. J., Zeitlin, C., and TPC/Two-Gamma Collaboration

Published
1989
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15. Demonstration of surface electron rejection with interleaved germanium detectors for dark matter searches.

Author

Agnese, R., Anderson, A. J., Balakishiyeva, D., Basu Thakur, R., Bauer, D. A., Borgland, A., Brandt, D., Brink, P. L., Bunker, R., Cabrera, B., Caldwell, D. O., Cerdeno, D. G., Chagani, H., Cherry, M., Cooley, J., Cornell, B., Crewdson, C. H., Cushman, P., Daal, M., and Di Stefano, P. C. F.

Subjects
DARK matter, GERMANIUM detectors, SURFACE charges, ELECTRON-phonon interactions, EXPERIMENTS
Abstract

The SuperCDMS experiment in the Soudan Underground Laboratory searches for dark matter with a 9-kg array of cryogenic germanium detectors. Symmetric sensors on opposite sides measure both charge and phonons from each particle interaction, providing excellent discrimination between electron and nuclear recoils, and between surface and interior events. Surface event rejection capabilities were tested with two 210Pb sources producing ∼130 beta decays/hr. In ∼800 live hours, no events leaked into the 8-115 keV signal region, giving upper limit leakage fraction 1.7 × 10-5 at 90% C.L., corresponding to < 0.6 surface event background in the future 200-kg SuperCDMS SNOLAB experiment. [ABSTRACT FROM AUTHOR]

Published
2013
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18. First Direct Limits on Lightly Ionizing Particles with Electric Charge Less than e/6.

Author

Agnese, R., Anderson, A. J., Balakishiyeva, D., R. Basu Thakur, Bauer, D. A., Billard, J., Borgland, A., Bowles, M. A., Brandt, D., Brink, P. L., Bunker, R., Cabrera, B., Caldwell, D. O., Cerdeno, D. G., Chagani, H., Chen, Y., Cooley, J., Cornell, B., Crewdson, C. H., and Cushman, P.

Subjects
*IONIZATION (Atomic physics), *ELECTRIC charge, *CRYOGENICS, *DARK matter, *RELATIVISTIC electrons
Abstract

While the standard model of particle physics does not include free particles with fractional charge, experimental searches have not ruled out their existence. We report results from the Cryogenic Dark Matter Search (CDMS II) experiment that give the first direct-detection limits for cosmogenically produced relativistic particles with electric charge lower than e/6. A search for tracks in the six stacked detectors of each of two of the CDMS II towers finds no candidates, thereby excluding new parameter space for particles with electric charges between e/6 and e/200. [ABSTRACT FROM AUTHOR]

Published
2015
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19. Search for Low-Mass Weakly Interacting Massive Particles with SuperCDMS.

Author

Agnese, R., Anderson, A. J., Asai, M., Balakishiyeva, D., Basu Thakur, R., Bauer, D. A., Beaty, J., Billard, J., Borgland, A., Bowles, M. A., Brandt, D., Brink, P. L., Bunker, R., Cabrera, B., Caldwell, D. O., Cerdeno, D. G., Chagani, H., Chen, Y., Cherry, M., and Cooley, J.

Subjects
*WEAKLY interacting massive particles, *BOSONS, *PARTICLES (Nuclear physics), *AXIONS, *TENSOR algebra
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 < 30 GeV/c2, with the signal region blinded. Eleven events were observed after unblinding. We set an upper limit on the spin-independent WIMP-nucleon cross section of 1.2 × 10-42 cm2 at 8 GeV/ c2. This result is in tension with WIMP interpretations of recent experiments and probes new parameter space for WIMP-nucleon scattering for WIMP masses < 6 GeV/c2. [ABSTRACT FROM AUTHOR]

Published
2014
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20. Search for Low-Mass Weakly Interacting Massive Particles Using Voltage-Assisted Calorimetric Ionization Detection in the SuperCDMS Experiment.

Author

Agnese, R., Anderson, A. J., Asai, M., Balakishiyeva, D., Basu Thakur, R., Bauer, D. A., Billard, J., Borgland, A., Bowles, M. A., Brandt, D., Brink, P. L., Bunker, R., Cabrera, B., Caldwell, D. O., Cerdeno, D. G., Chagani, H., Cooley9, J., Cornell, B., Crewdson, C. H., and Cushman, P.

Subjects
*WEAKLY interacting massive particles, *DARK matter, *WAVE amplification, *IONIZATION energy, *PARTICLE interactions
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. [ABSTRACT FROM AUTHOR]

Published
2014
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21. Silicon Detector Dark Matter Results from the Final Exposure of CDMS II.

Author

Agnese, R., Ahmed, Z., Anderson, A. J., Arrenberg, S., Balakishiyeva, D., Basu Thakur, R., Bauer, D. A., Billard, J., Borgland, A., Brandt, D., Brink, P. L., Bruch, T., Bunker, R., Cabrera, B., Caldwell, D. O., Cerdeno, D. G., Chagani, H., Cooley, J., Cornell, B., and Crewdson, C. H.

Subjects
*SILICON detectors, *WEAKLY interacting massive particles, *NEUTRONS, *LEAD, *OBSERVED confidence levels (Statistics)
Abstract

We report results of a search for weakly interacting massive particles (WIMPS) with the silicon detectors of the CDMS II experiment. This blind analysis of 140.2 kg day of data taken between July 2007 and September 2008 revealed three WIMP-candidate events with a surface-event background estimate of 0.41-0.08+0.20(stat)-0.24+0.28(syst). Other known backgrounds from neutrons and 206Pb are limited to <0.13 and <0.08 events at the 90% confidence level, respectively. The exposure of this analysis is equivalent to 23.4 kg day for a recoil energy range of 7-100 keV for a WIMP of mass 10 GeV/c². The probability that the known backgrounds would produce three or more events in the signal region is 5.4%. A profile likelihood ratio test of the three events that includes the measured recoil energies gives a 0.19% probability for the known-background-only hypothesis when tested against the alternative WIMP + background hypothesis. The highest likelihood occurs for a WIMP mass of 8.6 GeV/c² and WIMP-nucleon cross section of 1.9 × 10-41 cm². [ABSTRACT FROM AUTHOR]

Published
2013
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