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1. Nuclear-recoil energy scale in CDMS II silicon dark-matter detectors

Author

X. Zhao, T. Binder, G.L. Godfrey, J. D. Morales Mendoza, R. Underwood, Martin E. Huber, Tarek Saab, K. Schneck, N. Mast, E. H. Miller, M. Pepin, R. Germond, Yi Chen, B. Welliver, J. Hall, A. W. Borgland, H. R. Harris, W. A. Page, Amy Roberts, Yu Kai Chang, S. Fallows, A. N. Villano, Betty A. Young, M. Ghaith, A. Kubik, R. W. Schnee, V. Iyer, S. M. Oser, R. Basu Thakur, Miguel Daal, H. A. Tanaka, S. J. Yellin, Tsuguo Aramaki, A. Phipps, Hassan Chagani, David G. Cerdeño, K. L. Page, T. Doughty, P. Lukens, S. Banik, R. Partridge, Robert A. Moffatt, Kevin A. McCarthy, John Wilson, B. Cornell, R. Calkins, E. Fascione, Sunil Golwala, P. Redl, Ziqing Hong, P. L. Brink, M. Stein, David Moore, M. Peñalver Martinez, Adam Anderson, M. J. Wilson, E. M. Dragowsky, J. K. Nelson, Donald J. Holmgren, C. Cartaro, W. Rau, David O. Caldwell, H. E. Rogers, M. A. Bowles, P. Cushman, J. Sander, S. Scorza, Danielle Speller, H. Qiu, P. Di Stefano, R. Agnese, J. Street, D. Balakishiyeva, L. Hsu, D. Toback, Matt Pyle, Bruno Serfass, Kartik Senapati, D. Jardin, R. Mahapatra, A. Leder, R. Bunker, A. Reisetter, D. MacDonell, C. Jena, G. Gerbier, L. Esteban, D. Barker, Jodi Cooley, M. H. Kelsey, D. A. Bauer, S. S. Poudel, W. Baker, J. J. Yen, Matthew Fritts, Vuk Mandic, X. Zhang, N. Mirabolfathi, Bedangadas Mohanty, A. Jastram, A. Kennedy, Blas Cabrera, Enectali Figueroa-Feliciano, E. Lopez Asamar, Noah Kurinsky, B. von Krosigk, Bernard Sadoulet, A. E. Robinson, and Douglas Wright

Subjects
Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Dark matter, FOS: Physical sciences, Electron, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Recoil, Ionization, 0103 physical sciences, Neutron, Physics::Atomic Physics, 010306 general physics, Nuclear Experiment, Instrumentation and Methods for Astrophysics (astro-ph.IM), Instrumentation, Physics, Elastic scattering, 010308 nuclear & particles physics, Instrumentation and Detectors (physics.ins-det), 3. Good health, Semiconductor detector, Cryogenic Dark Matter Search, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

The Cryogenic Dark Matter Search (CDMS II) experiment aims to detect dark matter particles that elastically scatter from nuclei in semiconductor detectors. The resulting nuclear-recoil energy depositions are detected by ionization and phonon sensors. Neutrons produce a similar spectrum of low-energy nuclear recoils in such detectors, while most other backgrounds produce electron recoils. The absolute energy scale for nuclear recoils is necessary to interpret results correctly. The energy scale can be determined in CDMS II silicon detectors using neutrons incident from a broad-spectrum $^{252}$Cf source, taking advantage of a prominent resonance in the neutron elastic scattering cross section of silicon at a recoil (neutron) energy near 20 (182) keV. Results indicate that the phonon collection efficiency for nuclear recoils is $4.8^{+0.7}_{-0.9}$% lower than for electron recoils of the same energy. Comparisons of the ionization signals for nuclear recoils to those measured previously by other groups at higher electric fields indicate that the ionization collection efficiency for CDMS II silicon detectors operated at $\sim$4 V/cm is consistent with 100% for nuclear recoils below 20 keV and gradually decreases for larger energies to $\sim$75% at 100 keV. The impact of these measurements on previously published CDMS II silicon results is small., Comment: 22 pages, 17 figures, 1 table, 1 appendix

Published
2018

2. Results from the Super Cryogenic Dark Matter Search Experiment at Soudan

Author

Tarek Saab, N. Mast, A. N. Villano, S. M. Oser, P. L. Brink, C. Cartaro, T. Reynolds, H. R. Harris, D. A. Bauer, W. A. Page, B. Welliver, S. S. Poudel, W. Baker, N. Mirabolfathi, Enectali Figueroa-Feliciano, R. Partridge, A. Kennedy, J. J. Yen, Jodi Cooley, Blas Cabrera, Betty A. Young, B. Cornell, Chitrasen Jena, D. H. Wright, D. Balakishiyeva, A. Phipps, S. Banik, Eric W. Hoppe, J. D. Morales Mendoza, Noah Kurinsky, Xingbo Zhao, A. E. Robinson, Yu Kai Chang, T. Binder, S. Scorza, Matthew Fritts, D. Barker, Bernard Sadoulet, Vuk Mandic, Sunil Golwala, I. J. Arnquist, G. Godfrey, Amy Roberts, P. Di Stefano, Martin E. Huber, M. H. Kelsey, S. J. Yellin, Tsuguo Aramaki, D. Jardin, John Wilson, M. Stein, D. O. Caldwell, L. Hsu, P. Cushman, E. Lopez Asamar, R. Agnese, R. Underwood, D. Toback, J. Hall, Miguel Daal, J. K. Nelson, X. Zhang, M. Peñalver Martinez, Bedangadas Mohanty, Matt Pyle, M. A. Bowles, B. von Krosigk, A. Jastram, Kartik Senapati, J. Sander, Hiromasa Tanaka, John L. Orrell, D. MacDonell, K. Schneck, E. Fascione, M. Pepin, V. Iyer, R. W. Schnee, R. Basu Thakur, K. L. Page, R. Calkins, T. Doughty, H. E. Rogers, H. Qiu, P. Redl, B. Loer, B. Serfass, E. H. Miller, R. Germond, Yi Chen, P. Lukens, Ziqing Hong, M. J. Wilson, Danielle Speller, M. Ghaith, A. Kubik, R. Mahapatra, J. Street, David G. Cerdeño, G. Gerbier, R. Bunker, A. Reisetter, and W. Rau

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, Weakly interacting massive particles, 0103 physical sciences, General Physics and Astronomy, Cryogenic Dark Matter Search, 010306 general physics, 01 natural sciences, Event (particle physics)
Abstract

We report the result of a blinded search for weakly interacting massive particles (WIMPs) using the majority of the SuperCDMS Soudan data set. With an exposure of 1690 kg d, a single candidate event is observed, consistent with expected backgrounds. This analysis (combined with previous Ge results) sets an upper limit on the spin-independent WIMP–nucleon cross section of 1.4×10−44 (1.0×10−44) cm2 at 46 GeV/c2. These results set the strongest limits for WIMP–germanium-nucleus interactions for masses >12 GeV/c2.

Published
2018
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3. New Results from the Search for Low-Mass Weakly Interacting Massive Particles with the CDMS Low Ionization Threshold Experiment

Author

B. Welliver, B. Shank, Matt Pyle, J. J. Yen, D. Barker, B. Loer, J. Hall, T. Doughty, B. Serfass, G. L. Godfrey, D. Jardin, R. Agnese, R. Basu Thakur, K. L. Page, Jodi Cooley, R. Calkins, H. R. Harris, N. Mirabolfathi, W. A. Page, Yi Chen, David G. Cerdeño, T. Hofer, D. Balakishiyeva, Y. Ricci, L. Esteban, R. Bunker, J. Zhang, J. D. Morales Mendoza, A. Jastram, M. Asai, A. Reisetter, Miguel Daal, S. Fallows, W. Rau, H. E. Rogers, P. Redl, Sunil Golwala, A. Kennedy, Martin E. Huber, D. A. Bauer, S. J. Yellin, Tsuguo Aramaki, H. Qiu, W. Baker, John Wilson, Blas Cabrera, Tarek Saab, N. Mast, Bernard Sadoulet, Robert A. Moffatt, E. Lopez Asamar, Amy Roberts, A. Borgland, Vuk Mandic, O. Kamaev, K. Prasad, A. Leder, B. Cornell, S. Upadhyayula, R. Underwood, J. Billard, M. Pepin, R. Partridge, Enectali Figueroa-Feliciano, R. W. Schnee, P. Cushman, M. H. Kelsey, Betty A. Young, A. Phipps, J. Sander, L. Hsu, D. Toback, M. Ghaith, P. Lukens, B. Kara, Adam Anderson, R. Mahapatra, H. Chagani, Donald J. Holmgren, Danielle Speller, M. A. Bowles, K. Schneck, D. H. Wright, P. L. Brink, David O. Caldwell, A. N. Villano, S. M. Oser, S. Scorza, and P. Di Stefano

Subjects
Physics, Particle physics, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Phonon, Astrophysics::Instrumentation and Methods for Astrophysics, General Physics and Astronomy, Astrophysics::Cosmology and Extragalactic Astrophysics, Electron, Parameter space, 01 natural sciences, Semiconductor detector, Nuclear physics, WIMP, Weakly interacting massive particles, Ionization, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Low Mass
Abstract

© 2016 American Physical Society. 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/c2.

Published
2016
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4. Scalability study of solid xenon

Author

D. Markley, W. Jaskierny, T. Saab, H. Cease, Mykhaylo Filipenko, D. Balakishiyeva, R. B. Pahlka, and J. Yoo

Subjects
Cryostat, Materials science, Physics - Instrumentation and Detectors, business.industry, chemistry.chemical_element, FOS: Physical sciences, Cryogenics, Instrumentation and Detectors (physics.ins-det), Liquid nitrogen, Particle detector, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Chiller boiler system, Xenon, chemistry, Phase (matter), Scalability, Optoelectronics, business, Instrumentation, Mathematical Physics
Abstract

We report a demonstration of the scalability of optically transparent xenon in the solid phase for use as a particle detector above a kilogram scale. We employed a cryostat cooled by liquid nitrogen combined with a xenon purification and chiller system. A modified {\it Bridgeman's technique} reproduces a large scale optically transparent solid xenon., arXiv admin note: substantial text overlap with arXiv:1410.6496

Published
2015

5. Search for low-mass weakly interacting massive particles with SuperCDMS

Author

B. Shank, Betty A. Young, D. Brandt, A. Leder, B. Loer, J. Beaty, B. Serfass, S. Upadhyayula, R. Agnese, A. Phipps, T. Hofer, D. Balakishiyeva, H. Chagani, R. Mahapatra, A. Jastram, A. Kennedy, Miguel Daal, R. Bunker, Y. Ricci, R. H. Nelson, S. Fallows, D. N. Seitz, Blas Cabrera, M. Platt, R. Partridge, A. Reisetter, H. R. Harris, M. Kiveni, L. Esteban, E. Lopez Asamar, S. Scorza, Matt Pyle, S. A. Hertel, B. Welliver, Yan Chen, W. Rau, R. Basu Thakur, A. W. Borgland, K. Koch, K. L. Page, Cristián Martínez, Vuk Mandic, J. Sander, K. Prasad, P. Di Stefano, L. Novak, Jodi Cooley, M. H. Kelsey, Danielle Speller, N. Mirabolfathi, Douglas Wright, S. J. Yellin, David G. Cerdeño, B. Kara, M. A. Bowles, M. Ruschman, A. N. Villano, Robert A. Moffatt, R. Resch, B. A. Hines, Sissel Hansen, O. Kamaev, E. Do Couto E Silva, G. Godfrey, J. Zhang, D. Devaney, L. Hsu, Kevin A. McCarthy, S. Kenany, P. Redl, M. Asai, T. Doughty, Adam Anderson, J. Hall, J. J. Yen, J. Billard, B. Cornell, C. H. Crewdson, Donald J. Holmgren, M. Pepin, Bernard Sadoulet, R. Schmitt, D. A. Bauer, Enectali Figueroa-Feliciano, Tarek Saab, Martin E. Huber, P. Cushman, K. Schneck, R. W. Schnee, P. L. Brink, David O. Caldwell, M. Cherry, Sunil Golwala, H. Qiu, and Astrid Tomada

Subjects
Nuclear physics, Physics, Particle physics, WIMP, Scattering, Weakly interacting massive particles, Signal region, Dark matter, General Physics and Astronomy, Parameter space, Low Mass
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
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6. Detector Fabrication Yield for SuperCDMS Soudan

Author

W. Rau, Blas Cabrera, J. Hall, Matthew Fritts, Vuk Mandic, D. Balakishiyeva, S. Scorza, B. Welliver, B. A. Hines, S. A. Hertel, Miguel Daal, A. N. Villano, Sunil Golwala, N. Mirabolfathi, E. Do Couto E Silva, Enectali Figueroa-Feliciano, M. Cherry, D. A. Bauer, Kevin A. McCarthy, J. J. Yen, P. L. Brink, J. Zhang, B. Shank, Matt Pyle, R. Radpour, A. Reisetter, Bernard Sadoulet, H. Qiu, J. Beaty, B. Kara, J. Sander, Bruno Serfass, R. Resch, O. Kamaev, S. Kenany, R. Mahapatra, Astrid Tomada, T. Doughty, R. H. Harris, Jodi Cooley, Steven W. Leman, R. Partridge, Betty A. Young, P. Cushman, Tarek Saab, R. W. Schnee, Martin E. Huber, R. Schmitt, G. Godfrey, L. Hsu, D. Brandt, L. Novak, Adam Anderson, H. Chagani, and D. N. Seitz

Subjects
Physics, Fabrication, Yield (engineering), business.industry, Detector, Dark matter, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, Underground laboratory, Interdigitated electrode, Optoelectronics, General Materials Science, Direct search, business
Abstract

The SuperCDMS collaboration is presently operating a 9 kg Ge payload at the Soudan Underground Laboratory in their direct search for dark matter. The Ge detectors utilize double-sided athermal phonon sensors with an interdigitated electrode structure (iZIPs) to reject near-surface electron-recoil events. These detectors each have a mass of 0.6 kg and were fabricated with photolithographic techniques. The detector fabrication advances required and the production yield encountered are described.

Published
2014
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7. Silicon detector dark matter results from the final exposure of CDMS II

Author

Matthew Fritts, Jeffrey P. Filippini, G.L. Godfrey, Jodi Cooley, M. H. Kelsey, Vuk Mandic, K. Prasad, S. A. Hertel, P. L. Brink, David O. Caldwell, Y. Ricci, T. Hofer, P. Nadeau, Steven W. Leman, M. Kos, B. Shank, D. Balakishiyeva, Martin E. Huber, Donald J. Holmgren, P. Cushman, J. Sander, K. Koch, A. W. Borgland, C. H. Crewdson, D. A. Bauer, L. Esteban, Miguel Daal, R. Basu Thakur, R. Partridge, A. Jastram, K. L. Page, S. Scorza, P. Redl, B. Loer, J. Hall, B. Serfass, R. H. Harris, Cristián Martínez, David Moore, Robert A. Moffatt, Bernard Sadoulet, S. Arrenberg, P. Kim, K. Schneck, J. J. Yen, H. Qiu, B. Kara, Z. Ahmed, R. Bunker, A. N. Villano, T. Bruch, B. Welliver, Betty A. Young, Sunil Golwala, A. Kennedy, Danielle Speller, David G. Cerdeño, N. Mirabolfathi, Douglas Wright, A. Reisetter, B. Cornell, Blas Cabrera, A. Phipps, K. M. Sundqvist, L. Hsu, W. Rau, R. Mahapatra, Kevin A. McCarthy, H. Chagani, R. W. Schnee, J. Fox, O. Kamaev, J. Zhang, F. DeJongh, E. Do Couto E Silva, Adam Anderson, D. Brandt, R. Agnese, S. Fallows, Enectali Figueroa-Feliciano, M. Kiveni, S. J. Yellin, Matt Pyle, E. Lopez Asamar, Tarek Saab, J. Yoo, J. Billard, M. Pepin, R. H. Nelson, T. Doughty, and UAM. Departamento de Física Teórica

Subjects
Particle physics, Physics - Instrumentation and Detectors, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Dark matter, FOS: Physical sciences, General Physics and Astronomy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Recoil, WIMP, 0103 physical sciences, Neutron, 010306 general physics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Physics, 010308 nuclear & particles physics, Física, Instrumentation and Detectors (physics.ins-det), Confidence interval, Semiconductor detector, Likelihood-ratio test, Weakly interacting massive particles, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
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-days of data taken between July 2007 and September 2008 revealed three WIMP-candidate events with a surface-event background estimate of 0.41^{+0.20}_{-0.08}(stat.)^{+0.28}_{-0.24}(syst.). Other known backgrounds from neutrons and 206Pb are limited to < 0.13 and, 5 pages, 4 figures, as accepted by PRL

Published
2013

8. Demonstration of surface electron rejection with interleaved germanium detectors for dark matter searches

Author

C. J. Kenney, R. Partridge, R. Mahapatra, S. Fallows, R. Basu Thakur, S. Kenany, T. Doughty, Jodi Cooley, Adam Anderson, Jean-Paul Fox, K. L. Page, B. Shank, A. Jastram, D. A. Bauer, S. A. Hertel, Enectali Figueroa-Feliciano, K. Schneck, Jie Zhang, B. Loer, B. Serfass, H. R. Harris, S. J. Yellin, E. Lopez Asamar, O. Kamaev, L. Esteban, B. Kara, S. Scorza, P. Nadeau, A. Phipps, A. Kennedy, Jasmine Hasi, A. N. Villano, Danielle Speller, P. L. Brink, R. Resch, R. W. Schnee, M. H. Kelsey, Matthew Fritts, Y. Ricci, David G. Cerdeño, R. Radpour, B. Cornell, Blas Cabrera, Vuk Mandic, B. Welliver, R. Schmitt, David O. Caldwell, P. Redl, Sunil Golwala, P. Cushman, M. Kiveni, K. Prasad, Tarek Saab, Matt Pyle, Cristián Martínez, Donald J. Holmgren, Kevin A. McCarthy, P. C. F. Di Stefano, Betty A. Young, E. Do Couto E Silva, C. H. Crewdson, A. W. Borgland, T. Hofer, D. Balakishiyeva, M. Daal, R. Bunker, B. A. Hines, Robert A. Moffatt, Bernard Sadoulet, A. Reisetter, R. Nelson, David Moore, W. Rau, N. Mirabolfathi, R. Agnese, M. Pepin, J. J. Yen, M. Cherry, J. Sander, J. Hall, Astrid Tomada, M. E. Huber, D. Wright, H. Chagani, K. Koch, L. Novak, D. N. Seitz, H. Qiu, G. Godfrey, L. Hsu, D. Brandt, UAM. Departamento de Física Teórica, Massachusetts Institute of Technology. Department of Physics, Anderson, Adam Jonathan, Figueroa-Feliciano, Enectali, Hertel, Scott Alexander, and McCarthy, Kevin Ahmad

Subjects
Particle physics, Ionization, Technology, Physics - Instrumentation and Detectors, Physics and Astronomy (miscellaneous), astro-ph.GA, Dark matter, FOS: Physical sciences, chemistry.chemical_element, Cosmic ray, Germanium, Electron, Cryogenics, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Engineering, 0103 physical sciences, 010306 general physics, Electrodes, physics.ins-det, Leakage (electronics), Applied Physics, Physics, 010308 nuclear & particles physics, hep-ex, Detector, Física, Instrumentation and Detectors (physics.ins-det), Astrophysics - Astrophysics of Galaxies, Semiconductor detector, chemistry, Lead, Astrophysics of Galaxies (astro-ph.GA), Physical Sciences, Surface ionization
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 [superscript 210] Pb 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[superscript −5] at 90% C.L., corresponding to, United States. Dept. of Energy (Contract No. DE-AC03-76SF00098), United States. Dept. of Energy (Contract No. DE-FG02-92ER40701), United States. Dept. of Energy (Contract No. DE-FG02-94ER40823), United States. Dept. of Energy (Contract No. DE-FG03-90ER40569), United States. Dept. of Energy (Contract No. DE-FG03-91ER40618), United States. Dept. of Energy (Contract No. DE-SC0004022), National Science Foundation (U.S.) (Grant No. AST-9978911), National Science Foundation (U.S.) (Grant No. NSF-0847342), National Science Foundation (U.S.) (Grant No. PHY-1102795), National Science Foundation (U.S.) (Grant No. NSF-1151869), National Science Foundation (U.S.) (Grant No. PHY-0542066), National Science Foundation (U.S.) (Grant No. PHY-0503729), National Science Foundation (U.S.) (Grant No. PHY-0503629), National Science Foundation (U.S.) (Grant No. PHY-0503641), National Science Foundation (U.S.) (Grant No. PHY-0504224), National Science Foundation (U.S.) (Grant No. PHY-0705052), National Science Foundation (U.S.) (Grant No. PHY-0801708), National Science Foundation (U.S.) (Grant No. PHY-0801712), National Science Foundation (U.S.) (Grant No. PHY-0802575), National Science Foundation (U.S.) (Grant No. PHY-0847342), National Science Foundation (U.S.) (Grant No. PHY-0855299), National Science Foundation (U.S.) (Grant No. PHY-0855525), National Science Foundation (U.S.) (Grant No. PHY-1205898)

Published
2013
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9. Publisher’s Note: Silicon detector results from the first five-tower run of CDMS II [Phys. Rev. D88, 031104(R) (2013)]

Author

B. Welliver, A. N. Villano, E. Do Couto E Silva, D. Brandt, Kevin A. McCarthy, F. DeJongh, K. Koch, J. Hall, P. Redl, L. Hsu, David Moore, W. Rau, R. H. Harris, R. H. Nelson, Jeffrey P. Filippini, Tarek Saab, G.L. Godfrey, Douglas Wright, S. Scorza, J. Sander, Sunil Golwala, P. Di Stefano, Martin E. Huber, D. O. Caldwell, Betty A. Young, A. W. Borgland, R. Mahapatra, J. Zhang, A. Phipps, K. M. Sundqvist, Danielle Speller, Robert A. Moffatt, R. Basu Thakur, K. L. Page, K. Schneck, C. H. Crewdson, Donald J. Holmgren, R. Agnese, M. Pepin, Y. Ricci, Adam Anderson, S. Arrenberg, R. Bunker, P. L. Brink, Peter S. Kim, L. Esteban, S. A. Hertel, Cristián Martínez, M. Kos, P. Nadeau, Z. Ahmed, David G. Cerdeño, J. Yoo, H. Chagani, Bernard Sadoulet, S. J. Yellin, B. Kara, R. Partridge, R. W. Schnee, Steven W. Leman, B. Cornell, P. Cushman, H. Qiu, Jodi Cooley, M. H. Kelsey, T. Hofer, D. Balakishiyeva, Miguel Daal, Enectali Figueroa-Feliciano, T. Doughty, O. Kamaev, M. Pyle, J. J. Yen, Jean-Paul Fox, B. Shank, S. Fallows, A. Kennedy, Blas Cabrera, N. Mirabolfathi, T. Bruch, Bruno Serfass, M. Kiveni, A. Jastram, A. Reisetter, Matthew Fritts, E. Lopez-Asamar, Vuk Mandic, K. Prasad, and D. A. Bauer

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Dark matter, Silicon detector, Tower (mathematics)
Published
2013
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10. SuperCDMS status from Soudan and plans for SNOLab

Author

K. L. Page, W. Rau, N. Mirabolfathi, B. Loer, B. Serfass, R. Bunker, Donald J. Holmgren, A. Reisetter, S. A. Hertel, R. Mahapatra, J. Yoo, R. Moffat, K. Koch, S. Scorza, Tarek Saab, A. Jastram, Jasmine Hasi, B. Kara, R. Resch, C. H. Crewdson, R. H. Nelson, Adam Anderson, P. Di Stefano, P. Nadeau, Blas Cabrera, B. Shank, M. Kiveni, D. O. Caldwell, A. N. Villano, G.L. Godfrey, J. Zhang, Matt Pyle, S. Liu, S. Arrenberg, X. Qiu, Bernard Sadoulet, Matthew Fritts, Vuk Mandic, Martin E. Huber, J. Sander, K. Prasad, Kevin A. McCarthy, Jodi Cooley, M. H. Kelsey, Betty A. Young, J. Hall, D. Brandt, L. Hsu, M. Pepin, Y. Ricci, A. Phipps, K. M. Sundqvist, Peter S. Kim, David Moore, Cristián Martínez, T. Doughty, Danielle Speller, D. A. Bauer, R. Radpour, H. Qiu, B. Cornell, B. Welliver, R. Partridge, T. Hofer, L. Esteban, D. Balakishiyeva, M. Kos, Miguel Daal, Enectali Figueroa-Feliciano, E. Do Couto E Silva, S. Fallows, S. J. Yellin, P. L. Brink, K. Shneck, H. Chagani, Sunil Golwala, R. B. Thakur, J. Fox, Steven W. Leman, P. Cushman, R. W. Schnee, David G. Cerdeño, O. Kamaev, J. J. Yen, Z. Ahmed, Szczerbinska, B., Babu, K., Balantekin, B., Dutta, B., Mohapatra, R., Szczerbinska, Barbara, Babu, Kaladi, Balantekin, Baha, Dutta, Bhaskar, and Mohapatra, Rabindra N.

Subjects
Physics, Physics::Instrumentation and Detectors, media_common.quotation_subject, Dark matter, Astrophysics::Instrumentation and Methods for Astrophysics, Elementary particle, Cosmological constant, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Cosmology, Universe, WIMP, Weakly interacting massive particles, Light dark matter, media_common
Abstract

Matter, as we know it, makes up less than 5% of the Universe. Various astrophysical observations have confirmed that one quarter of the Universe and most of the matter content in the Universe is made up of Dark Matter. The nature of Dark Matter is yet to be discovered and is one of the biggest questions in Physics. Particle Physics combined with astrophysical measurements of the abundance gives rise to a Dark Matter candidate called Weakly Interacting Massive Particle (WIMP). The low density of WIMPs in the galaxies and the extremely weak nature of the interaction with ordinary matter make detection of the WIMP an extraordinarily challenging task, with abundant fakes from various radioactive and cosmogenic backgrounds with much stronger electromagnetic interaction. The extremely weak nature of the WIMP interaction dictates detectors that have extremely low naturally occurring radioactive background, a large active volume (mass) of sensitive detector material to maximize statistics, a highly efficient detector based rejection mechanism for the dominant electromagnetic background and sophisticated analysis techniques to reject any residual background. This paper describes the status of the SuperCDMS experiment.

Published
2013

11. Silicon detector results from the first five-tower run of CDMS II

Author

Y. Ricci, O. Kamaev, Jeffrey P. Filippini, B. Welliver, G.L. Godfrey, Peter S. Kim, Cristián Martínez, B. Cornell, Martin E. Huber, A. W. Borgland, R. H. Nelson, E. Do Couto E Silva, Steven W. Leman, K. Koch, P. L. Brink, S. Scorza, M. Kiveni, Matt Pyle, T. Hofer, P. Cushman, T. Doughty, David O. Caldwell, D. Balakishiyeva, B. Kara, P. Di Stefano, S. Fallows, Adam Anderson, A. Jastram, A. N. Villano, S. J. Yellin, M. Kos, J. Sander, Tarek Saab, Miguel Daal, Robert A. Moffatt, Sunil Golwala, David G. Cerdeño, J. Hall, S. A. Hertel, Donald J. Holmgren, Kevin A. McCarthy, F. DeJongh, R. Partridge, R. Agnese, S. Arrenberg, P. Nadeau, J. Fox, K. Schneck, Danielle Speller, M. Pepin, R. W. Schnee, N. Mirabolfathi, H. Chagani, L. Hsu, Douglas Wright, R. Mahapatra, Jodi Cooley, J. Zhang, R. Basu Thakur, M. H. Kelsey, K. L. Page, R. H. Harris, J. Yoo, Betty A. Young, L. Esteban, A. Phipps, K. M. Sundqvist, R. Bunker, H. Qiu, T. Bruch, A. Reisetter, W. Rau, D. Brandt, D. A. Bauer, Z. Ahmed, Matthew Fritts, E. Lopez-Asamar, Vuk Mandic, K. Prasad, P. Redl, David Moore, J. J. Yen, B. Shank, B. Serfass, C. H. Crewdson, A. Kennedy, Blas Cabrera, Bernard Sadoulet, Enectali Figueroa-Feliciano, and UAM. Departamento de Física Teórica

Subjects
Nuclear and High Energy Physics, Particle physics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Physics::Instrumentation and Detectors, Dark matter, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Parameter space, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), WIMP, 0103 physical sciences, 010306 general physics, Physics, Elastic scattering, Range (particle radiation), 010308 nuclear & particles physics, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Física, Semiconductor detector, Weakly interacting massive particles, High Energy Physics::Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAM, We report results of a search for weakly interacting massive particles (WIMPs) with the Si detectors of the CDMS II experiment. This report describes a blind analysis of the first data taken with CDMS II’s full complement of detectors in 2006–2007; results from this exposure using the Ge detectors have already been presented. We observed no candidate WIMP-scattering events in an exposure of 55.9 kg-days before analysis cuts, with an expected background of ˞1.1 events. The exposure of this analysis is equivalent to 10.3 kg-days over a recoil energy range of 7–100 keV for an ideal Si detector and a WIMP mass of 10 GeV/c2. These data set an upper limit of 1.7 x 10-41 cm2 on the WIMP-nucleon spin-independent cross section of a 10 GeV/c2 WIMP. These data exclude parameter space for spin-independent WIMP-nucleon elastic scattering that is relevant to recent searches for low-mass WIMPs, This work is supported in part by the National Science Foundation (Grants No. AST-9978911, No. NSF-1102795, No. PHY- 0847342, No. PHY-0542066, No. PHY-0503729, No. PHY- 0503629, No. PHY-0503641, No. PHY-0504224, No. PHY-0705052, No. PHY-0801708, No. PHY-0801712, No. PHY-0802575, No. PHY-0847342, No. PHY-0855299, No. PHY-0855525, No. PHY-1151869, and No. PHY- 1205898), by the Department of Energy (Contracts No. DE-AC03-76SF00098, No. DE-FG02-92ER40701, No. DE-FG03-90ER40569, No. DE-FG03-91ER40618, and No. DE-SC0004022), by the Swiss National Foundation (SNF Grant No. 20-118119), by NSERC Canada (Grants No. SAPIN 341314 and No. SAPPJ 386399), and by MULTIDARK CSD2009-00064 and FPA2012-34694. Fermilab is operated by Fermi Research Alliance, LLC under Contract No. De-AC02-07CH11359, while SLAC is operated under Contract No. DE-AC02- 76SF00515 with the U.S. Department of Energy

Published
2013

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

Author

Jie Zhang, Jeffrey P. Filippini, S. A. Hertel, M. R. Dragowsky, R. Resch, L. Duong, Martin E. Huber, M. Pyle, Tarek Saab, S. Fallows, Donald J. Holmgren, S. J. Yellin, Betty A. Young, E. J. Ramberg, X. Qiu, L. Hsu, K. M. Sundqvist, H. N. Nelson, S. W. Leman, S. Arrenberg, David Moore, J. Hall, Bernard Sadoulet, M. Razeti, O. Kamaev, R. Bunker, M. Kiveni, R. Hennings-Yeomans, J. Sander, A. Reisetter, Kevin A. McCarthy, C. N. Bailey, W. Rau, S. Liu, P. L. Brink, David O. Caldwell, Enectali Figueroa-Feliciano, E. Do Couto E Silva, R. W. Ogburn, J. Yoo, D. N. Seitz, D. Balakishiyeva, N. Mirabolfathi, John Fox, M. Kos, P. C. F. Di Stefano, A. Phipps, Sunil Golwala, D. S. Akerib, P. Wikus, B. Serfass, R. Mahapatra, F. DeJongh, Blas Cabrera, Matthew Fritts, Vuk Mandic, D. A. Bauer, Jodi Cooley, M. Tarka, R. W. Schnee, Z. Ahmed, P. Cushman, T. Bruch, Laura Baudis, and M. Daal

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Cosmology and Nongalactic Astrophysics (astro-ph.CO), Energy window, 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, Dark matter, FOS: Physical sciences, Parameter space, Recoil energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Underground laboratory, Cryogenic Dark Matter Search, 010306 general physics, Astrophysics - Cosmology and Nongalactic Astrophysics
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., 10 pages, 10 figures, minor changes to match published version, conclusion unchanged

Published
2011

13. Results from a low-energy analysis of the CDMS II germanium data

Author

H. N. Nelson, Z. Ahmed, Laura Baudis, D. Balakishiyeva, Steven W. Leman, P. Cushman, S. Liu, C. N. Bailey, E. Do Couto E Silva, Miguel Daal, M. R. Dragowsky, R. W. Schnee, Enectali Figueroa-Feliciano, David Moore, M. Kiveni, E. J. Ramberg, N. Mirabolfathi, J. Hall, M. Pyle, S. Arrenberg, L. Hsu, T. Bruch, Bernard Sadoulet, O. Kamaev, Kevin A. McCarthy, R. Hennings-Yeomans, Jeffrey P. Filippini, P. L. Brink, F. DeJongh, Blas Cabrera, David O. Caldwell, M. Kos, L. Duong, Martin E. Huber, J. Yoo, P. Di Stefano, D. A. Bauer, B. Serfass, Jodi Cooley, J. Sander, M. Tarka, Betty A. Young, Tarek Saab, K. M. Sundqvist, Matthew Fritts, Vuk Mandic, A. Phipps, S. A. Hertel, Jie Zhang, Sunil Golwala, X. Qiu, D. S. Akerib, J. Fox, R. Resch, R. Mahapatra, S. Fallows, Donald J. Holmgren, S. J. Yellin, P. Wikus, D. N. Seitz, R. Bunker, A. Reisetter, W. Rau, and R. W. Ogburn

Subjects
Particle physics, General Physics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), CDMS Collaboration, Physics::Instrumentation and Detectors, Dark matter, FOS: Physical sciences, General Physics and Astronomy, chemistry.chemical_element, Germanium, Parameter space, 01 natural sciences, Mathematical Sciences, Particle detector, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Engineering, WIMP, 0103 physical sciences, 010306 general physics, Physics, 010308 nuclear & particles physics, hep-ex, Astrophysics::Instrumentation and Methods for Astrophysics, Semiconductor detector, chemistry, Weakly interacting massive particles, Physical Sciences, astro-ph.CO, High Energy Physics::Experiment, Cryogenic Dark Matter Search, Astrophysics - Cosmology and Nongalactic Astrophysics
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., 9 pages, 8 figures. Supplemental material included as ancillary files. v3) Added appendix with additional details regarding energy scale and backgrounds

Published
2011
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14. Combined limits on WIMPs from the CDMS and EDELWEISS experiments

Author

Jeffrey P. Filippini, S. Henry, K. Eitel, Tarek Saab, P. Pari, M. R. Dragowsky, S. Hervé, E. Olivieri, N. Mirabolfathi, Steven W. Leman, P. Cushman, S. V. Rozov, M. A. Verdier, L. Bergé, R. W. Schnee, Martin E. Huber, Kevin A. McCarthy, D. O. Caldwell, F. DeJongh, A. S. Torrento-Coello, J. Hall, Enectali Figueroa-Feliciano, S. Arrenberg, Laura Baudis, D. Balakishiyeva, S. Fallows, Alain Benoit, P. Coulter, Y. Ricci, P. Wikus, G. Chardin, X. Defay, S. J. Yellin, R. Bunker, J. Domange, Miguel Daal, O. Kamaev, D. A. Bauer, B. Paul, A. Broniatowski, H. N. Nelson, A. Reisetter, Blas Cabrera, Cristián Martínez, S. Liu, P. L. Brink, H. Kluck, B. Censier, Z. Ahmed, W. Rau, M. Kos, V. A. Kudryavtsev, S. Scorza, J. Gascon, S. A. Hertel, G. A. Cox, Bernard Sadoulet, D. Filosofov, Y. Dolgorouki, P. Di Stefano, T. Bruch, Bruno Serfass, J. Gironnet, D. N. Seitz, P. Nadeau, E. Armengaud, R. J. Walker, L. Pattavina, R. Hennings-Yeomans, H. Kraus, M. Tarka, Max Robinson, C. Augier, M. Kiveni, M. Gros, P. Loaiza, F. Charlieux, X. Qiu, A. Phipps, R. W. Ogburn, Sunil Golwala, X. F. Navick, C. N. Bailey, M. De Jesus, D. S. Akerib, J. Fox, J. Blümer, E. Yakushev, A. Juillard, M. Pyle, L. Hsu, Jie Zhang, V. Kozlov, Jodi Cooley, Matthew Fritts, Vuk Mandic, B. Schmidt, V.B. Brudanin, M. Chapellier, L. Vagneron, N. Fourches, S. Marnieros, J. Yoo, David Moore, R. Mahapatra, Donald J. Holmgren, J. Sander, C. Nones, Betty A. Young, K. M. Sundqvist, G. Gerbier, V. Sanglard, S. Semikh, L. Dumoulin, Ahmed, Z, Akerib, D, Armengaud, E, Arrenberg, S, Augier, C, Bailey, C, Balakishiyeva, D, Baudis, L, Bauer, D, Benoit, A, Berge, L, Bluemer, J, Brink, P, Broniatowski, A, Bruch, T, Brudanin, V, Bunker, R, Cabrera, B, Caldwell, D, Censier, B, Chapellier, M, Chardin, G, Charlieux, F, Cooley, J, Coulter, P, Cox, G, Cushman, P, Daal, M, Defay, X, De Jesus, M, Dejongh, F, Di Stefano, P, Dolgorouki, Y, Domange, J, Dumoulin, L, Dragowsky, M, Eitel, K, Fallows, S, Figueroa Feliciano, E, Filippini, J, Filosofov, D, Fourches, N, Fox, J, Fritts, M, Gascon, J, Gerbier, G, Gironnet, J, Golwala, S, Gros, M, Hall, J, Hennings Yeomans, R, Henry, S, Hertel, S, Herve, S, Holmgren, D, Hsu, L, Huber, M, Juillard, A, Kamaev, O, Kiveni, M, Kluck, H, Kos, M, Kozlov, V, Kraus, H, Kudryavtsev, V, Leman, S, Liu, S, Loaiza, P, Mahapatra, R, Mandic, V, Marnieros, S, Martinez, C, Mccarthy, K, Mirabolfathi, N, Moore, D, Nadeau, P, Navick, X, Nelson, H, Nones, C, Ogburn, R, 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, R, Scorza, S, Seitz, D, Semikh, S, Serfass, B, Sundqvist, K, Tarka, M, Torrento Coello, A, Vagneron, L, Verdier, M, Walker, R, Wikus, P, Yakushev, E, Yellin, S, Yoo, J, Young, B, Zhang, J, Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire Souterrain de Modane (LSM - UMR 6417), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut Rayonnement Matière de Saclay (IRAMIS), EDELWEISS, Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])

Subjects
Nuclear and High Energy Physics, Particle physics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Dark Matter, bolometers, germanium detectors, Dark matter, Massive particle, FOS: Physical sciences, Elementary particle, Astrophysics::Cosmology and Extragalactic Astrophysics, EDELWEISS, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), WIMP, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Physics, 010308 nuclear & particles physics, Astrophysics::Instrumentation and Methods for Astrophysics, Fermion, Baryon, Weakly interacting massive particles, High Energy Physics::Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics
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 614 kg.d 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 WIMP-nucleon cross-section. For a WIMP mass of 90 GeV/c^2, where this analysis is most sensitive, a cross-section of 3.3 x 10^{-44} cm^2 is excluded at 90% CL. At higher WIMP masses, the combination improves the individual limits, by a factor 1.6 above 700 GeV/c^2. Alternative methods of combining the data provide stronger constraints for some ranges of WIMP masses and weaker constraints for others., Events, efficiencies, and main limit are available in text format (see README.txt)

Published
2011
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15. Dark Matter Search Results from the CDMS II Experiment

Author

S. Arrenberg, Enectali Figueroa-Feliciano, S. A. Hertel, R. Bunker, Jie Zhang, M. R. Dragowsky, W. Rau, P. L. Brink, R. Mahapatra, M. Pyle, David Moore, L. Hsu, David O. Caldwell, N. Mirabolfathi, A. Phipps, D. N. Seitz, X. Oiu, M. Kos, Sunil Golwala, Jeffrey P. Filippini, R. W. Ogburn, Bernard Sadoulet, Blas Cabrera, D. Balakishiyeva, F. DeJongh, D. S. Akerib, Z. Ahmed, L. Duong, Donald J. Holmgren, O. Kamaev, Martin E. Huber, P. Wikus, Jodi Cooley, T. Bruch, Miguel Daal, J. Hall, D. A. Bauer, E. J. Ramberg, R. W. Schnee, R. Hennings-Yeomans, Steven W. Leman, J. Yoo, Betty A. Young, P. Cushman, B. Serfass, M. Tarka, Kevin A. McCarthy, Darren Grant, A. Resetter, K. M. Sundqvist, Matthew Fritts, Vuk Mandic, Laura Baudis, C. N. Bailey, J. Sander, H. N. Nelson, M. Kiveni, Tarek Saab, S. Fallows, and S. J. Yellin

Subjects
Elastic scattering, Physics, Particle physics, Multidisciplinary, Large Underground Xenon experiment, 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, Signal region, Dark matter, Massive particle, Astrophysics::Instrumentation and Methods for Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Parameter space, 01 natural sciences, WIMP, 0103 physical sciences, High Energy Physics::Experiment, Cryogenic Dark Matter Search, 010306 general physics
Abstract

News from the Dark Side? Dark matter is thought to represent 85% of all matter in the universe and to have been responsible for the formation of structure in the early universe, but its nature is still a mystery. Ahmed et al. (p. 1619 , published online 11 February; see the Perspective by Lang ) describe the results from the completed Cryogenic Dark Matter Search (CDMS II) experiment, which searched for dark matter in the form of weakly interacting massive particles (WIMP). Two candidate signals were observed, whereas only one background event was expected. The probability of having two or more events from the background would have been 23%. The results of this analysis cannot be interpreted with confidence as evidence for WIMP interactions, but, at the same time, neither event can be ruled out as representing signal.

Published
2010

16. The Cryogenic Dark Matter Search (CDMS) experiment: Results, status and perspective

Author

R. Bunker, Blas Cabrera, Betty A. Young, R. W. Schnee, Steven W. Leman, K. M. Sundqvist, D. A. Bauer, D. Balakishiyeva, P. Cushman, J. Sanders, Z. Ahmed, Laura Baudis, D. O. Caldwell, S. A. Hertel, Bernard Sadoulet, O. Kamaev, M. Pyle, N. Mirabolfathi, Kevin A. McCarthy, Jodi Cooley, G. Wang, Darren Grant, Tarek Saab, J. Yoo, S. Arrenberg, W. Rau, R. Hennins‐Yeomans, David Moore, J. Beaty, X. Qiu, M. R. Dragowski, F. DeJongh, R. Mahapatra, Matthew Fritts, Enectali Figueroa-Feliciano, Sunil Golwala, Vuk Mandic, D. S. Akerib, C. N. Bailey, K. Clark, M. Kos, D. N. Seitz, H. N. Nelson, D. Homgren, M. Kiveni, S. J. Yellin, L. Hsu, J. Hall, Jeffrey P. Filippini, E. J. Ramberg, L. Duong, Martin E. Huber, P. L. Brink, A. Reisetter, R. W. Ogburn, T. Bruch, Bruno Serfass, Cabrera, B., Miller, A., and Young, B. A.

Subjects
Physics, Particle physics, Physics::Instrumentation and Detectors, Dark matter, Bolometer, Elementary particle, Cryogenics, Astrophysics::Cosmology and Extragalactic Astrophysics, Quasi particles, Particle detector, law.invention, Nuclear physics, law, Underground laboratory, High Energy Physics::Experiment, Cryogenic Dark Matter Search
Abstract

The Cryogenic Dark Matter Search experiment (CDMS) is using Phonon+Ionization detectors to search for Dark Matter in the form of Weakly Interactive Massive Particles (WIMPs). We report on new results from the operation of CDMS five “towers” at Soudan underground laboratory. With new and more massive detectors, SuperCDMS project has been started since March 2009. We report on the current status of SuperCDMS and its perspective.

Published
2009

17. Characterization of SuperCDMS 1-inch Ge Detectors

Author

R. Bunker, R. W. Schnee, Bernard Sadoulet, J. Sander, Matthew Fritts, S. J. Yellin, Vuk Mandic, Tarek Saab, Z. Ahmed, D. Homgren, P. L. Brink, M. Kos, A. Reisetter, Steven W. Leman, Kevin A. McCarthy, P. Cushman, David Moore, F. DeJongh, J. Yoo, L. Hsu, J. Hall, S. A. Hertel, H. N. Nelson, J. Beaty, Betty A. Young, W. Rau, Jeffrey P. Filippini, C. N. Bailey, D. A. Bauer, K. Clark, D. Balakishiyeva, K. M. Sundqvist, Sunil Golwala, N. Mirabolfathi, M. Kiveni, M. R. Dragowsky, G. Wang, Astrid Tomada, L. Duong, R. W. Ogburn, Martin E. Huber, D. S. Akerib, Blas Cabrera, E. J. Ramberg, X. Qiu, D. N. Seitz, D. O. Caldwell, Bruno Serfass, R. Mahapatra, Enectali Figueroa-Feliciano, O. Kamaev, M. Pyle, R. Hennings-Yeomans, Darren Grant, Jodi Cooley, Cabrera, Blas, Miller, Aaron, and Young, Betty

Subjects
Physics, business.industry, Bolometer, Dark matter, Detector, Particle detector, Particle identification, law.invention, Semiconductor detector, Nuclear physics, Optics, WIMP, law, Measuring instrument, business
Abstract

The newly commissioned SuperCDMS Soudan experiment aims to search for WIMP dark matter with a sensitivity to cross sections of 5×10^(−45)cm^2 and larger (90% CL upper limit). This goal is facilitated by a new set of germanium detectors, 2.5 times more massive than the ones used in the CDMS-II experiment, and with a different athermal phonon sensor layout that eliminates radial degeneracy in position reconstruction of high radius events. We present characterization data on these detectors, as well as improved techniques for correcting position-dependent variations in pulse shape across the detector. These improvements provide surface-event discrimination sufficient for a reach of 5×10^(−45)cm^2.

Published
2009

18. Bulk and Surface Charge Collection: CDMS Detector Performance and Design Implications

Author

E. J. Ramberg, M. Whilden, T. Bruch, Bruno Serfass, C. N. Bailey, K. Clark, J. Sander, P. L. Brink, D. A. Bauer, M. R. Dragowsky, J. Hall, D. Balakishiyeva, Betty A. Young, R. Bunker, D. N. Seitz, H. N. Nelson, Z. Ahmed, K. M. Sundqvist, Kevin A. McCarthy, M. Kos, L. Hsu, S. J. Yellin, F. DeJongh, Sunil Golwala, Jeffrey P. Filippini, R. Mahapatra, Matthew Fritts, Vuk Mandic, D. O. Caldwell, W. Rau, J. Beaty, L. Duong, J. Yoo, D. Homgren, Astrid Tomada, G. Wang, Martin E. Huber, A. Reisetter, Bernard Sadoulet, Blas Cabrera, D. S. Akerib, A. Hojem, David Moore, N. Mirabolfathi, M. Kiveni, R. W. Schnee, S. Arrenberg, R. W. Ogburn, Steven W. Leman, Tarek Saab, P. Cushman, Enectali Figueroa-Feliciano, O. Kamaev, M. Pyle, R. Hennings-Yeomans, Darren Grant, S. A. Hertel, Laura Baudis, X. Qiu, Jodi Cooley, Cabrera, B., Miller, A., and Young, B.

Subjects
Physics, Physics::Instrumentation and Detectors, Ionization, Weakly interacting massive particles, Detector, Cryogenic Dark Matter Search, Physics::Atomic Physics, Atomic physics, Particle detector, Particle identification, Semiconductor detector, Ion
Abstract

The Cryogenic Dark Matter Search (CDMS) searches for Weakly Interacting Massive Particles (WIMPs) with cryogenic germanium particle detectors. These detectors discriminate between nuclear‐recoil candidate and electron‐recoil background events by collecting both phonon and ionization energy from interactions in the crystal. Incomplete ionization collection results in the largest background in the CDMS detectors as this causes electron‐recoil background interactions to appear as false candidate events. Two primary causes of incomplete ionization collection are suface and bulk charge trapping. Recent work has been focused on reducing surface trapping through the modification of fabrication methods for future detectors. Analyzing data taken with test devices shows that hydrogen passivation of the amorphous silicon blocking layer does not reduce the effects of surface trapping. Other data shows that the iron‐ion implantation used to lower the critical temperature of the tungsten transition‐edge sensors increases surface trapping, causing a degradation of the ionization collection. Using selective implantation on future detectors may improve ionization collection for events near the phonon side detector surface. Bulk trapping is minimized by neutralizing ionized lattice impurities. Detector investigations at testing facilities and at the experimental site in Soudan, MN have provided methods to optimize the neutralization process and monitor running conditions to maintain maximal ionization collection.

Published
2009

19. Search for axions with the CDMS experiment

Author

R. Bunker, J. Hall, A. Reisetter, P. L. Brink, W. Rau, F. DeJongh, Donald J. Holmgren, D. Balakishiyeva, Bernard Sadoulet, M. Pyle, M. R. Dragowsky, L. Hsu, S. A. Hertel, J. Yoo, Jeffrey P. Filippini, David Moore, D. O. Caldwell, D. N. Seitz, S. Arrenberg, L. Duong, Martin E. Huber, Tarek Saab, X. Qiu, N. Mirabolfathi, R. W. Ogburn, Jodi Cooley, Sunil Golwala, E. J. Ramberg, J. Sander, Betty A. Young, D. S. Akerib, Z. Ahmed, R. Mahapatra, K. M. Sundqvist, M. Kos, H. N. Nelson, S. J. Yellin, Kevin A. McCarthy, C. N. Bailey, Enectali Figueroa-Feliciano, O. Kamaev, R. Hennings-Yeomans, Darren Grant, G. Wang, T. Bruch, Bruno Serfass, R. W. Schnee, Blas Cabrera, Steven W. Leman, P. Cushman, Laura Baudis, M. Kiveni, J. Beaty, Matthew Fritts, Vuk Mandic, D. A. Bauer, and M. Tarka

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, High Energy Physics::Phenomenology, FOS: Physical sciences, General Physics and Astronomy, Elementary particle, Fermion, 7. Clean energy, 01 natural sciences, Galaxy, High Energy Physics - Experiment, Massless particle, High Energy Physics - Experiment (hep-ex), High Energy Physics::Theory, 0103 physical sciences, High Energy Physics::Experiment, Cryogenic Dark Matter Search, 010306 general physics, Axion, Lepton
Abstract

We report on the first axion search results from the Cryogenic Dark Matter Search (CDMS) experiment at the Soudan Underground Laboratory. An energy threshold of 2 keV for electron-recoil events allows a search for possible solar axion conversion into photons or local Galactic axion conversion into electrons in the germanium crystal detectors. The solar axion search sets an upper limit on the Primakov coupling $g_{a\gamma\gamma}$ of 2.4$ \times 10^{-9}$ GeV$^{-1}$ at the 95% confidence level for an axion mass less than 0.1 keV/c$^2$. This limit benefits from the first precise measurement of the absolute crystal plane orientations in this type of experiment. The Galactic axion search analysis sets a world-leading experimental upper limit on the axio-electric coupling $g_{a\bar{e}e}$ of 1.4$ \times 10^{-12}$ at the 90 % confidence level for an axion mass of 2.5 keV/c$^2$. This analysis excludes an interpretation of the DAMA annual modulation result in terms of Galactic axion interactions for axion masses above 1.4 keV/c$^2$., Comment: 5 pages, 5 figures

Published
2009

20. SuperCDMS Detector Readout Cryogenic Hardware

Author

C. N. Bailey, K. Clark, J. Hall, N. Mirabolfathi, Laura Baudis, Tarek Saab, L. Hsu, H. N. Nelson, R. Bunker, Jeffrey P. Filippini, P. L. Brink, R. W. Schnee, S. A. Hertel, Steven W. Leman, P. Cushman, Sunil Golwala, L. Duong, J. Cooley, D. S. Akerib, L. Novak, D. Homgren, Martin E. Huber, X. Qiu, E. J. Ramberg, M. Kos, D. N. Seitz, P. Wikus, Bernard Sadoulet, D. Balakishiyeva, David Moore, Z. Ahmed, Enectali Figueroa-Feliciano, O. Kamaev, M. Pyle, S. J. Yellin, R. Hennings-Yeomans, Darren Grant, G. Wang, T. Bruch, Bruno Serfass, Astrid Tomada, Blas Cabrera, Betty A. Young, J. Beaty, K. M. Sundqvist, A. Reisetter, J. Sander, D. A. Bauer, Matthew Fritts, Vuk Mandic, R. W. Ogburn, J. Yoo, R. Mahapatra, M. Kiveni, S. Arrenberg, Kevin A. McCarthy, F. DeJongh, W. Rau, M. R. Dragowsky, D. O. Caldwell, Cabrera, B., Miller, A., and Young, B. A.

Subjects
Cryostat, Physics, Physics::Instrumentation and Detectors, business.industry, Amplifier, Detector, Bolometer, law.invention, High impedance, Thermal conductivity, Parasitic capacitance, law, Microphonics, Optoelectronics, business
Abstract

SuperCDMS employs 1‐inch thick germanium crystals operated below 50mK in a dilution cryostat. Each detector produces ionization and phonon signals. Ionization signals are amplified by JFETs operating at 150K within an assembly mounted on the 4K cryostat stage. These high impedance signals are carried to the FETs by superconducting “vacuum coaxes” which minimize thermal conductivity, stray capacitance, and microphonics. Transition edge sensors produce low‐impedance phonon signals, amplified by SQUID arrays mounted on a 600mK stage. Detectors are mounted in a six‐sided wiring configuration called a “tower”, which carries signals from 40mK to 4K. A flex circuit 3 meters in length carries amplified signals for each detector from 4K to a vacuum bulkhead. We describe the methods used to support the detectors, wiring and amplifier elements at various thermal stages, minimizing electrical noise and thermal loads.

Published
2009
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21. The Cryogenic Dark Matter Search (CDMS) : Present Status and Future

Author

P. L. Brink, Z. Ahmed, D. S. Akerib, C. N. Bailey, D. Balakishiyeva, D. A. Bauer, J. Beaty, R. Bunker, B. Cabrera, D. O. Caldwell, J. Cooley, E. do Couto e Silva, P. Cushman, F. DeJongh, M. R. Dragowsky, L. Duong, E. Figueroa-Feliciano, J. Filippini, M. Fritts, S. R. Golwala, D. R. Grant, J. Hall, R. Hennings-Yeomans, S. Hertel, A. Hojem, D. Holmgren, L. Hsu, M. E. Huber, O. Kamaev, M. Kos, M. Kiveni, S. W. Leman, R. Mahapatra, V. Mandic, K. A. McCarthy, D. Moore, N. Mirabolfathi, H. Nelson, L. Novak, R. W. Ogburn, M. Pyle, X. Qiu, E. Ramberg, W. Rau, A. Reisetter, T. Saab, B. Sadoulet, J. Sander, R. Schmitt, R. W. Schnee, D. N. Seitz, B. Serfass, K. M. Sundqvist, A. Tomada, G. Wang, P. Wikus, S. Yellin, J. Yoo, B. A. Young, Marvin L. Marshak, and Marshak, M. L.

Subjects
Physics, Particle physics, Upgrade, WIMP, Weakly interacting massive particles, Dark matter, Detector, Cryogenic Dark Matter Search
Abstract

The CDMS collaboration utilizes Ge detectors for their Weakly Interacting Massive Particle (WIMP) search at the Soudan mine, Minnesota. The final data run of CDMS II is complete and a detector upgrade for SuperCDMS has commenced. A SuperTower of five 1‐inch thick Ge crystals has been installed and undergoing commissioning. Its surface‐event rejection capability should allow SuperCDMS to continue to run background free for the next proposed phases: 15 kg Ge deployment at Soudan, and up to 150 kg Ge deployment at SNOLAB. Recent detector advances to allow a 1 tonne Ge experiment are also discussed.

Published
2009
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22. Results from the Super Cryogenic Dark Matter Search Experiment at Soudan.

Author

Agnese R, Aramaki T, Arnquist IJ, Baker W, Balakishiyeva D, Banik S, Barker D, Basu Thakur R, Bauer DA, Binder T, Bowles MA, Brink PL, Bunker R, Cabrera B, Caldwell DO, Calkins R, Cartaro C, Cerdeño DG, Chang Y, Chen Y, Cooley J, Cornell B, Cushman P, Daal M, Di Stefano PCF, Doughty T, Fascione E, Figueroa-Feliciano E, Fritts M, Gerbier G, Germond R, Ghaith M, Godfrey GL, Golwala SR, Hall J, Harris HR, Hong Z, Hoppe EW, Hsu L, Huber ME, Iyer V, Jardin D, Jastram A, Jena C, Kelsey MH, Kennedy A, Kubik A, Kurinsky NA, Loer B, Lopez Asamar E, Lukens P, MacDonell D, Mahapatra R, Mandic V, Mast N, Miller EH, Mirabolfathi N, Mohanty B, Morales Mendoza JD, Nelson J, Orrell JL, Oser SM, Page K, Page WA, Partridge R, Penalver Martinez M, Pepin M, Phipps A, Poudel S, Pyle M, Qiu H, Rau W, Redl P, Reisetter A, Reynolds T, Roberts A, Robinson AE, Rogers HE, Saab T, Sadoulet B, Sander J, Schneck K, Schnee RW, Scorza S, Senapati K, Serfass B, Speller D, Stein M, Street J, Tanaka HA, Toback D, Underwood R, Villano AN, von Krosigk B, Welliver B, Wilson JS, Wilson MJ, Wright DH, Yellin S, Yen JJ, Young BA, Zhang X, and Zhao X

Abstract

We report the result of a blinded search for weakly interacting massive particles (WIMPs) using the majority of the SuperCDMS Soudan data set. With an exposure of 1690 kg d, a single candidate event is observed, consistent with expected backgrounds. This analysis (combined with previous Ge results) sets an upper limit on the spin-independent WIMP-nucleon cross section of 1.4×10^{-44} (1.0×10^{-44})  cm^{2} at 46  GeV/c^{2}. These results set the strongest limits for WIMP-germanium-nucleus interactions for masses >12  GeV/c^{2}.

Published
2018
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23. New Results from the Search for Low-Mass Weakly Interacting Massive Particles with the CDMS Low Ionization Threshold Experiment.

Author

Agnese R, Anderson AJ, Aramaki T, Asai M, Baker W, Balakishiyeva D, Barker D, Basu Thakur R, 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 PC, 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, Lopez Asamar E, Lukens P, Mahapatra R, Mandic V, Mast N, Mirabolfathi N, Moffatt RA, Morales Mendoza JD, 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, and Zhang J

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}.

Published
2016
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24. First direct limits on lightly ionizing particles with electric charge less than e/6.

Author

Agnese R, Anderson AJ, 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, Chen Y, Cooley J, Cornell B, Crewdson CH, Cushman P, Daal M, Di Stefano PC, 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, Leder A, Loer B, Lopez Asamar E, Mahapatra R, Mandic V, Martinez C, McCarthy KA, Mirabolfathi N, Moffatt RA, Moore DC, Nelson H, Nelson RH, Ogburn RW, 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, Upadhyayula S, Villano AN, Welliver B, Wright DH, Yellin S, Yen JJ, Young BA, and Zhang J

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.

Published
2015
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25. Search for low-mass weakly interacting massive particles with SuperCDMS.

Author

Agnese R, Anderson AJ, Asai M, Balakishiyeva D, Basu Thakur R, 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 PC, Silva Edo C, 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, Lopez Asamar E, 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

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/c(2), 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)  cm(2) at 8  GeV/c(2). 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/c(2).

Published
2014
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26. Search for low-mass weakly interacting massive particles using voltage-assisted calorimetric ionization detection in the SuperCDMS experiment.

Author

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 PC, 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, and Zhang J

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.

Published
2014
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27. Silicon detector dark matter results from the final exposure of CDMS II.

Author

Agnese R, Ahmed Z, Anderson AJ, Arrenberg S, Balakishiyeva D, Basu Thakur R, Bauer DA, Billard J, Borgland A, Brandt D, Brink PL, Bruch T, Bunker R, Cabrera B, Caldwell DO, Cerdeno DG, Chagani H, Cooley J, Cornell B, Crewdson CH, Cushman P, Daal M, Dejongh F, do Couto e Silva E, Doughty T, Esteban L, Fallows S, Figueroa-Feliciano E, Filippini J, Fox J, Fritts M, Godfrey GL, Golwala SR, Hall J, Harris RH, Hertel SA, Hofer T, Holmgren D, Hsu L, Huber ME, Jastram A, Kamaev O, Kara B, Kelsey MH, Kennedy A, Kim P, Kiveni M, Koch K, Kos M, Leman SW, 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, Sundqvist KM, Villano AN, Welliver B, Wright DH, Yellin S, Yen JJ, Yoo J, Young BA, and Zhang J

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.

Published
2013
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28. 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

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., (© 2011 American Physical Society)

Published
2011
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29. 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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30. Search for axions with 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, Tarka M, Wang G, Yellin S, Yoo J, and Young BA

Abstract

We report on the first axion search results from the Cryogenic Dark Matter Search (CDMS) experiment at the Soudan Underground Laboratory. An energy threshold of 2 keV for electron-recoil events allows a search for possible solar axion conversion into photons or local galactic axion conversion into electrons in the germanium crystal detectors. The solar axion search sets an upper limit on the Primakov coupling g(agammagamma) of 2.4x10(-9) GeV-1 at the 95% confidence level for an axion mass less than 0.1 keV/c2. This limit benefits from the first precise measurement of the absolute crystal plane orientations in this type of experiment. The galactic axion search analysis sets a world-leading experimental upper limit on the axioelectric coupling g(aee) of 1.4x10(-12) at the 90% confidence level for an axion mass of 2.5 keV/c2.

Published
2009
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