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179 results on '"D. S. Akerib"'

151. A testing strategy for the mass production of CDMS II detectors

Author

David S. Abrams, Blas Cabrera, C. L. Chang, D. N. Seitz, M. C. Perillo Isaac, Bernard Sadoulet, P. Meunier, W. Rau, Betty A. Young, S. Kamat, D. Driscoll, R. J. Gaitskell, R. W. Schnee, D. A. Bauer, J. Hellmig, Vuk Mandic, Thushara Perera, Tarek Saab, M. B. Crisler, J. P. Castle, G. Wang, D. S. Akerib, and P. L. Brink

Subjects
Nuclear physics, Materials science, Ion implantation, chemistry, Silicon, Ionization, Detector, Dark matter, chemistry.chemical_element, Germanium, Cryogenic Dark Matter Search, Tungsten
Abstract

The Cryogenic Dark Matter Search (CDMS) employs detectors which are capable of simultaneously measuring the ionization and phonon energies deposited by a particle collision. These detectors are 1-cm-thick, 7-cm-diameter crystals of either germanium or silicon with a thin film of aluminum and tungsten patterned on the surface. This presentation discusses the testing regimen that a typical CDMS detector undergoes before it gets approval for final installation at the CDMS II deep side in Soudan, MN which should be coming online within a year. Now that our technology is relatively stable, the main focus of our test facilities is to provide quality control for the mass production of our detectors. First, the critical temperatures of the tungsten and other basic quantities are measured in preparation for iron implantation, which will bring the Tc down to the desired range (70 mK). The same basic measurements are taken again after implantation to assure that the correct Tc was achieved. Finally, a detailed map o...

Published
2002

152. Studies of radiation damage to CAMEX64 preamplifiers exposed to γ-rays at the Cornell high energy synchrotron source

Author

C. Qiao, C. Bebek, N. Katayama, D. S. Akerib, C. M. Korte, Z. Sobolewski, H. N. Nelson, D. Sperka, P. C. Kim, S. Henderson, D. Cinabro, J. S. Katris, Marina Artuso, K. Honscheid, T. E. Browder, J. Gronberg, M. Chadha, F. Würthwein, H. Worden, R. Balest, H. Yamamoto, John Dobbins, C. D. Jones, D. F. Cowen, T. K. Nelson, J. S. Miller, H. Tajima, J. P. Alexander, S. Chan, D.M. Schmidt, R. J. Morrison, Mats A Selen, S. G. Gray, and J. G. Smith

Subjects
Physics, Nuclear and High Energy Physics, Photon, Physics::Instrumentation and Detectors, business.industry, Preamplifier, Synchrotron, Charged particle, law.invention, Nuclear physics, Optics, law, Radiation damage, High Energy Physics::Experiment, Irradiation, Monochromatic color, business, Instrumentation, Noise (radio)
Abstract

CAMEX64 preamplifiers, developed at the MPI-Munich for use in the readout of silicon strip detectors, have been exposed to well-measured doses of monochromatic γ-rays from the Cornell high energy synchrotron source (CHESS) and measurements of the resulting radiation damage have been made. Silicon strip detectors with their associated CAMEXes will be installed close to the interaction region in the CLEO-II experiment at Cornell University, where they will be exposed to both charged particle and photon fluences. Powered and unpowered CAMEXes were irradiated and after each exposure measurements of pedestals, gains, coherent and incoherent noise were made, until the devices could no longer be read out. Results are quoted for noise and gain degradation as a function of dose.

Published
1993

153. LIMITS ON THE WIMP-NUCLEON CROSS-SECTION FROM THE CRYOGENIC DARK MATTER SEARCH

Author

Tarek Saab, Andrew Sonnenschein, A. Lu, B. Neuhauser, Boris Pritychenko, H. N. Nelson, A. K. Davies, Bernard Sadoulet, Scott C. White, Sunil Golwala, A. L. Spadafora, D. O. Caldwell, P. Shestople, A. Da Silva, J. Emes, E. E. Haller, J. P. Castle, Ronald R. Ross, Patrick D. Barnes, T. A. Shutt, D. S. Akerib, A. C. Cummings, Daniel E. Hale, R. Bunker, G. Smith, Thushara Perera, P. Colling, Vuk Mandic, R. L. Dixon, B. L. Dougherty, S. J. Yellin, P. Meunier, Donald J. Holmgren, P. L. Brink, D. Driscoll, R. J. Gaitskell, R. W. Schnee, S. Eichblatt, Martin E. Huber, R. Abusaidi, John M. Martinis, J. D. Taylor, W. Stockwell, Betty A. Young, M. B. Crisler, A. R. Smith, J. Hellmig, Sae Woo Nam, F. P. Lipschultz, Kent D. Irwin, Alexander Bolozdynya, J. Sander, C. Maloney, D. N. Seitz, M. C. Perillo Isaac, J. Jochum, R. M. Clarke, Blas Cabrera, M. J. Penn, D. A. Bauer, and C. L. Chang

Subjects
Dark matter halo, Physics, Particle physics, WIMP, Baryonic dark matter, Hot dark matter, Scalar field dark matter, Cryogenic Dark Matter Search, Light dark matter, Dark fluid
Published
2001

154. Recent Results from the Cryogenic Dark Matter Search for Weakly Interacting Massive Particles

Author

J. D. Taylor, F. P. Lipschultz, S. Eichblatt, M. J. Penn, M. B. Crisler, A. R. Smith, P. Shestople, R. Bunker, Sunil Golwala, Betty A. Young, Thushara Perera, B. Pritychenko, S. J. Yellin, D. O. Caldwell, R. L. Dixon, John M. Martinis, A. Lu, A. Da Silva, Tarek Saab, M. E. Huber, D. S. Akerib, Alexander Bolozdynya, D. N. Seitz, Daniel E. Hale, R. Abusaidi, Kent D. Irwin, M. C. Perillo Isaac, J. Emes, Blas Cabrera, A. H. Sonnenschein, Simon D. M. White, A. Cummings, P. D. Barnes, P. L. Brink, J. Jochum, R. R. Ross, Bernard Sadoulet, R. M. Clarke, T. A. Shutt, A. L. Spadafora, V. Mandic, D. A. Bauer, W. Stockwell, J. P. Castle, Sae Woo Nam, R. J. Gaitskell, B. L. Dougherty, G. W. Smith, H. N. Nelson, J. Hellmig, R. W. Schnee, B. Neuhauser, D. D. Driscoll, P. Colling, A. K. Davies, and E. E. Haller

Subjects
Physics, Particle physics, WIMP, Weakly interacting massive particles, Hot dark matter, Dark matter, Warm dark matter, Strongly interacting massive particle, Cryogenic Dark Matter Search, Light dark matter
Abstract

In September 1999, the Cryogenic Dark Matter Search (CDMS) completed a nine month run with the first generation detectors (0.5 kg of germanium BLIPs sensing thermal phonons and ionization). The data acquired in this run significantly decrease the upper limits on WIMP interaction in germanium by a factor 2.5 to 10 depending on the mass region and begin to probe supersymmetry. The results are however strongly inconsistent with the claims of the DAMA experiment.

Published
2001

155. Results of the Cryogenic Dark Matter Search

Author

R. M. Clarke, D. A. Bauer, M. B. Crisler, E. E. Haller, R. Bunker, P. D. BarnesJr., P. Shestople, P. L. Brink, R. L. Dixon, A. L. Spadafora, Boris Pritychenko, Blas Cabrera, G. Smith, R. W. Schnee, D. D. Driscoll, A. Lu, A. K. Davies, A. Da Silva, Vuk Mandic, B. L. Dougherty, J. P. Castle, Kent D. Irwin, R. R. Ross, Simon D. M. White, Martin E. Huber, A. C. Cummings, T. A. Shutt, H. N. Nelson, Bernard Sadoulet, J. Emes, A. H. Sonnenschein, B. Neuhauser, M. C. Perillo Isaac, P. Colling, D. O. Caldwell, A. R. Smith, W. Stockwell, Betty A. Young, J. Hellmig, John M. Martinis, R. J. Gaitskell, Alexander Bolozdynya, Thushara Perera, S. J. Yellin, J. Jochum, Tarek Saab, D. N. Seitz, Sae Woo Nam, Sunil Golwala, D. S. Akerib, Daniel E. Hale, R. Abusaidi, J. D. Taylor, F. P. Lipschultz, M. J. Penn, and S. Eichblatt

Subjects
Physics, Physics::Instrumentation and Detectors, Dark matter, Astrophysics::Instrumentation and Methods for Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Parameter space, Nuclear physics, Cross section (physics), WIMP, Weakly interacting massive particles, Mixed dark matter, High Energy Physics::Experiment, Neutron, Cryogenic Dark Matter Search
Abstract

The Cryogenic Dark Matter Search (CDMS) employs Ge and Si detectors to search for weakly interacting massive particles (WIMPs) via their elastic-scattering interactions with nuclei while discriminating against interactions of background particles. CDMS data, accounting for the neutron background, give limits on the spin-independent WIMP-nucleon elastic-scattering cross section that exclude unexplored parameter space above 10 GeV c-2 WIMP mass and. at > 75% CL. the entire 3σ allowed region for the WIMP signal reported by the DAMA experiment.

Published
2001

156. Exclusion Limits on the WIMP-Nucleon Cross-Section from the Cryogenic Dark Matter Search

Author

M. B. Crisler, H. N. Nelson, R. Bunker, S. Eichblatt, J. Emes, T. A. Shutt, E. E. Haller, P. L. Brink, Alexander Bolozdynya, Josef Jochum, B. L. Dougherty, R. L. Dixon, Ronald R. Ross, G. Smith, M. J. Penn, Stephen H. White, R. W. Schnee, J. Hellmig, A. Da Silva, Bernard Sadoulet, J. P. Castle, Andrew Sonnenschein, A. C. Cummings, F. P. Lipschultz, A. Lu, John M. Martinis, B. Neuhauser, Kent D. Irwin, Peter D. Barnes, A. L. Spadafora, J. D. Taylor, P. Shestople, R. Abusaidi, W. Stockwell, Betty A. Young, Boris Pritychenko, R. M. Clarke, P. Colling, Vuk Mandic, Blas Cabrera, Sunil Golwala, A. K. Davies, D. Driscoll, R. J. Gaitskell, D. N. Seitz, D. S. Akerib, Daniel E. Hale, Sae Woo Nam, D. A. Bauer, M. C. Perillo Isaac, D. O. Caldwell, Tarek Saab, Thushara Perera, S. J. Yellin, Martin E. Huber, and A. R. Smith

Subjects
Nuclear and High Energy Physics, Particle physics, Physics::Instrumentation and Detectors, Dark matter, General Physics and Astronomy, FOS: Physical sciences, Elementary particle, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), WIMP, 0103 physical sciences, Neutron, 010306 general physics, Light dark matter, Elastic scattering, Physics, 010308 nuclear & particles physics, Astrophysics (astro-ph), Astrophysics::Instrumentation and Methods for Astrophysics, Baryon, Weakly interacting massive particles, High Energy Physics::Experiment, Halo, Cryogenic Dark Matter Search, Nucleon, Caltech Library Services
Abstract

The Cryogenic Dark Matter Search (CDMS) employs low-temperature Ge and Si detectors to search for Weakly Interacting Massive Particles (WIMPs) via their elastic-scattering interactions with nuclei while discriminating against interactions of background particles. For recoil energies above 10 keV, events due to background photons are rejected with >99.9% efficiency, and surface events are rejected with >95% efficiency. The estimate of the background due to neutrons is based primarily on the observation of multiple-scatter events that should all be neutrons. Data selection is determined primarily by examining calibration data and vetoed events. Resulting efficiencies should be accurate to about 10%. Results of CDMS data from 1998 and 1999 with a relaxed fiducial-volume cut (resulting in 15.8 kg-days exposure on Ge) are consistent with an earlier analysis with a more restrictive fiducial-volume cut. Twenty-three WIMP candidate events are observed, but these events are consistent with a background from neutrons in all ways tested. Resulting limits on the spin-independent WIMP-nucleon elastic-scattering cross-section exclude unexplored parameter space for WIMPs with masses between 10-70 GeV c^{-2}. These limits border, but do not exclude, parameter space allowed by supersymmetry models and accelerator constraints. Results are compatible with some regions reported as allowed at 3-sigma by the annual-modulation measurement of the DAMA collaboration. However, under the assumptions of standard WIMP interactions and a standard halo, the results are incompatible with the DAMA most likely value at >99.9% CL, and are incompatible with the model-independent annual-modulation signal of DAMA at 99.99% CL in the asymptotic limit., 40 pages, 49 figures (4 in color), submitted to Phys. Rev. D; v.2:clarified conclusions, added content and references based on referee's and readers' comments; v.3: clarified introductory sections, added figure based on referee's comments

Published
2000
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157. Upper limit on the decayK+→e+νμ+μ−

Author

T. Numao, A. S. Turcot, J. A. Macdonald, S. S. Adler, Ewart W. Blackmore, P. D. Meyers, Y. Kuno, J. Roy, T. Nakano, L. Felawka, A. Sambamurti, F. C. Shoemaker, Mats A Selen, M. S. Atiya, Daniel Robert Marlow, J. S. Haggerty, J. S. Frank, M. Rozon, A. Stevens, J. M. Poutissou, A. Konaka, M. M. Ito, R. Soluk, L. S. Littenberg, I. H. Chiang, D. S. Akerib, P. Padley, C. Witzig, R. Poutissou, A. J.S. Smith, W. C. Louis, Robert McPherson, P. Kitching, M. E. Convery, K. K. Li, T. F. Kycia, Douglas Bryman, R. C. Strand, and M. Ardebili

Subjects
Physics, Nuclear and High Energy Physics, Chiral symmetry, Chiral perturbation theory, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Limit (mathematics), Atomic physics, Perturbation theory, Helicity, Standard Model
Abstract

An upper limit on the branching ratio for the decay K{sup +}{r_arrow}e{sup +}{nu}{mu}{sup +}{mu}{sup {minus}} is set at 5.0{times}10{sup {minus}7} at a 90{percent} confidence level, consistent with predictions from chiral perturbation theory. {copyright} {ital 1998} {ital The American Physical Society}

Published
1998

158. The Cryogenic Dark Matter Search (CDMS)

Author

R. R. Ross, Thushara Perera, J. D. Taylor, S. J. Yellin, P. D. Barnes, M. J. Penn, A. R. Smith, Betty A. Young, P. L. Brink, David O. Caldwell, A. Sonnenschein, R. Therrien, William B. Knowlton, Simon D. M. White, B. L. Dougherty, Sae Woo Nam, Bernard Sadoulet, D. A. Bauer, D. Hale, E. E. Haller, A. DaSilva, Kent D. Irwin, D. N. Seitz, J. Emes, G. W. Smith, W. Stockwell, R. M. Clarke, R. J. Gaitskell, Blas Cabrera, Sunil Golwala, D. S. Akerib, B. Chugg, T. A. Shutt, A. K. Davies, and R. W. Schnee

Subjects
Galactic halo, Physics, Scattering, Weakly interacting massive particles, Dark matter, Astrophysics::Cosmology and Extragalactic Astrophysics, Halo, Supersymmetry, Cryogenic Dark Matter Search, Astrophysics, Nucleon, Astrophysics::Galaxy Astrophysics
Abstract

Despite the discovery of MACHO dark matter in our galactic halo, much of the inferred halo mass seems still to be missing [1]. If we assume that this missing mass is in the form of the weakly interacting massive particles (WIMPs) predicted by supersymmetry [2], then we expect to find a flux of 107/mx cm-2 in the solar neighborhood or 104-106 cm-2 assuming the most likely mass range mx ∽ 10 - 1000 GeV and standard models of the galactic halo. These WIMPs have a total cross section for scattering on a nucleon of no more than 10-41cm2, leading to total scattering rates below 0.1 kg-1 day-1 of target mass.

Published
1997

159. Low Radioactivity Cryostat System for a 20mK Particle Detector

Author

R. Wolgast, Ronald R. Ross, P. A. Luft, Peter D. Barnes, Simon D. M. White, Bernard Sadoulet, R. V. Schafer, J. D. Taylor, and D. S. Akerib

Subjects
Physics, Cryostat, Physics::Instrumentation and Detectors, Gasket, Nuclear engineering, Electron beam welding, Detector, Dilution refrigerator, Flange, Thermal conduction, Particle detector
Abstract

A system for cooling detectors used in particle astrophysics is described. The volume accommodating particle detectors is 30 cm diameter by 30 cm high and attained a temperature of 8.5 +/- 0.5 mK. The need for low radioactive backgrounds has driven design, selection of materials and assembly techniques. Unusual features include a detector package cooled by conduction by tubes ~1m in length connected to the port of a commercial side access dilution refrigerator, swinging support system for detectors and heat shields, fabrication using electron beam welding, assembly techniques for thermally conducting bolted joints, flexible thermal conduction paths, and copper flange on copper gasket vacuum seals at LHe temperature. A first cool down of the system resulted in temperature distributions and thermal loads consistent with thermal modeling.

Published
1996

160. Cryogenic Large Liquid Xenon Detector for Dark Matter Searches

Author

A. Rodionov, J. A. Nokkel, P. Roberts, M. Ihm, R. G. Jacobsen, M. Wlasenko, E. Dahl, M. R. Dragowsky, Alexander Bolozdynya, A. Lyashenko, K. T. Lesko, M. Pangilinan, C. Lee, R. L. Mannino, W. Skulski, C. Camp, S. Fiorucci, X. Bai, D. Carr, Dongming Mei, T.M. Stiegler, M. Hanhardt, S. Bedikian, T. Classen, J. Mock, Daniel McKinsey, Robert Svoboda, Steven Dazeley, R. C. Webb, L. de Viveiros, P. Phelps, B. Holbrook, F. L. H. Wolfs, A. Curioni, M. Sweany, David Leonard, M. Woods, H. N. Nelson, C. Sofka, E. Druszkiewicz, Sidney Cahn, C. R. Hall, D. S. Akerib, L. Kastens, J.J. Chapman, Mani Tripathi, R. J. Gaitskell, J. Thomson, J. T. White, J. Spaans, Chao Zhang, M. C. Carmona-Benitez, P. Sorensen, R. L. Lander, K. Clark, M. Morii, T. A. Shutt, E. Bernard, J.R. Verbus, C.H. Faham, T. Coffey, Z. Marquez, A. W. Bradley, Kareem Kazkaz, N. Walsh, K.R. Gibson, and D.C. Malling

Subjects
Physics, History, Large Underground Xenon experiment, Physics::Instrumentation and Detectors, media_common.quotation_subject, Dark matter, Astrophysics::Instrumentation and Methods for Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Particle detector, Universe, Computer Science Applications, Education, Weakly interacting massive particles, Cryogenic Dark Matter Search, Light dark matter, ArDM, media_common
Abstract

Observation of rotational curve of spiral galaxies shows that a large fraction (~23%) of the mass density of the universe is unaccounted for. Such a significant percentage of missing dark matter suggests that the universe may consist of new types of elementary particles. A compelling explanation for the new particles is the existence of Weakly Interacting Massive Particles (WIMPs), which are non-baryonic particles characterized by particle physics theories beyond the Standard Model. WIMPs are believed to only interact through the weak force and gravity; hence the interaction cross section with ordinary matter is extremely small. Therefore, experimental techniques that combine low radioactivity, low energy thresholds, efficient discrimination against electronic recoil backgrounds, and scalability to large detector masses can only be performed at a deep underground environment where the interference of cosmic rays is obviated. In this paper, we report a cryogenic large liquid xenon detector for dark matter searches at Sanford Lab (Davis Cavern) in the Homestake Mine, USA. The goal of the large underground xenon (LUX) dual-phase detector is to clearly detect (or exclude) WIMPs with a spin independent cross-section per nucleon of 7 × 10−46 cm2, equivalent to ~0.5 events/100 kg/month in an inner 100 kg fiducial volume (FV) of a 300 kg LXe detector.

Published
2012

161. Present status of the Cryogenic Dark Matter Search (CDMS II) experiment

Author

J. P. Castle, J. Hellmig, Laura Baudis, R. Bunker, A. Lu, John M. Martinis, D. O. Caldwell, W. Rau, D. A. Bauer, R. Dixon, Tarek Saab, J. Emes, R. J. Gaitskell, P. Meunier, S. Kamat, G. Wang, T. A. Shutt, Vuk Mandic, P. L. Brink, J. Sander, R. W. Schnee, D. D. Driscoll, M.B. Crisler, D. Holmgren, Martin E. Huber, Alan R. Smith, H. N. Nelson, Blas Cabrera, D. S. Akerib, G. Smith, David S. Abrams, D. N. Seitz, A. L. Spadafora, R. R. Ross, Betty A. Young, Bernard Sadoulet, Thushara Perera, S. J. Yellin, M. S. Armel-Funkhouser, M. C. Perillo Isaac, and C. Chang

Subjects
Physics, Particle physics, media_common.quotation_subject, Dark matter, Condensed Matter Physics, Particle detector, Particle identification, Universe, Electronic, Optical and Magnetic Materials, Semiconductor detector, Nuclear physics, WIMP, Weakly interacting massive particles, Cryogenic Dark Matter Search, Electrical and Electronic Engineering, media_common
Abstract

The CDMS experiment utilizes Ge and Si detectors operating at 20 mK to search for the Dark Matter of the Universe hypothesized to exist in the form of weakly interacting massive particles (WIMPs). In early 2000, CDMS set the most competitive exclusion limit for scalar-interaction WIMPs in the Stanford Underground Facility (SUF). A new search (CDMS II) is now commencing with several improvements: a deep-site facility in the Soudan mine, Minnesota; and the detector technology has been further improved to aid in the rejection of surface-electron (β) events. A new generation of detectors, sensitive to the initial athermal phonon flux from a particle event, have been in operation for the past year at Stanford's shallow site and are ready for installation at the deep site.

Published
2003

162. Cryogenic germanium detectors for a weakly interactive massive particle (WIMP) dark-matter search

Author

Angela J. Da Silva, T. A. Shutt, W. Stockwell, Betty A. Young, Simon D. M. White, Eugene E. Haller, Bernard Sadoulet, G. Smith, J. Emes, J. D. Taylor, Ronald R. Ross, Boris Pritychenko, E. Aubourg, Sunil Golwala, D. S. Akerib, S. Margulies, A. C. Cummings, and Peter D. Barnes

Subjects
Physics, Particle physics, Physics::Instrumentation and Detectors, Dark matter, Massive particle, chemistry.chemical_element, Germanium, Electron, Nuclear physics, WIMP, chemistry, Ionization, Weakly interacting massive particles, High Energy Physics::Experiment, Neutron, Physics::Atomic Physics, Nuclear Experiment
Abstract

We are preparing an experimental search for weakly interacting massive particle (WIMP) dark matter using cryogenic germanium detectors. These detectors measure both the ionization and phonons produced by particle interactions in the substrate. The ionization measurement uses low drift fields, approximately equals 1 V/cm. The phonon measurement is made using neutron transmutation doped (NTD) germanium thermistors. Simultaneous detection of phonons and ionization allows us to discriminate between electron-recoil and nuclear-recoil events which gives a powerful method for isolating possible WIMP events (nuclear recoils) from background gamma ray events (electron recoils). Recent work on our understanding and optimization of these detectors will be presented.

Published
1994

163. Search for B0 decays to two charged leptons

Author

J. Mevissen, J. Kandaswamy, B. Geiser, J. J. Thaler, H. P. Paar, R. Fulton, C. D. Jones, M. S. Alam, B. Nemati, M. Lohner, F. Morrow, M. Sapper, G. C. Moneti, Sheldon Stone, Paul Avery, J. Ernst, D. Peterson, M. Procario, E. I. Shibata, B. Ong, Y. Kwon, Ian Shipsey, D. He, R. Kennett, H. Tajima, J. Fast, D. Z. Besson, E. R.F. Hyatt, M. Lattery, D. Payne, H. A. Cho, S. Salman, Michael Wood, D. Perticone, R. Davis, R. Ammar, B. Gittelman, Jungil Lee, E. Nordberg, Jeffrey Richman, Christopher G. White, V. Savinov, M. Goldberg, Anders Ryd, M. Athanas, M. Daoudi, D. L. Kreinick, N. Kwak, George D Gollin, T. E. Browder, H. Severini, S. Chan, K. K. Gan, Y. Skovpen, I. J. Kim, D. Fujino, J. J. O'Neill, D. L. Hartill, D. F. Cowen, K. Cho, G. S. Ludwig, K. Lingel, H. Yamamoto, C. O'Grady, N. Copty, N. B. Mistry, C. R. Ng, S. Menary, Dave Britton, K. W. Edwards, S. Roberts, Yoram Rozen, Z. Egyed, F. Würthwein, F. Butler, R. L. McIlwain, M. Battle, Yurii V. Mukhin, V. Shelkov, S. Schrenk, Maurice Garcia-Sciveres, Michael S. Witherell, D. Sperka, M. L. Kelly, T. Liu, P. Zadorozhny, F. Muheim, Ruifang Wang, S. W. Gray, I. Volobouev, T. Bergfeld, R. Malchow, C. Bebek, C. M. Daubenmier, P. Skubic, John Yelton, P. S. Drell, M. Lambrecht, M. Modesitt, D. G. Cassel, G. Masek, Philip Baringer, Juliet Ritchie Patterson, J. Masui, D. Cinabro, D. B. MacFarlane, A. P. Freyberger, D. N. Brown, George R. Kalbfleisch, Jorge Luis Rodriguez, M. Saulnier, S. Playfer, M.A. Palmer, Pu Wang, S. Ball, C. R. Sun, Ryszard Stroynowski, J. G. Smith, Karl Berkelman, W. T. Ford, A. J. Weinstein, Ron Poling, Daniel Schmidt, S. Patton, R. D. Kass, R. Balest, P. L. Wang, W. R. Ross, K. Honscheid, H. N. Nelson, J. Snow, Marina Artuso, P. Rankin, J. S. Miller, Vivek Jain, B. I. Eisenstein, J. Gronberg, M. Thulasidas, D. Acosta, J. K. Nelson, S. Yang, N. Horwitz, M. Chadha, R. Mountain, Chunjie Wang, Daniel Johnson, Ha Lam, G. Wei, R. Ehrlich, G. Crawford, S. L. Jones, G. Vasseur, M. M. Zoeller, H. Kagan, J. Dominick, B. C. Barish, R. J. Morrison, Mats A Selen, D. M. Coffman, B. K. Heltsley, A. J. Sadoff, T. Miao, Kenneth Bloom, N. Katayama, D. S. Akerib, G. Eigen, Alice Bean, R. Kutschke, S. Sanghera, N. Hancock, S. Nakanishi, E. H. Thorndike, D. Coppage, J. P. Alexander, M. Ogg, T. K. Nelson, J. Urheim, T. Skwarnicki, P. C. Kim, S. Henderson, G. Zhu, Richard Wilson, D. Riley, J. Bartelt, Yuichi Kubota, P. M. Patel, M. Sung, D. H. Miller, X. Fu, R. Stephens, S. E. Csorna, and K. Kinoshita

Subjects
Combinatorics, Physics, Particle physics, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, MathematicsofComputing_DISCRETEMATHEMATICS
Abstract

We have searched for [ital B][sup 0] decays to two charged leptons and set 90% confidence level upper limits on the branching fractions: [ital B]([ital B][sup 0][r arrow][ital e][sup +][ital e][sup [minus]])[lt]5.9[times]10[sup [minus]6], [ital B]([ital B][sup 0][r arrow][mu][sup +][mu][sup [minus]])[lt]5.9[times]10[sup [minus]6], [ital B]([ital B][sup 0][r arrow][ital e][sup [plus minus]][mu][sup [minus plus]]) [lt]5.9[times]10[sup [minus]6], [ital B]([ital B][sup 0][r arrow][ital e][sup [plus minus]][tau][sup [minus plus]])[lt]5.3[times]10[sup [minus]4], and [ital B]([ital B][sup 0][r arrow][mu][sup [plus minus]][tau][sup [minus plus]])[lt]8.3[times]10[sup [minus]4].

Published
1994

164. Observation of a new charmed strange meson

Author

B. Geiser, M. Lohner, J. J. O'Neill, D. Cinabro, R. Kennett, B. Gittelman, I. J. Kim, P. S. Drell, M. Saulnier, Y. I. Skovpen, B. Ong, Ian Shipsey, J. J. Thaler, N. Hancock, D. R. Johnson, T. K. Nelson, David Sperka, D. F. Cowen, John E. Bartelt, G.R. Kalbfleisch, S. Nakanishi, G. Wei, D. Z. Besson, G. Vasseur, J. Gronberg, H. P. Paar, Cong Wang, R. Fulton, R. L. Malchow, Christopher G. White, J. L. Rodriguez, T. Liu, M. Modesitt, Frank Würthwein, Z. Egyed, M. Garcia-Sciveres, Igor Volobouev, M. M. Zoeller, K. Cho, A. P. Freyberger, M. Daoudi, R. J. Wilson, Vipul Jain, C. Qiao, M. Sapper, N. B. Mistry, H. Tajima, C. R. Sun, John Yelton, P. Zadorozhny, W. T. Ford, P. Skubic, N. Kwak, R. D. Kass, M. Kelly, Ryszard Stroynowski, D. Fujino, R. F. Hyatt, S. Schrenk, R. Balest, Ha Lam, E. H. Thorndike, J. Mevissen, J. D. Richman, P. Rankin, E. Nordberg, T. Bergfeld, J. Kandaswamy, F. Morrow, D. G. Cassel, G. S. Ludwig, Y. J. Kwon, D. Coppage, J. A. Ernst, R. Ehrlich, K. Lingel, J. P. Alexander, Dave Britton, R. L. McIlwain, M. Lattery, Harris Kagan, D. Peterson, S. Playfer, J. Snow, Shawn W. Henderson, S. L. Jones, C. P. O'Grady, Sheldon Stone, J. Masui, Paul Avery, T. Miao, X. Fu, R. Poling, J. Urheim, Yurii V. Mukhin, W. R. Ross, P. L. Wang, R. J. Morrison, M. S. Alam, Mats A Selen, A. J. Sadoff, J. S. Miller, S. J. Patton, B. Nemati, M. Thulasidas, D. B. MacFarlane, D. L. Hartill, M. Ogg, G. Zhu, Daniel Schmidt, H. N. Nelson, M. Battle, K. Honscheid, S. Roberts, B. I. Eisenstein, A. J.R. Weinstein, Marina Artuso, H. A. Cho, N. Copty, D. He, Barry C. Barish, E. I. Shibata, K. K. Gan, T. Skwarnicki, Yoram Rozen, Glen D. Crawford, P. C. Kim, Philip Baringer, S. Ball, M. Goldberg, G. C. Moneti, K. W. Edwards, C. R. Ng, D. L. Kreinick, C. Bebek, S. Sanghera, Pu Wang, T. E. Browder, Darin Acosta, Jungil Lee, H. Yamamoto, J. G. Smith, C. M. Daubenmier, Anders Ryd, M. Athanas, Michael S. Witherell, M.K. Sung, R. Wang, D. J. Payne, M.A. Palmer, V.G. Shelkov, S. W. Gray, D. Perticone, M. Lambrecht, D. N. Brown, S. Salman, Janice Nelson, C. D. Jones, Michael Wood, G. Masek, Juliet Ritchie Patterson, M. Procario, R. Mountain, Horst Severini, R. Davis, N. Horwitz, M. Chadha, George D Gollin, James E. Fast, Robert K. Kutschke, Karl Berkelman, R. Stephens, S. E. Csorna, F. Butler, K. Kinoshita, D. H. Miller, S. Menary, F. Muheim, R. Ammar, S. Chan, J. Dominick, V. Savinov, D. Riley, D. M. Coffman, B. K. Heltsley, Yuichi Kubota, P. M. Patel, Kenneth Bloom, N. Katayama, D. S. Akerib, G. Eigen, and Alice Bean

Subjects
Physics, Particle physics, Particle properties, Meson, Hadron, General Physics and Astronomy, FOS: Physical sciences, Elementary particle, Particle identification, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Boson
Abstract

Using the CLEO-II detector, we have obtained evidence for a new meson decaying to $D^0 K^+$. Its mass is $2573.2^{+1.7}_{-1.6}\pm 0.8\pm 0.5$ {}~MeV/$c^2$ and its width is $16^{+5}_{-4}\pm 3$~MeV/$c^2$. Although we do not establish its spin and parity, the new meson is consistent with predictions for an $L=1$, $S=1$, $J_P=2^+$ charmed strange state., 9 pages uuencoded compressed postscript (process with uudecode then gunzip). hardcopies with figures can be obtained by sending mail to: preprints@lns62.lns.cornell.edu

Published
1994

165. Search for exclusive b--u semileptonic decays of B mesons

Author

J. Whitmore, Jungil Lee, M. Kelly, D. Riley, D. L. Kreinick, C. Bebek, K. Honscheid, B. Geiser, J. Mevissen, J. Kandaswamy, D. G. Cassel, John E. Bartelt, G.R. Kalbfleisch, T. E. Browder, David Sperka, Sheldon Stone, Paul Avery, J. A. Ernst, J. Dominick, Alice Bean, D. L. Hartill, R. Poling, V. Savinov, D. Peterson, M. Lohner, J. J. O'Neill, Robert Wilson, R. L. Malchow, Christopher G. White, N. Hancock, C. R. Sun, W. T. Ford, R. D. Kass, Daniela Bortoletto, Daniel Schmidt, Y. Skovpen, F. Muheim, Paul Sheldon, Yuichi Kubota, C. O'Grady, Z. Egyed, S. W. Gray, E. H. Thorndike, Barry C. Barish, Ha Lam, E. I. Shibata, P. S. Drell, W. R. Ross, D. Perticone, J. D. Richman, R. Ballest, R. Davis, M. Sapper, K. Sparks, M. Lambrecht, D. Coppage, J. P. Alexander, D. N. Brown, M. Saulnier, P. Wilson, D. Z. Besson, S. J. Patton, Shawn W. Henderson, R. Ammar, M. Lattery, H. N. Nelson, Janice Nelson, C. D. Jones, D. Cinabro, R. Kennett, Michael Wood, R. S. Galik, M. Daoudi, N. Copty, S. Schrenk, S. Chan, B. Gittelman, B. Ong, H. Yamamoto, S. Roberts, Yoram Rozen, X. Fu, Shengfeng Yang, S. Sanghera, Pu Wang, Darin Acosta, I. J. Kim, R. Wang, D. M. Coffman, J. G. Smith, J. L. Rodriguez, Frank Würthwein, B. K. Heltsley, V. Romero, Philip Baringer, K. Lingel, M. Sivertz, D. H. Miller, N. B. Mistry, S. Ball, Marina Artuso, Glen D. Crawford, S. Menary, D. F. Cowen, J. Masui, T. Miao, Ian Shipsey, H. Worden, P. L. Wang, J. S. Miller, J. Gronberg, H. P. Paar, R. Fulton, R. Stephens, S. E. Csorna, M. Garcia-Sciveres, Cong Wang, M. Thulasidas, F. Butler, P. Skubic, K. Kinoshita, E. Nordberg, G. S. Ludwig, H. Tajima, Vipul Jain, R. Ehrlich, John Yelton, Ryszard Stroynowski, H. Kagan, P. Rankin, S. Playfer, R. J. Morrison, Mats A Selen, A. J. Sadoff, H. A. Cho, M. M. Zoeller, M. Ogg, G. Zhu, J. Urheim, C. R. Ng, B. Nemati, P. Rubin, Michael S. Witherell, M.K. Sung, M. Battle, F. Morrow, A. J.R. Weinstein, G. Masek, Juliet Ritchie Patterson, M. Procario, K. K. Gan, T. Skwarnicki, P. C. Kim, Horst Severini, M. Goldberg, G. C. Moneti, N. Horwitz, S.F. Schaffner, M. Chadha, Hubert Kroha, M. Athanas, Robert K. Kutschke, Karl Berkelman, N. Katayama, D. S. Akerib, G. Eigen, M. Worris, D. R. Johnson, T. Liu, M. Modesitt, A. P. Freyberger, J. Snow, M. S. Alam, N. Kwak, R. L. McIlwain, and A. V. Barnes

Subjects
Physics, Nuclear physics, Semileptonic decay, Particle physics, Rho meson, Pion, Branching fraction, Electron–positron annihilation, General Physics and Astronomy, B meson, Elementary particle, Combined result
Abstract

Using a sample of 935000 BB pairs collected with the CLEO-II detector at the Cornell Storage Ring, we have obtained upper limits on the branching ratios for the b→ul - υ#58 processes B - →ωl - υ#58, B - →ρ 0 l - υ#58, and B 0 →ρ + l - υ#58. The combined result using the relationships among the widths for these three modes is B(B - →ρ 0 l - υ#58)

Published
1993

166. Measurement of the tau -lepton mass

Author

N. Kwak, J. Whitmore, Jungil Lee, D. Perticone, M. Lambrecht, J. Urheim, I. P. J. Shipsey, Robert Wilson, Janice Nelson, C. D. Jones, Michael Wood, R. L. McIlwain, A. V. Barnes, B. Nemati, H. Tajima, M. Garcia-Sciveres, M. Battle, H. A. Cho, A. J.R. Weinstein, John E. Bartelt, G.R. Kalbfleisch, Vipul Jain, N. Hancock, K. Sparks, S. J. Patton, S. W. Gray, Ryszard Stroynowski, D. Z. Besson, Y. Skovpen, H. Yamamoto, F. Muheim, Barry C. Barish, R. Ehrlich, J. G. Smith, E. I. Shibata, C. R. Ng, D. M. Coffman, K. Lingel, N. Horwitz, M. Daoudi, M. Chadha, Michael S. Witherell, P. Rankin, M. Kelly, B. K. Heltsley, R. Wang, M. Sivertz, M.K. Sung, J. Mevissen, M. Sapper, E. H. Thorndike, Sheldon Stone, M. S. Alam, Marina Artuso, Paul Avery, Alice Bean, D. Coppage, J. P. Alexander, J. Kandaswamy, G. Masek, Juliet Ritchie Patterson, D. L. Kreinick, C. Bebek, M. Procario, M. Ogg, S. Schrenk, T. E. Browder, H. Worden, S. Roberts, Horst Severini, Shengfeng Yang, R. S. Galik, S. Menary, J. Dominick, J. A. Ernst, D. H. Miller, Cong Wang, R. L. Malchow, Christopher G. White, S. Sanghera, Pu Wang, M. Athanas, D. N. Brown, M. M. Zoeller, Hubert Kroha, Darin Acosta, Yoram Rozen, C. R. Sun, W. T. Ford, D. F. Cowen, V. Savinov, R. D. Kass, R. Balest, John Yelton, D. Peterson, R. Ammar, J. Gronberg, T. Miao, Philip Baringer, H. P. Paar, R. Fulton, H. Kagan, S. Chan, S. Ball, P. Skubic, E. Nordberg, N. Katayama, G. Zhu, G. S. Ludwig, S. Playfer, D. S. Akerib, J. S. Miller, G. Eigen, C. O'Grady, B. Geiser, M. Thulasidas, Robert K. Kutschke, Shawn W. Henderson, H. N. Nelson, X. Fu, Karl Berkelman, R. J. Morrison, Mats A Selen, P. Rubin, A. J. Sadoff, F. Morrow, W. R. Ross, K. K. Gan, T. Skwarnicki, P. C. Kim, D. L. Hartill, Daniel Schmidt, M. Goldberg, G. C. Moneti, S.F. Schaffner, N. Copty, J. Masui, Glen D. Crawford, J. L. Rodriguez, R. Stephens, Frank Würthwein, N. B. Mistry, M. Lohner, S. E. Csorna, F. Butler, J. J. O'Neill, K. Kinoshita, Ha Lam, J. D. Richman, M. Lattery, P. S. Drell, D. Riley, M. Saulnier, P. Wilson, Daniela Bortoletto, D. Cinabro, R. Kennett, Paul Sheldon, Yuichi Kubota, B. Gittelman, I. J. Kim, D. G. Cassel, R. Poling, K. Honscheid, M. Worris, D. R. Johnson, V. Romero, Z. Egyed, T. Liu, M. Modesitt, A. P. Freyberger, P. L. Wang, J. Snow, R. Davis, and B. Ong

Subjects
Massless particle, Physics, Particle physics, Particle decay, Computer Science::Information Retrieval, High Energy Physics::Experiment, Elementary particle, Fermion, Neutrino, Lepton
Abstract

Using data from the CLEO II detector at CESR, we measure the [tau]-lepton mass by exploiting the unique kinematics of events in which both [tau]'s decay hadronically. The result is [ital m][sub [tau]]=1777.8[plus minus]0.7[plus minus]1.7 MeV/[ital c][sup 2]. By comparing our result with other measurements near [tau]-pair threshold, we extract an upper limit on the [tau]-neutrino mass of 75 MeV/[ital c][sup 2] at 95% confidence level.

Published
1993

167. The LUX dark matter search

Author

F. L. H. Wolfs, P. Sorensen, A. Curioni, M. Sweany, E. Druszkiewicz, R. L. Mannino, M. Woods, Alexander Bolozdynya, R. L. Lander, Steven Dazeley, C. R. Hall, Dongming Mei, T. Classen, David Leonard, M. R. Dragowsky, Robert Svoboda, W. Skulski, S. Bedikian, Adam Bernstein, A. W. Bradley, J. Mock, Chao Zhang, N. Walsh, P. Phelps, R. J. Gaitskell, C. Hernandez Faham, D. S. Akerib, Daniel McKinsey, J. T. White, T.M. Stiegler, T. A. Shutt, E Dahl, R. C. Webb, L. de Viveiros, K. Clark, S. Fiorucci, L. Kastens, J.J. Chapman, J. Spaans, James Nikkel, Mani Tripathi, D.C. Malling, and Kareem Kazkaz

Subjects
Nuclear physics, Physics, History, Xenon, Time projection chamber, chemistry, Science and engineering, Dark matter, chemistry.chemical_element, Fiducial marker, Computer Science Applications, Education
Abstract

The Large Underground Xenon (LUX) experiment is a liquid xenon time projection chamber designed for extremely low levels of radioactive background in its fiducial volume. The overall liquid xenon mass is 300 kg, with a 100 kg fiducial mass. LUX is currently under construction, and integration of the full detector will begin in Fall 2009 at the Sanford Underground Science and Engineering Laboratory in South Dakota. The LUX sensitivity to the WIMP-nucleon spin-independent scattering cross-section will be 7 × 10-46 cm2 at 100 GeV after 300 days of low-background operation.

Published
2010

168. Electronic branching ratio of the tau lepton

Author

R. Ammar, P. Baringer, D. Coppage, R. Davis, M. Kelly, N. Kwak, H. Lam, S. Ro, Y. Kubota, M. Lattery, J. K. Nelson, D. Perticone, R. Poling, S. Schrenk, R. Wang, M. S. Alam, I. J. Kim, B. Nemati, V. Romero, C. R. Sun, P. -N. Wang, M. M. Zoeller, G. Crawford, R. Fulton, K. K. Gan, H. Kagan, R. Kass, J. Lee, R. Malchow, F. Morrow, M. K. Sung, J. Whitmore, P. Wilson, F. Butler, X. Fu, G. Kalbfleisch, M. Lambrecht, P. Skubic, J. Snow, P. -L. Wang, D. Bortoletto, D. N. Brown, J. Dominick, R. L. McIlwain, D. H. Miller, M. Modesitt, E. I. Shibata, S. F. Schaffner, I. P. J. Shipsey, M. Battle, J. Ernst, H. Kroha, S. Roberts, K. Sparks, E. H. Thorndike, C. -H. Wang, R. Stroynowski, M. Artuso, M. Goldberg, T. Haupt, N. Horwitz, R. Kennett, G. C. Moneti, S. Playfer, Y. Rozen, P. Rubin, T. Skwarnicki, S. Stone, M. Thulasidas, W. -M. Yao, G. Zhu, A. V. Barnes, J. Bartelt, S. E. Csorna, V. Jain, T. Letson, M. D. Mestayer, D. S. Akerib, B. Barish, M. Chadha, D. F. Cowen, G. Eigen, J. S. Miller, J. Urheim, A. J. Weinstein, R. J. Morrison, H. Tajima, D. Schmidt, D. Sperka, M. Procario, M. Daoudi, W. T. Ford, D. R. Johnson, K. Lingel, M. Lohner, P. Rankin, J. G. Smith, J. Alexander, C. Bebek, K. Berkelman, D. Besson, T. E. Browder, D. G. Cassel, E. Cheu, D. M. Coffman, P. S. Drell, R. Ehrlich, R. S. Galik, M. Garcia-Sciveres, B. Geiser, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. Heltsley, K. Honscheid, C. Jones, J. Kandaswamy, N. Katayama, P. C. Kim, D. L. Kreinick, G. S. Ludwig, J. Masui, J. Mevissen, N. B. Mistry, S. Nandi, C. R. Ng, E. Nordberg, C. O'Grady, J. R. Patterson, D. Peterson, D. Riley, M. Sapper, M. Selen, H. Worden, M. Worris, F. Würthwein, P. Avery, A. Freyberger, J. Rodriguez, J. Yelton, S. Henderson, K. Kinoshita, F. Pipkin, M. Saulnier, R. Wilson, J. Wolinski, D. Xiao, H. Yamamoto, and A. J. Sadoff

Subjects
Physics, Particle physics, Particle decay, Branching fraction, Computer Science::Information Retrieval, High Energy Physics::Experiment, Elementary particle, Fermion, Cornell Electron Storage Ring, Charged particle, Lepton, Standard Model
Abstract

Using data accumulated by the CLEO I detector operating at the Cornell Electron Storage Ring, we have measured the ratio {ital R}={Gamma}({tau}{r arrow}{ital e}{bar {nu}}{sub {ital e}}{nu}{sub {tau}})/{Gamma}{sub 1}, where {Gamma}{sub 1} is the {tau} decay rate to final states with one charged particle. We find {ital R}=0.2231{plus minus}0.0044{plus minus}0.0073 where the first error is statistical and the second is systematic. Together with the measured topological one-charged-particle branching fraction, this yields the branching fraction of the {tau} lepton to electrons, {ital B}{sub {ital e}}=0.192{plus minus}0.004{plus minus}0.006.

Published
1992

169. Recent results on rare K+ decays from BNL E787

Author

T. Numao, I. H. Chiang, K. K. Li, A. S. Turcot, T. F. Kycia, Douglas Bryman, Ewart W. Blackmore, F. C. Shoemaker, W. C. Louis, M. S. Atiya, M. M. Ito, Mats A Selen, P. Kitching, J. M. Poutissou, Daniel Robert Marlow, J. S. Haggerty, R. C. Strand, A. Konaka, J. S. Frank, R. Soluk, L. Felawka, A. J.S. Smith, R. Poutissou, L. S. Littenberg, D. S. Akerib, Y. Kuno, A. Sambamurti, Peter Daniel Meyers, J. Roy, J. A. Macdonald, A. J. Stevens, and P. Padley

Subjects
Physics, Nuclear physics, Particle decay, Particle physics, Upgrade, Branching fraction, National laboratory, Standard Model
Abstract

Experiment 787, now in progress at Brookhaven National Laboratory (BNL), is designed to measure the process K+→π+νν. A preliminary upper limit for this process was recently obtained Γ(K+→π+νν/Γ(K+→all)

Published
1992

170. The Cryogenic Dark Matter Search (CDMS) experiment: Results and prospects

Author

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

Subjects
Physics, History, Particle physics, Cold dark matter, Large Underground Xenon experiment, WIMP, Axion Dark Matter Experiment, Weakly interacting massive particles, Warm dark matter, Cryogenic Dark Matter Search, Light dark matter, Computer Science Applications, Education
Abstract

Weakly Interacting Massive Particles (WIMPs) are a strong candidate for the Cold Dark Matter of the Universe. CDMS-II is a direct-search WIMP search experiment, operating at 50 mK and housed at the Soudan mine, Minnesota. The 250 gram Ge detectors utilize athermal phonon sensors where tungsten transition edge sensors are operated in negative electrothermal feedback. The search at Soudan is ongoing with an expected final reach of CDMS-II by the end of 2008 of a WIMP-nucleon cross-section sensitivity of 2.1 x10-44 cm2, at a WIMP mass of 60 GeV/c2. To proceed further, we have proposed the SuperCDMS program.

Published
2009

171. Simultaneous measurement of phonons and ionization produced by photons in a 60 g germanium crystal at 25mK: A new method for studying impurity sites in semiconductors

Author

G. Smith, Peter D. Barnes, J. Emes, Ronald R. Ross, Simon D. M. White, Bernard Sadoulet, A. Da Silva, E. Aubourg, W. Stockwell, Betty A. Young, T. A. Shutt, Andrew E. Lange, Eugene E. Haller, D. S. Akerib, and A. C. Cummings

Subjects
Photon, Materials science, Condensed matter physics, Phonon, business.industry, Phonon energy, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Condensed Matter::Materials Science, Semiconductor, Impurity, Condensed Matter::Superconductivity, Ionization, Particle, Condensed Matter::Strongly Correlated Electrons, Electrical and Electronic Engineering, Germanium crystal, Atomic physics, business
Abstract

We report on the simultaneous measurement of charges and phonons created by particle interactions in a semiconductor at 20 mK. We find that the phonon energy is correlated to the number of charges collected, an effect we model in terms of capture of charges by impurities.

Published
1994

172. A study of

Author

K. K. Li, Douglas Bryman, A. Stevens, T. F. Kycia, M. S. Atiya, F. C. Shoemaker, James Frank, R. Poutissou, Mats A Selen, T. Numao, J. S. Haggerty, P. Kitching, J. A. Macdonald, I-Hung Chiang, L. Felawka, Georges Azuelos, Y. Kuno, J. M. Poutissou, P. Padley, R. C. Strand, Daniel Robert Marlow, A. J.S. Smith, Ewart W. Blackmore, M. M. Ito, W. C. Louis, J. Roy, P. D. Meyers, L. S. Littenberg, and D. S. Akerib

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Detector, Statistical physics, Atomic and Molecular Physics, and Optics
Abstract

A description of the detector and of preliminary results of work in progress in its performance is presented here for an experiment to study the decay of K + → π + ν ν .

Published
1989

173. Search for a light Higgs boson in the decayK+→π+H, H→μ+μ−

Author

T. Numao, Mats A Selen, R. Poutissou, F. C. Shoemaker, R. C. Strand, J. M. Poutissou, Peter Daniel Meyers, I. H. Chiang, J. S. Frank, Y. Kuno, J. A. Macdonald, J. Roy, T. F. Kycia, M. S. Atiya, W. C. Louis, A. J. Stevens, Georges Azuelos, J. S. Haggerty, A. J.S. Smith, Daniel Robert Marlow, K. K. Li, Douglas Bryman, M. M. Ito, P. Padley, L. S. Littenberg, D. S. Akerib, Ewart W. Blackmore, P. Kitching, L. Felawka, and Michael Hildreth

Subjects
Physics, Particle decay, Particle physics, Crystallography, Pion, Muon, Meson, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Hadron, Higgs boson, General Physics and Astronomy, Elementary particle
Abstract

An upper limit on the branching ratio of the decay {ital K}{sup +}{r arrow}{pi}{sup +}H, {ital H}{r arrow}{mu}{sup +}{mu}{sup {minus}} is set at 1.5{times}10{sup {minus}7} at the 90% confidence level, for a Higgs-boson mass in the interval 220{lt}{ital m}{sub {ital H}}{lt}320 MeV/{ital c}{sup 2}. In addition, 90%-confidence-level upper limits on the branching ratios of the decays {ital K}{sup +}{r arrow}{pi}{sup +}{mu}{sup +}{mu}{sup {minus}} and {ital K}{sup +}{r arrow}{mu}{sup +}{nu}{mu}{sup +}{mu}{sup {minus}} are set at 2.3{times}10{sup {minus}7} and 4.1{times}10{sup {minus}7}, respectively.

Published
1989

174. Search for the Rare Decay K+? ?+vv?

Author

T. F. Kycia, W. C. Louis, J. S. Frank, A. Sambamurti, Ewart W. Blackmore, M. S. Atiya, M. M. Ito, Daniel Robert Marlow, F. C. Shoemaker, Y. Kuno, Peter Daniel Meyers, J. Roy, K. K. Li, A. J. Stevens, I. H. Chiang, Douglas Bryman, Georges Azuelos, Mats A Selen, R. C. Strand, P. Kitching, J. S. Haggerty, T. Numao, L. S. Littenberg, J. A. Macdonald, A. Konaka, A. J.S. Smith, D. S. Akerib, R. Poutissou, J. M. Poutissou, L. Felawka, A. S. Turcot, and P. Padley

Subjects
Physics, History and Philosophy of Science, General Neuroscience, General Biochemistry, Genetics and Molecular Biology
Published
1989

175. Search for the Rare Decay K+? ?+vv?

Author

J. M. Poutissou, L. S. Littenberg, L. Felawka, D. S. Akerib, Georges Azuelos, W. C. Louis, A. J.S. Smith, J. A. Macdonald, R. C. Strand, J. S. Frank, A. Konaka, R. Poutissou, K. K. Li, M. M. Ito, F. C. Shoemaker, Douglas Bryman, J. Roy, Mats A Selen, P. Kitching, A. J. Stevens, Daniel Robert Marlow, T. F. Kycia, I. H. Chiang, Ewart W. Blackmore, A. Sambamurti, Peter Daniel Meyers, M. S. Atiya, A. S. Turcot, P. Padley, Y. Kuno, J. S. Haggerty, and T. Numao

Subjects
Physics, History and Philosophy of Science, General Neuroscience, General Biochemistry, Genetics and Molecular Biology
Published
1989

176. First Results of the LUX Dark Matter Experiment

Author

Kareem Kazkaz, M. Hanhardt, P. Phelps, A. Manalaysay, L. Tvrznikova, A. Dobi, Ethan Bernard, J.J. Chapman, M. Horn, M. C. Carmona-Benitez, S. Fiorucci, D. J. Taylor, T. A. Shutt, J. E. Y. Dobson, A. Currie, K.R. Gibson, P. Beltrame, A. J. Bailey, V. M. Gehman, D.C. Malling, Matthew Szydagis, H. N. Nelson, D. Byram, R. G. Jacobsen, C. Chiller, J.R. Verbus, J. A. Morad, Catarina Silva, P. Sorensen, C. Chan, Henrique Araujo, F. Neves, K. T. Lesko, D. Q. Huang, B. P. Tennyson, N. A. Larsen, C. Lee, S. A. Hertel, Mani Tripathi, E. Druszkiewicz, Sidney Cahn, M. Ihm, R. A. Ott, S. Uvarov, C. H. Faham, A. Lindote, L. Reichhart, M. Moongweluwan, B. Lenardo, C. R. Hall, P. D. Parker, C. Ghag, L. de Viveiros, R. C. Webb, D. R. Tiedt, Dongming Mei, A. A. Chiller, B. N. Edwards, E. K. Pease, S. J. Haselschwardt, V. N. Solovov, Michael S. Witherell, Chao Zhang, R. J. Gaitskell, J. T. White, X. Bai, J. Mock, M. Woods, C. E. Flores, N. Walsh, J. Balajthy, A. St. J. Murphy, Adam Bernstein, M. Pangilinan, M.I. Lopes, A. W. Bradley, R. Knoche, R. L. Mannino, M. G. D. Gilchriese, F. L. H. Wolfs, Daniel McKinsey, K. O'Sullivan, K. Pech, T. J. Sumner, D. S. Akerib, and C. Nehrkorn

Subjects
Physics, Elastic scattering, Nuclear and High Energy Physics, Time projection chamber, Large Underground Xenon experiment, 010308 nuclear & particles physics, WIMP, Dark matter, chemistry.chemical_element, Astrophysics, 01 natural sciences, dark matter, time projection chamber, Nuclear physics, Xenon, chemistry, 0103 physical sciences, liquid xenon, 010306 general physics
Abstract

© 2015 Elsevier B.V.. LUX (Large Underground Xenon) is a dark matter direct detection experiment deployed at the 4850' level of the Sanford Underground Research Facility (SURF) in Lead, SD, operating a 370 kg dual-phase xenon TPC. Results of the first WIMP search run were presented in late 2013, for the analysis of 85.3 live-days with a fiducial volume of 118 kg, taken during the period of April to August 2013. The experiment exhibited a sensitivity to spin-independent WIMP-nucleon elastic scattering with a minimum upper limit on the cross section of 7.6×10-46cm2at a WIMP mass of 33 GeV/c2, becoming the world's leading WIMP search result, in conflict with several previous claimed hints of discovery.

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177. WIMP exclusion results from the CDMS experiment

Author

D. A. Bauer, Laura Baudis, C. Maloney, Tarek Saab, P. L. Brink, M. E. Huber, D. N. Seitz, G. Wang, A. M. Smith, Ronald R. Ross, P. Meunier, C. Chang, A. Lu, D. O. Caldwell, J. P. Thomson, J. P. Castle, D. Driscoll, R. J. Gaitskell, M. S. Armel, Vuk Mandic, J. Sander, John M. Martinis, J. Emes, W. Rau, M. B. Crisler, R. Bunker, R. L. Dixon, Donald J. Holmgren, Thushara Perera, R. W. Schnee, S. J. Yellin, R. Mahapatra, S. Kamat, D. S. Akerib, H. N. Nelson, G. Smith, Blas Cabrera, T. A. Shutt, Bernard Sadoulet, and B. A. Young

Subjects
Physics, Particle physics, WIMP, Dark matter

178. Calibration, event reconstruction, data analysis, and limit calculation for the LUX dark matter experiment

Author

L. Tvrznikova, S. Shaw, W. Ji, J. E. Cutter, A. Currie, V. Velan, A. Dobi, H. N. Nelson, A. Lindote, L. Reichhart, M. G. D. Gilchriese, D. Byram, A. J. Bailey, T. P. Biesiadzinski, P. Brás, X. Bai, K. Kazkaz, M. Horn, Matthew Szydagis, Daniel McKinsey, C. Rhyne, R. J. Gaitskell, J. Mock, S. Fiorucci, E. M. Boulton, R. L. Mannino, Chao Zhang, M. C. Carmona-Benitez, T. A. Shutt, Sarah Young, C. H. Faham, D. R. Tiedt, Blair Edwards, Henrique Araujo, C. M. Ignarra, J. A. Morad, J. E. Y. Dobson, B. G. Lenardo, K. Kamdin, T. J. Whitis, C. Ghag, P. Beltrame, C. R. Hall, K. T. Lesko, N. A. Larsen, J.R. Verbus, T. J. Sumner, Sidney Cahn, D. P. Hogan, S. J. Haselschwardt, J. Genovesi, Jilei Xu, M. Solmaz, C. Nehrkorn, Dongming Mei, Ching Hua Lee, D. J. Taylor, T. J. R. Davison, M. F. Marzioni, D. Q. Huang, F. Neves, J. T. White, Mani Tripathi, D. S. Akerib, R. C. Webb, A. St. J. Murphy, Adam Bernstein, S. Uvarov, M.I. Lopes, R. Knoche, M. Hanhardt, V.M. Gehman, A. Manalaysay, D. Khaitan, S. R. Fallon, Ethan Bernard, Michael S. Witherell, K. J. Palladino, S. Alsum, M. Moongweluwan, E. K. Pease, C. Silva, V. N. Solovov, K. C. Oliver-Mallory, W. H. To, C. Chan, A. Fan, K. O'Sullivan, F.L.H. Wolfs, W. C. Taylor, P. Sorensen, J. Balajthy, B. P. Tennyson, P. A. Terman, S. A. Hertel, E. Druszkiewicz, K. Yazdani, and R. G. Jacobsen

Subjects
SIMULATION TOOLKIT, Photomultiplier, Physics - Instrumentation and Detectors, Photon, Dark matter, FOS: Physical sciences, chemistry.chemical_element, Bioengineering, Astronomy & Astrophysics, Atomic, 01 natural sciences, Physics, Particles & Fields, Particle and Plasma Physics, Optics, Xenon, Affordable and Clean Energy, 0103 physical sciences, Calibration, SCATTERING, Nuclear, 010306 general physics, DETECTOR, physics.ins-det, Event reconstruction, NOBLE-GASES, Physics, Quantum Physics, Scintillation, Science & Technology, 010308 nuclear & particles physics, business.industry, Scattering, 2-PHASE XENON, Astrophysics::Instrumentation and Methods for Astrophysics, LIQUID XENON, Molecular, Instrumentation and Detectors (physics.ins-det), Nuclear & Particles Physics, MODEL, chemistry, Physical Sciences, IONIZATION, ELECTRON-EMISSION, SCINTILLATION, business, Astronomical and Space Sciences
Abstract

The LUX experiment has performed searches for dark matter particles scattering elastically on xenon nuclei, leading to stringent upper limits on the nuclear scattering cross sections for dark matter. Here, for results derived from ${1.4}\times 10^{4}\;\mathrm{kg\,days}$ of target exposure in 2013, details of the calibration, event-reconstruction, modeling, and statistical tests that underlie the results are presented. Detector performance is characterized, including measured efficiencies, stability of response, position resolution, and discrimination between electron- and nuclear-recoil populations. Models are developed for the drift field, optical properties, background populations, the electron- and nuclear-recoil responses, and the absolute rate of low-energy background events. Innovations in the analysis include in situ measurement of the photomultipliers' response to xenon scintillation photons, verification of fiducial mass with a low-energy internal calibration source, and new empirical models for low-energy signal yield based on large-sample, in situ calibrations.

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179. Results from a Search for Dark Matter in the Complete LUX Exposure

Author

M. Hanhardt, K.R. Gibson, A. Bernstein, E. M. Boulton, A. Manalaysay, W. H. To, T. J. Sumner, Ethan Bernard, M. G. D. Gilchriese, R. Bramante, R.G. Jacobsen, X. Bai, Matthew Szydagis, Sidney Cahn, B. P. Tennyson, D. Khaitan, Henrique Araujo, J.R. Verbus, Jilei Xu, C. Nehrkorn, J. Mock, A. St. J. Murphy, D. Q. Huang, S. Stephenson, D. J. Taylor, C. Chan, L. Tvrznikova, C. R. Hall, B. G. Lenardo, Sarah Young, M. F. Marzioni, D. R. Tiedt, D. Byram, C. M. Ignarra, M.I. Lopes, M. Ihm, S. Shaw, R. Knoche, S. Uvarov, P. Phelps, R. L. Mannino, S. J. Haselschwardt, J. T. White, K. O’Sullivan, M. Horn, M. S. Witherell, V. M. Gehman, Daniel McKinsey, N.A. Larsen, S. Alsum, B. N. Edwards, T. P. Biesiadzinski, F.L.H. Wolfs, P. Brás, M. Moongweluwan, K. J. Palladino, W. Ji, P. A. Terman, S. A. Hertel, K. Kazkaz, E. Druszkiewicz, C. Chiller, K. Yazdani, S. Fiorucci, M. C. Carmona-Benitez, E. K. Pease, C. Silva, V. N. Solovov, K. Kamdin, P. Beltrame, Mani Tripathi, K. C. Oliver-Mallory, W. C. Taylor, D. S. Akerib, J. Balajthy, D. M. Mei, P. Sorensen, T. J. R. Davison, R. C. Webb, C. H. Faham, C. Ghag, M. Solmaz, J. E. Cutter, A. Lindote, L. Reichhart, T. A. Shutt, J. A. Morad, J. E. Y. Dobson, A. J. Bailey, C. Rhyne, A. Dobi, H. N. Nelson, A.A. Chiller, A. Currie, T. J. Whitis, R. J. Gaitskell, D. P. Hogan, F. Neves, Chao Zhang, K. T. Lesko, C. Lee, and Science and Technology Facilities Council (STFC)

Subjects
General Physics, Physics - Instrumentation and Detectors, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Dark matter, Physics, Multidisciplinary, Massive particle, General Physics and Astronomy, chemistry.chemical_element, FOS: Physical sciences, 01 natural sciences, 09 Engineering, High Energy Physics - Experiment, LUX Collaboration, Nuclear physics, High Energy Physics - Experiment (hep-ex), Xenon, WIMP, 0103 physical sciences, Sensitivity (control systems), 010306 general physics, physics.ins-det, Instrumentation and Methods for Astrophysics (astro-ph.IM), 01 Mathematical Sciences, Physics, Time projection chamber, Science & Technology, 02 Physical Sciences, 010308 nuclear & particles physics, Scattering, hep-ex, Instrumentation and Detectors (physics.ins-det), chemistry, Physical Sciences, astro-ph.CO, CHAMBERS, PandaX, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics, astro-ph.IM
Abstract

We report constraints on spin-independent weakly interacting massive particle (WIMP)-nucleon scattering using a 3.35e4 kg-day exposure of the Large Underground Xenon (LUX) experiment. A dual-phase xenon time projection chamber with 250 kg of active mass is operated at the Sanford Underground Research Facility under Lead, South Dakota (USA). With roughly fourfold improvement in sensitivity for high WIMP masses relative to our previous results, this search yields no evidence of WIMP nuclear recoils. At a WIMP mass of 50 GeV/c^2, WIMP-nucleon spin-independent cross sections above 2.2e-46 cm^2 are excluded at the 90% confidence level. When combined with the previously reported LUX exposure, this exclusion strengthens to 1.1e-46 cm^2 at 50 GeV/c^2., Comment: This version includes a combined analysis with previously published LUX results, and matches the version published in PRL

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