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New results on low-mass dark matter from the CRESST-II experiment

Journal of Physics: Conference Series Institute of Physics 718:4 (2016) 042044

Authors:

Godehard Angloher, Antonio Bento, Carlo Bucci, Lucia Canonica, Xavier Defay, Andreas Erb, Franz von Feilitzsch, Nahuel Ferreiro Iachellini, Paolo Gorla, Achim Gütlein, Dieter Hauff, Josef Jochum, Margit Kiefer, Holger Kluck, Hans Kraus, Jean-Come Lanfranchi, Jurek Loebell, Andrea Münster, Carmine Pagliarone, Federica Petricca, Walter Potzel, Franz Pröbst, Florian Reindl, Karoline Schäffner, Jochen Schieck, Stefan Schönert, Wolfgang Seidel, Leo Stodolsky, Christian Strandhagen, Raimund Strauss, Anja Tanzke, Hong H Trinh Thi, Cenk Türkoğlu, Martin Uffinger, Andreas Ulrich, Igor Usherov, Stephan Wawoczny, Michaels Willers, Marc Wüstrich, Andreas Zöller

Abstract:

The CRESST-II experiment is searching for dark matter particles via their elastic scattering off nuclei in a target material. The CRESST target consists of scintillating CaWO4 crystals which are operated as cryogenic calorimeters at millikelvin temperatures and read out by transition edge sensors. Each interaction in the CaWO4 target crystal produces a phonon signal and also a light signal that is measured by a secondary cryogenic calorimeter. The low energy thresholds of these detectors, combined with the presence of light nuclei in the target material, allow to probe the low-mass region of the parameter space for spin-independent dark matter-nucleon scattering with high sensitivity. In this contribution results from a blind analysis of one detector module operated in the latest measurement campaign are presented. An unprecedented sensitivity for the light dark matter has been obtained with 52kg live days and a threshold of 307eV for nuclear recoils, extending the reach of direct dark matter searches to the sub-GeV/c2 region.
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Chromatographic separation of radioactive noble gases from xenon

(2016)

Authors:

LUX Collaboration, DS Akerib, HM Araújo, X Bai, AJ Bailey, J Balajthy, P Beltrame, EP Bernard, A Bernstein, TP Biesiadzinski, EM Boulton, R Bramante, SB Cahn, MC Carmona-Benitez, C Chan, AA Chiller, C Chiller, T Coffey, A Currie, JE Cutter, TJR Davison, A Dobi, JEY Dobson, E Druszkiewicz, BN Edwards, CH Faham, S Fiorucci, RJ Gaitskell, VM Gehman, C Ghag, KR Gibson, MGD Gilchriese, CR Hall, M Hanhardt, SJ Haselschwardt, SA Hertel, DP Hogan, M Horn, DQ Huang, CM Ignarra, M Ihm, RG Jacobsen, W Ji, K Kamdin, K Kazkaz, D Khaitan, R Knoche, NA Larsen, C Lee, BG Lenardo, KT Lesko, A Lindote, MI Lopes, A Manalaysay, RL Mannino, MF Marzioni, DN McKinsey, D-M Mei, J Mock, M Moongweluwan, JA Morad, A St J Murphy, C Nehrkorn, HN Nelson, F Neves, K O'Sullivan, KC Oliver-Mallory, KJ Palladino, EK Pease, K Pech, P Phelps, L Reichhart, C Rhyne, S Shaw, TA Shutt, C Silva, VN Solovov, P Sorensen, S Stephenson, TJ Sumner, M Szydagis, DJ Taylor, W Taylor, BP Tennyson, PA Terman, DR Tiedt, WH To, M Tripathi, L Tvrznikova, S Uvarov, JR Verbus, RC Webb, JT White, TJ Whitis, MS Witherell, FLH Wolfs, K Yazdani, SK Young, C Zhang
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Constraints on low-mass WIMPs from the EDELWEISS-III dark matter search

Journal of Cosmology and Astroparticle Physics Insitute of Physics 2016:05 (2016) 019

Authors:

Eric Armengaud, Junsong Lin, Michelle Mancuso, Stefanos Marnieros, Alexander Menshikov, Xavier-Francois Navick, Claudia Nones, Emiliano Olivieri, Patrick Pari, Bernard Paul, Marie-Cécile Piro, Denys V Poda, Emeline Queguiner, Matthew Robinson, Henri Rodenas, Sergey Rozov, Véronique Sanglard, Benjamin Schmidt, Silvia Scorza, Bernhard Siebenborn, Denis Tcherniakhovski, Lionel Vagneron, Marc Weber, Evgeny Yakushev, Xiohe Zhang

Abstract:

We present the results of a search for elastic scattering from galactic dark matter in the form of Weakly Interacting Massive Particles (WIMPs) in the 4-30 GeV/c2 mass range. We make use of a 582 kg-day fiducial exposure from an array of 800 g Germanium bolometers equipped with a set of interleaved electrodes with full surface coverage. We searched specifically for ∼ 2.5-20 keV nuclear recoils inside the detector fiducial volume. As an illustration the number of observed events in the search for 5 (resp. 20) GeV/c2 WIMPs are 9 (resp. 4), compared to an expected background of 6.1 (resp. 1.4). A 90% CL limit of 4.3 × 10-40 cm2 (resp. 9.4 × 10-44 cm2) is set on the spin-independent WIMP-nucleon scattering cross-section for 5 (resp. 20) GeV/c2 WIMPs. This result represents a 41-fold improvement with respect to the previous EDELWEISS-II low-mass WIMP search for 7 GeV/c2 WIMPs. The derived constraint is in tension with hints of WIMP signals from some recent experiments, thus confirming results obtained with different detection techniques.
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FPGA-based trigger system for the LUX dark matter experiment

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment Elsevier 818 (2016) 57-67

Authors:

DS Akerib, HM Araújo, X Bai, AJ Bailey, J Balajthy, P Beltrame, EP Bernard, A Bernstein, TP Biesiadzinski, EM Boulton, A Bradley, R Bramante, SB Cahn, MC Carmona-Benitez, C Chan, JJ Chapman, AA Chiller, C Chiller, A Currie, JE Cutter, TJR Davison, L de Viveiros, A Dobi, JEY Dobson, E Druszkiewicz, BN Edwards, CH Faham, S Fiorucci, RJ Gaitskell, VM Gehman, C Ghag, KR Gibson, MGD Gilchriese, CR Hall, M Hanhardt, SJ Haselschwardt, SA Hertel, DP Hogan, M Horn, DQ Huang, CM Ignarra, M Ihm, RG Jacobsen, W Ji, K Kazkaz, D Khaitan, R Knoche, NA Larsen, C Lee, BG Lenardo, KT Lesko, A Lindote, MI Lopes, DC Malling, AG Manalaysay, RL Mannino, MF Marzioni, DN McKinsey, D-M Mei, J Mock, M Moongweluwan, JA Morad, Murphy, C Nehrkorn, HN Nelson, F Neves, K O׳Sullivan, KC Oliver-Mallory, RA Ott, KJ Palladino, M Pangilinan, EK Pease, P Phelps, L Reichhart, C Rhyne, S Shaw, TA Shutt, C Silva, W Skulski, VN Solovov, P Sorensen, S Stephenson, TJ Sumner, M Szydagis, DJ Taylor, W Taylor, BP Tennyson, PA Terman, DR Tiedt, WH To, M Tripathi, L Tvrznikova, S Uvarov, JR Verbus, RC Webb, JT White, TJ Whitis, MS Witherell, FLH Wolfs, J Yin, SK Young, C Zhang
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New Limits on Double Electron Capture of $^{40}$Ca and $^{180}$W

(2016)

Authors:

G Angloher, M Bauer, P Bauer, I Bavykina, A Bento, C Bucci, L Canonica, C Ciemniak, X Defay, G Deuter, A Erb, FV Feilitzsch, N Ferreiro Iachellini, P Gorla, A Gütlein, D Hauff, P Huff, C Isaila, J Jochum, M Kiefer, M Kimmerle, H Kluck, H Kraus, J-C Lanfranchi, J Loebell, A Münster, C Pagliarone, F Petricca, S Pfister, W Potzel, F Pröbst, F Reindl, S Roth, K Rottler, C Sailer, K Schäffner, J Schieck, J Schmaler, S Scholl, S Schönert, W Seidel, MV Sivers, L Stodolsky, C Strandhagen, R Strauss, A Tanzke, V Tretyak, HH Trinh Thi, C Türkoğlu, M Uffinger, A Ulrich, I Usherov, S Wawoczny, M Willers, M Wüstrich, A Zöller
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