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Start Over Author "Pech, K" Publisher escholarship, university of california
15 results on '"Pech, K"'

1. Chromatographic separation of radioactive noble gases from xenon

Author

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

Subjects
Nuclear and Plasma Physics, Synchrotrons and Accelerators, Physical Sciences, Xenon, Krypton, Adsorption, Chromatography, Gas Separation, Dark Matter, physics.ins-det, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, Astronomical sciences, Particle and high energy physics
Abstract

The Large Underground Xenon (LUX) experiment operates at the Sanford Underground Research Facility to detect nuclear recoils from the hypothetical Weakly Interacting Massive Particles (WIMPs) on a liquid xenon target. Liquid xenon typically contains trace amounts of the noble radioactive isotopes 85Kr and 39Ar that are not removed by the in situ gas purification system. The decays of these isotopes at concentrations typical of research-grade xenon would be a dominant background for a WIMP search experiment. To remove these impurities from the liquid xenon, a chromatographic separation system based on adsorption on activated charcoal was built. 400 kg of xenon was processed, reducing the average concentration of krypton from 130 ppb to 3.5 ppt as measured by a cold-trap assisted mass spectroscopy system. A 50 kg batch spiked to 0.001 g/g of krypton was processed twice and reduced to an upper limit of 0.2 ppt.

Published
2018

2. First Results of the LUX Dark Matter Experiment

Author

Carmona-Benitez, MC, Collaboration, LUX, Akerib, DS, Araújo, HM, Bai, X, Bailey, AJ, Balajthy, J, Beltrame, P, Bernard, E, Bernstein, A, Bradley, A, Byram, D, Cahn, SB, Chan, C, Chapman, JJ, Chiller, AA, Chiller, C, Currie, A, de Viveiros, L, Dobi, A, Dobson, J, Druszkiewicz, E, Edwards, B, Faham, CH, Fiorucci, S, Flores, C, Gaitskell, RJ, Gehman, VM, Ghag, C, Gibson, KR, Gilchriese, MGD, Hall, C, Hanhardt, M, Haselschwardt, S, Hertel, SA, Horn, M, Huang, DQ, Ihm, M, Jacobsen, RG, Kazkaz, K, Knoche, R, Larsen, NA, Lee, C, Lenardo, B, Lesko, KT, Lindote, A, Lopes, MI, Malling, DC, Manalaysay, A, Mannino, R, McKinsey, DN, Mei, D-M, Mock, J, Moongweluwan, M, Morad, J, Murphy, Nehrkorn, C, Nelson, H, Neves, F, Ott, RA, Pangilinan, M, Parker, PD, Pease, EK, Pech, K, Phelps, P, Reichhart, L, Shutt, T, Silva, C, Solovov, VN, Sorensen, P, O'Sullivan, K, Sumner, TJ, Szydagis, M, Taylor, D, Tennyson, B, Tiedt, DR, Tripathi, M, Tvrznikova, L, Uvarov, S, Verbus, JR, Walsh, N, Webb, R, White, JT, Witherell, MS, Wolfs, FLH, Woods, M, and Zhang, C

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, dark matter, WIMP, liquid xenon, time projection chamber
Abstract

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 7.6×10-46cm2 at a WIMP mass of 33 GeV/c2, becoming the world's leading WIMP search result, in conflict with several previous claimed hints of discovery.

Published
2016

3. Results from the LUX dark matter experiment

Author

Horn, M, Akerib, DS, Araújo, HM, Bai, X, Bailey, AJ, Balajthy, J, Bernard, E, Bernstein, A, Bradley, A, Byram, D, Cahn, SB, Carmona-Benitez, MC, Chan, C, Chapman, JJ, Chiller, AA, Chiller, C, Currie, A, De Viveiros, L, Dobi, A, Dobson, J, Druszkiewicz, E, Edwards, B, Faham, CH, Fiorucci, S, Flores, C, Gaitskell, RJ, Gehman, VM, Ghag, C, Gibson, KR, Gilchriese, MGD, Hall, C, Hanhardt, M, Haselschwardt, S, Hertel, SA, Huang, DQ, Ihm, M, Jacobsen, RG, Kazkaz, K, Knoche, R, Larsen, NA, Lee, C, Lenardo, B, Lesko, KT, Lindote, A, Lopes, MI, Malling, DC, Mannino, R, McKinsey, DN, Mei, DM, Mock, J, Moongweluwan, M, Morad, J, Murphy, ASJ, Nehrkorn, C, Nelson, H, Neves, F, Ott, RA, Pangilinan, M, Parker, PD, Pease, EK, Pech, K, Phelps, P, Reichhart, L, Shutt, T, Silva, C, Solovov, VN, Sorensen, P, O'Sullivan, K, Sumner, TJ, Szydagis, M, Taylor, D, Tennyson, B, Tiedt, DR, Tripathi, M, Uvarov, S, Verbus, JR, Walsh, N, Webb, R, White, JT, Witherell, MS, Wolfs, FLH, Woods, M, and Zhang, C

Subjects
Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Other Physical Sciences, Nuclear & Particles Physics, Nuclear and plasma physics
Abstract

The LUX (Large Underground Xenon) experiment aims at the direct detection of dark matter particles via their collisions with xenon nuclei. The 370 kg two-phase liquid xenon time projection chamber measures simultaneously the scintillation and ionization from interactions in the target. The ratio of these two signals provides very good discrimination between potential nuclear recoil and electronic recoil signals to search for WIMP-nucleon scattering. The LUX detector operates at the Sanford Underground Research Facility (Lead, South Dakota, USA) since February 2013. First results were presented in late 2013 setting the world's most stringent limits on WIMP-nucleon scattering cross-sections over a wide range of WIMP masses. A 300 day run beginning in 2014 will further improve the sensitivity and new calibration techniques will reduce systematics for the WIMP signal search.

Published
2015

4. Results from the LUX dark matter experiment

Author

Horn, Markus, Akerib, DS, Araújo, HM, Bai, X, Bailey, AJ, Balajthy, J, Bernard, E, Bernstein, A, Bradley, A, Byram, D, Cahn, SB, Carmona-Benitez, MC, Chan, C, Chapman, JJ, Chiller, AA, Chiller, C, Currie, A, de Viveiros, L, Dobi, A, Dobson, J, Druszkiewicz, E, Edwards, B, Faham, CH, Fiorucci, S, Flores, C, Gaitskell, RJ, Gehman, VM, Ghag, C, Gibson, KR, Gilchriese, MGD, Hall, C, Hanhardt, M, Haselschwardt, S, Hertel, SA, Huang, DQ, Ihm, M, Jacobsen, RG, Kazkaz, K, Knoche, R, Larsen, NA, Lee, C, Lenardo, B, Lesko, KT, Lindote, A, Lopes, MI, Malling, DC, Mannino, R, McKinsey, DN, Mei, D-M, Mock, J, Moongweluwan, M, Morad, J, Murphy, Nehrkorn, C, Nelson, H, Neves, F, Ott, RA, Pangilinan, M, Parker, PD, Pease, EK, Pech, K, Phelps, P, Reichhart, L, Shutt, T, Silva, C, Solovov, VN, Sorensen, P, O׳Sullivan, K, Sumner, TJ, Szydagis, M, Taylor, D, Tennyson, B, Tiedt, DR, Tripathi, M, Uvarov, S, Verbus, JR, Walsh, N, Webb, R, White, JT, Witherell, MS, Wolfs, FLH, Woods, M, Zhang, C, and Collaboration, On behalf of the LUX

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Synchrotrons and Accelerators, Physical Sciences, Dark matter, WIMP, Liquid xenon, Time projection chamber, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Other Physical Sciences, Nuclear & Particles Physics, Nuclear and plasma physics
Abstract

© 2014 Elsevier B.V. The LUX (Large Underground Xenon) experiment aims at the direct detection of dark matter particles via their collisions with xenon nuclei. The 370. kg two-phase liquid xenon time projection chamber measures simultaneously the scintillation and ionization from interactions in the target. The ratio of these two signals provides very good discrimination between potential nuclear recoil and electronic recoil signals to search for WIMP-nucleon scattering. The LUX detector operates at the Sanford Underground Research Facility (Lead, South Dakota, USA) since February 2013. First results were presented in late 2013 setting the world's most stringent limits on WIMP-nucleon scattering cross-sections over a wide range of WIMP masses. A 300 day run beginning in 2014 will further improve the sensitivity and new calibration techniques will reduce systematics for the WIMP signal search.

Published
2015

5. Radiogenic and muon-induced backgrounds in the LUX dark matter detector

Author

Akerib, DS, Araújo, HM, Bai, X, Bailey, AJ, Balajthy, J, Bernard, E, Bernstein, A, Bradley, A, Byram, D, Cahn, SB, Carmona-Benitez, MC, Chan, C, Chapman, JJ, Chiller, AA, Chiller, C, Coffey, T, Currie, A, de Viveiros, L, Dobi, A, Dobson, J, Druszkiewicz, E, Edwards, B, Faham, CH, Fiorucci, S, Flores, C, Gaitskell, RJ, Gehman, VM, Ghag, C, Gibson, KR, Gilchriese, MGD, Hall, C, Hertel, SA, Horn, M, Huang, DQ, Ihm, M, Jacobsen, RG, Kazkaz, K, Knoche, R, Larsen, NA, Lee, C, Lindote, A, Lopes, MI, Malling, DC, Mannino, R, McKinsey, DN, Mei, D-M, Mock, J, Moongweluwan, M, Morad, J, Murphy, Nehrkorn, C, Nelson, H, Neves, F, Ott, RA, Pangilinan, M, Parker, PD, Pease, EK, Pech, K, Phelps, P, Reichhart, L, Shutt, T, Silva, C, Solovov, VN, Sorensen, P, O’Sullivan, K, Sumner, TJ, Szydagis, M, Taylor, D, Tennyson, B, Tiedt, DR, Tripathi, M, Uvarov, S, Verbus, JR, Walsh, N, Webb, R, White, JT, Witherell, MS, Wolfs, FLH, Woods, M, and Zhang, C

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, LUX, Dark matter, Radioactive background, Material screening, Simulation, astro-ph.IM, physics.ins-det, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, Astronomical sciences, Particle and high energy physics
Abstract

The Large Underground Xenon (LUX) dark matter experiment aims to detect rare low-energy interactions from Weakly Interacting Massive Particles (WIMPs). The radiogenic backgrounds in the LUX detector have been measured and compared with Monte Carlo simulation. Measurements of LUX high-energy data have provided direct constraints on all background sources contributing to the background model. The expected background rate from the background model for the 85.3 day WIMP search run is (2.6±0.2stat±0.4sys) ×10-3 events keVee-1kg-1day-1 in a 118 kg fiducial volume. The observed background rate is (3.6±0.4 stat)×10-3 events keVee-1kg-1day- 1, consistent with model projections. The expectation for the radiogenic background in a subsequent one-year run is presented. © 2014 Elsevier B.V. All rights reserved.

Published
2015

6. Radon-related Backgrounds in the LUX Dark Matter Search

Author

Bradley, A, Akerib, DS, Araújo, HM, Bai, X, Bailey, AJ, Balajthy, J, Bernard, E, Bernstein, A, Byram, D, Cahn, SB, Carmona-Benitez, MC, Chan, C, Chapman, JJ, Chiller, AA, Chiller, C, Coffey, T, Currie, A, de Viveiros, L, Dobi, A, Dobson, J, Druszkiewicz, E, Edwards, B, Faham, CH, Fiorucci, S, Flores, C, Gaitskell, RJ, Gehman, VM, Ghag, C, Gibson, KR, Gilchriese, MGD, Hall, C, Hertel, SA, Horn, M, Huang, DQ, Ihm, M, Jacobsen, RG, Kazkaz, K, Knoche, R, Larsen, NA, Lee, C, Lindote, A, Lopes, MI, Malling, DC, Mannino, R, McKinsey, DN, Mei, D-M, Mock, J, Moongweluwan, M, Morad, J, Murphy, A St J, Nehrkorn, C, Nelson, H, Neves, F, Ott, RA, Pangilinan, M, Parker, PD, Pease, EK, Pech, K, Phelps, P, Reichhart, L, Shutt, T, Silva, C, Solovov, VN, Sorensen, P, O'Sullivan, K, Sumner, TJ, Szydagis, M, Taylor, D, Tennyson, B, Tiedt, DR, Tripathi, M, Uvarov, S, Verbus, JR, Walsh, N, Webb, R, White, JT, Witherell, MS, Wolfs, FLH, Woods, M, and Zhang, C

Subjects
dark matter, liquid noble detectors, xenon, radon, background characterization
Abstract

The LUX detector is currently in operation at the Davis Campus at the 4850' level of the Sanford Underground Research Facility (SURF) in Lead, SD to directly search for WIMP dark matter. Knowing the type and rate of backgrounds is critical in a rare, low energy event search, and LUX was designed, constructed, and deployed to mitigate backgrounds, both internal and external. An important internal background are decays of radon and its daughters. These consist of alpha decays, which are easily tagged and are a tracer of certain backgrounds, and beta decays, some of which are not as readily tagged and present a background for the WIMP search. We report on studies of alpha decay and discuss implications for the WIMP search.

Published
2015

7. The LUX Experiment

Author

Akerib, DS, Araújo, HM, Bai, X, Bailey, AJ, Balajthy, J, Bernard, E, Bernstein, A, Bradley, A, Byram, D, Cahn, SB, Carmona-Benitez, MC, Chan, C, Chapman, JJ, Chiller, AA, Chiller, C, Coffey, T, Currie, A, de Viveiros, L, Dobi, A, Dobson, J, Druszkiewicz, E, Edwards, B, Faham, CH, Fiorucci, S, Flores, C, Gaitskell, RJ, Gehman, VM, Ghag, C, Gibson, KR, Gilchriese, MGD, Hall, C, Hertel, SA, Horn, M, Huang, DQ, Ihm, M, Jacobsen, RG, Kazkaz, K, Knoche, R, Larsen, NA, Lee, C, Lindote, A, Lopes, MI, Malling, DC, Mannino, R, McKinsey, DN, Mei, D-M, Mock, J, Moongweluwan, M, Morad, J, Murphy, A St J, Nehrkorn, C, Nelson, H, Neves, F, Ott, RA, Pangilinan, M, Parker, PD, Pease, EK, Pech, K, Phelps, P, Reichhart, L, Shutt, T, Silva, C, Solovov, VN, Sorensen, P, O'Sullivan, K, Sumner, TJ, Szydagis, M, Taylor, D, Tennyson, B, Tiedt, DR, Tripathi, M, Uvarov, S, Verbus, JR, Walsh, N, Webb, R, White, JT, Witherell, MS, Wolfs, FLH, Woods, M, and Zhang, C

Subjects
Liquid xenon detectors, Dark matter, WIMP, Direct detection
Abstract

We present the status and prospects of the LUX experiment, which employs approximately 300 kg of two-phase xenon to search for WIMP dark matter interactions. The LUX detector was commissioned at the surface laboratory of the Sanford Underground Research Facility in Lead, SD, between December 2011 and February 2012 and the detector has been operating underground since January, 2013. These proceedings review the results of the commissioning run as well as the status of underground data-taking through the summer of 2013.

Published
2015

8. First Results from the LUX Dark Matter Experiment at the Sanford Underground Research Facility

Author

Akerib, DS, Araújo, HM, Bai, X, Bailey, AJ, Balajthy, J, Bedikian, S, Bernard, E, Bernstein, A, Bolozdynya, A, Bradley, A, Byram, D, Cahn, SB, Carmona-Benitez, MC, Chan, C, Chapman, JJ, Chiller, AA, Chiller, C, Clark, K, Coffey, T, Currie, A, Curioni, A, Dazeley, S, de Viveiros, L, Dobi, A, Dobson, J, Dragowsky, EM, Druszkiewicz, E, Edwards, B, Faham, CH, Fiorucci, S, Flores, C, Gaitskell, RJ, Gehman, VM, Ghag, C, Gibson, KR, Gilchriese, MGD, Hall, C, Hanhardt, M, Hertel, SA, Horn, M, Huang, DQ, Ihm, M, Jacobsen, RG, Kastens, L, Kazkaz, K, Knoche, R, Kyre, S, Lander, R, Larsen, NA, Lee, C, Leonard, DS, Lesko, KT, Lindote, A, Lopes, MI, Lyashenko, A, Malling, DC, Mannino, R, McKinsey, DN, Mei, D-M, Mock, J, Moongweluwan, M, Morad, J, Morii, M, Murphy, A St J, Nehrkorn, C, Nelson, H, Neves, F, Nikkel, JA, Ott, RA, Pangilinan, M, Parker, PD, Pease, EK, Pech, K, Phelps, P, Reichhart, L, Shutt, T, Silva, C, Skulski, W, Sofka, CJ, Solovov, VN, Sorensen, P, Stiegler, T, O'Sullivan, K, Sumner, TJ, Svoboda, R, Sweany, M, Szydagis, M, Taylor, D, Tennyson, B, Tiedt, DR, Tripathi, M, Uvarov, S, Verbus, JR, Walsh, N, Webb, R, White, JT, White, D, Witherell, MS, Wlasenko, M, and Wolfs, FLH

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, LUX Collaboration, astro-ph.CO, astro-ph.IM, hep-ex, physics.ins-det, Mathematical Sciences, Engineering, General Physics, Mathematical sciences, Physical sciences
Abstract

The Large Underground Xenon (LUX) experiment is a dual-phase xenon time-projection chamber operating at the Sanford Underground Research Facility (Lead, South Dakota). The LUX cryostat was filled for the first time in the underground laboratory in February 2013. We report results of the first WIMP search data set, taken during the period from April to August 2013, presenting the analysis of 85.3 live days of data with a fiducial volume of 118 kg. A profile-likelihood analysis technique shows our data to be consistent with the background-only hypothesis, allowing 90% confidence limits to be set on spin-independent WIMP-nucleon elastic scattering with a minimum upper limit on the cross section of 7.6 × 10(-46) cm(2) at a WIMP mass of 33 GeV/c(2). We find that the LUX data are in disagreement with low-mass WIMP signal interpretations of the results from several recent direct detection experiments.

Published
2014

9. A Detailed Look at the First Results from the Large Underground Xenon (LUX) Dark Matter Experiment

Author

Szydagis, M, Akerib, DS, Araujo, HM, Bai, X, Bailey, AJ, Balajthy, J, Bernard, E, Bernstein, A, Bradley, A, Byram, D, Cahn, SB, Carmona-Benitez, MC, Chan, C, Chapman, JJ, Chiller, AA, Chiller, C, Coffey, T, Currie, A, Viveiros, L de, Dobi, A, Dobson, J, Druszkiewicz, E, Edwards, B, Faham, CH, Fiorucci, S, Flores, C, Gaitskell, RJ, Gehman, VM, Ghag, C, Gibson, KR, Gilchriese, MGD, Hall, C, Hertel, SA, Horn, M, Huang, DQ, Ihm, M, Jacobsen, RG, Kazkaz, K, Knoche, R, Larsen, NA, Lee, C, Lindote, A, Lopes, MI, Malling, DC, Mannino, R, McKinsey, DN, Mei, D-M, Mock, J, Moongweluwan, M, Morad, J, Murphy, A St J, Nehrkorn, C, Nelson, H, Neves, F, Ott, RA, Pangilinan, M, Parker, PD, Pease, EK, Pech, K, Phelps, P, Reichhart, L, Shutt, T, Silva, C, Solovov, VN, Sorensen, P, O'Sullivan, K, Sumner, T, Taylor, D, Tennyson, B, Tiedt, DR, Tripathi, M, Uvarov, S, Verbus, JR, Walsh, N, Webb, R, White, JT, Witherell, MS, Wolfs, FLH, Woods, M, and Zhang, C

Subjects
hep-ex, astro-ph.CO, astro-ph.IM, physics.ins-det
Abstract

LUX, the world's largest dual-phase xenon time-projection chamber, with afiducial target mass of 118 kg and 10,091 kg-days of exposure thus far, iscurrently the most sensitive direct dark matter search experiment. The initialnull-result limit on the spin-independent WIMP-nucleon scattering cross-sectionwas released in October 2013, with a primary scintillation threshold of 2 phe,roughly 3 keVnr for LUX. The detector has been deployed at the SanfordUnderground Research Facility (SURF) in Lead, South Dakota, and is the firstexperiment to achieve a limit on the WIMP cross-section lower than $10^{-45}$cm$^{2}$. Here we present a more in-depth discussion of the novel energy scaleemployed to better understand the nuclear recoil light and charge yields, andof the calibration sources, including the new internal tritium source. We foundthe LUX data to be in conflict with low-mass WIMP signal interpretations ofother results.

Published
2014

10. Direct search for dark matter with two-phase xenon detectors: Current status of LUX and plans for LZ

Author

Akerib, DS, Araújo, HM, Bai, X, Bailey, AJ, Balajthy, J, Bernard, E, Bernstein, A, Bradley, A, Byram, D, Cahn, SB, Carmona-Benitez, MC, Chan, C, Chapman, JJ, Chiller, AA, Chiller, C, Coffey, T, Currie, A, De Viveiros, L, Dobi, A, Dobson, J, Druszkiewicz, E, Edwards, B, Faham, CH, Fiorucci, S, Flores, C, Gaitskell, RJ, Gehman, VM, Ghag, C, Gibson, KR, Gilchriese, MGD, Hall, C, Hertel, SA, Horn, M, Huang, DQ, Ihm, M, Jacobsen, RG, Kazkaz, K, Knoche, R, Larsen, NA, Lee, C, Lenardo, B, Lesko, KT, Lindote, A, Lopes, MI, Malling, DC, Man-Nino, R, McKinsey, DN, Mei, DM, Mock, J, Moongweluwan, M, Morad, J, Murphy, ASJ, Nehrkorn, C, Nelson, H, Neves, F, Ott, RA, Pangilinan, M, Parker, PD, Pease, EK, Pech, K, Phelps, P, Reichhart, L, Shutt, T, Silva, C, Solovov, VN, Sorensen, P, O'Sullivan, K, Sumner, TJ, Szydagis, M, Tay-Lor, D, Tennyson, B, Tiedt, DR, Tripathi, M, Uvarov, S, Verbus, JR, Walsh, N, Webb, R, White, JT, Witherell, MS, Wolfs, FLH, Woods, M, and Zhang, C

Abstract

The search for dark matter reaches back generations and remains one of the most compelling endeavors in the hunt for physics beyond the Standard Model. Experiments attempting to directly detect WIMP dark matter have made re-markable progress in increasing sensitivity to elastic scattering of WIMPs on nuclei. The LUX experiment is a 370-kg, two-phase, xenon TPC currently running at SURF, 4850 feet below Lead, SD. LUX recently completed its first science run and was sensitive to spin independent WIMP scattering at cross sections below 10-45 cm2 for WIMP masses of approximately 20 to 80 GeV. Preparations for the final science run of LUX are currently underway, with final results expected in 2015. We will present results from and current status of the LUX experiment, as well as plans for a follow-on, multi-ton-scale xenon experiment at SURF.

Published
2014

11. Results from the LUX dark matter experiment

Author

Horn, M, Akerib, DS, Arau jo, HM, Bai, X, Bailey, AJ, Balajthy, J, Bernard, E, Bernstein, A, Bradley, A, Byram, D, Cahn, SB, Carmona-Benitez, MC, Chan, C, Chapman, JJ, Chiller, AA, Chiller, C, Currie, A, de Viveiros, L, Dobi, A, Dobson, J, Druszkiewicz, E, Edwards, B, Faham, CH, Fiorucci, S, Flores, C, Gaitskell, RJ, Gehman, VM, Ghag, C, Gibson, KR, Gilchriese, MGD, Hall, C, Hanhardt, M, Haselschwardt, S, Hertel, SA, Huang, DQ, Ihm, M, Jacobsen, RG, Kazkaz, K, Knoche, R, Larsen, NA, Lee, C, Lenardo, B, Lesko, KT, Lindote, A, Lopes, MI, Malling, DC, Mannino, R, McKinsey, DN, Mei, DM, Mock, J, Moongweluwan, M, Morad, J, Murphy, ASJ, Nehrkorn, C, Nelson, H, Neves, F, Ott, RA, Pangilinan, M, Parker, PD, Pease, EK, Pech, K, Phelps, P, Reichhart, L, Shutt, T, Silva, C, Solovov, VN, Sorensen, P, O'Sullivan, K, Sumner, TJ, Szydagis, M, Taylor, D, Tennyson, B, Tiedt, DR, Tripathi, M, Uvarov, S, Verbus, JR, Walsh, N, Webb, R, White, JT, Witherell, MS, Wolfs, FLH, Woods, M, and Zhang, C

Subjects
Dark matter, WIMP, Liquid xenon, Time projection chamber, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Other Physical Sciences
Abstract

© 2014 Elsevier B.V. The LUX (Large Underground Xenon) experiment aims at the direct detection of dark matter particles via their collisions with xenon nuclei. The 370. kg two-phase liquid xenon time projection chamber measures simultaneously the scintillation and ionization from interactions in the target. The ratio of these two signals provides very good discrimination between potential nuclear recoil and electronic recoil signals to search for WIMP-nucleon scattering. The LUX detector operates at the Sanford Underground Research Facility (Lead, South Dakota, USA) since February 2013. First results were presented in late 2013 setting the world's most stringent limits on WIMP-nucleon scattering cross-sections over a wide range of WIMP masses. A 300 day run beginning in 2014 will further improve the sensitivity and new calibration techniques will reduce systematics for the WIMP signal search.

Published
2014

12. Technical results from the surface run of the LUX dark matter experiment

Author

Akerib, DS, Bai, X, Bernard, E, Bernstein, A, Bradley, A, Byram, D, Cahn, SB, Carmona-Benitez, MC, Chapman, JJ, Coffey, T, Dobi, A, Dragowsky, E, Druszkiewicz, E, Edwards, B, Faham, CH, Fiorucci, S, Gaitskell, RJ, Gibson, KR, Gilchriese, M, Hall, C, Hanhardt, M, Ihm, M, Jacobsen, RG, Kastens, L, Kazkaz, K, Knoche, R, Larsen, N, Lee, C, Lesko, KT, Lindote, A, Lopes, MI, Lyashenko, A, Malling, DC, Mannino, R, McKinsey, DN, Mei, D, Mock, J, Moongweluwan, M, Morii, M, Nelson, H, Neves, F, Nikkel, JA, Pangilinan, M, Pech, K, Phelps, P, Rodionov, A, Shutt, T, Silva, C, Skulski, W, Solovov, VN, Sorensen, P, Stiegler, T, Sweany, M, Szydagis, M, Taylor, D, Tripathi, M, Uvarov, S, Verbus, JR, de Viveiros, L, Walsh, N, Webb, R, White, JT, Wlasenko, M, Wolfs, FLH, Woods, M, and Zhang, C

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, Liquid xenon detectors, Dark matter, WIMP, Direct detection, astro-ph.IM, hep-ex, hep-ph, physics.ins-det, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, Astronomical sciences, Particle and high energy physics
Abstract

We present the results of the three-month above-ground commissioning run of the Large Underground Xenon (LUX) experiment at the Sanford Underground Research Facility located in Lead, South Dakota, USA. LUX is a 370 kg liquid xenon detector that will search for cold dark matter in the form of Weakly Interacting Massive Particles (WIMPs). The commissioning run, conducted with the detector immersed in a water tank, validated the integration of the various sub-systems in preparation for the underground deployment. Using the data collected, we report excellent light collection properties, achieving 8.4 photoelectrons per keV for 662 keV electron recoils without an applied electric field, measured in the center of the WIMP target. We also find good energy and position resolution in relatively high-energy interactions from a variety of internal and external sources. Finally, we have used the commissioning data to tune the optical properties of our simulation and report updated sensitivity projections for spin-independent WIMP-nucleon scattering. © 2013 Elsevier B.V. All rights reserved.

Published
2013

13. The Large Underground Xenon (LUX) experiment

Author

Akerib, DS, Bai, X, Bedikian, S, Bernard, E, Bernstein, A, Bolozdynya, A, Bradley, A, Byram, D, Cahn, SB, Camp, C, Carmona-Benitez, MC, Carr, D, Chapman, JJ, Chiller, A, Chiller, C, Clark, K, Classen, T, Coffey, T, Curioni, A, Dahl, E, Dazeley, S, de Viveiros, L, Dobi, A, Dragowsky, E, Druszkiewicz, E, Edwards, B, Faham, CH, Fiorucci, S, Gaitskell, RJ, Gibson, KR, Gilchriese, M, Hall, C, Hanhardt, M, Holbrook, B, Ihm, M, Jacobsen, RG, Kastens, L, Kazkaz, K, Knoche, R, Kyre, S, Kwong, J, Lander, R, Larsen, NA, Lee, C, Leonard, DS, Lesko, KT, Lindote, A, Lopes, MI, Lyashenko, A, Malling, DC, Mannino, R, Marquez, Z, McKinsey, DN, Mei, D-M, Mock, J, Moongweluwan, M, Morii, M, Nelson, H, Neves, F, Nikkel, JA, Pangilinan, M, Parker, PD, Pease, EK, Pech, K, Phelps, P, Rodionov, A, Roberts, P, Shei, A, Shutt, T, Silva, C, Skulski, W, Solovov, VN, Sofka, CJ, Sorensen, P, Spaans, J, Stiegler, T, Stolp, D, Svoboda, R, Sweany, M, Szydagis, M, Taylor, D, Thomson, J, Tripathi, M, Uvarov, S, Verbus, JR, Walsh, N, Webb, R, White, D, White, JT, Whitis, TJ, Wlasenko, M, Wolfs, FLH, Woods, M, and Zhang, C

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, Dark matter detectors, Liquid xenon, physics.ins-det, hep-ex, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Other Physical Sciences, Nuclear & Particles Physics, Nuclear and plasma physics
Abstract

The Large Underground Xenon (LUX) collaboration has designed and constructed a dual-phase xenon detector, in order to conduct a search for Weakly Interacting Massive Particles (WIMPs), a leading dark matter candidate. The goal of the LUX detector is to clearly detect (or exclude) WIMPS with a spin independent cross-section per nucleon of 2×10-46cm2, equivalent to ∼1event/100kg/month in the inner 100-kg fiducial volume (FV) of the 370-kg detector. The overall background goals are set to have

Published
2013

14. A Detailed Look at the First Results from the Large Underground Xenon (LUX) Dark Matter Experiment

Author

Szydagis, M, Akerib, DS, Araujo, HM, Bai, X, Bailey, AJ, Balajthy, J, Bernard, E, Bernstein, A, Bradley, A, Byram, D, Cahn, SB, Carmona-Benitez, MC, Chan, C, Chapman, JJ, Chiller, AA, Chiller, C, Coffey, T, Currie, A, Viveiros, L de, Dobi, A, Dobson, J, Druszkiewicz, E, Edwards, B, Faham, CH, Fiorucci, S, Flores, C, Gaitskell, RJ, Gehman, VM, Ghag, C, Gibson, KR, Gilchriese, MGD, Hall, C, Hertel, SA, Horn, M, Huang, DQ, Ihm, M, Jacobsen, RG, Kazkaz, K, Knoche, R, Larsen, NA, Lee, C, Lindote, A, Lopes, MI, Malling, DC, Mannino, R, McKinsey, DN, Mei, D-M, Mock, J, Moongweluwan, M, Morad, J, Murphy, A St J, Nehrkorn, C, Nelson, H, Neves, F, Ott, RA, Pangilinan, M, Parker, PD, Pease, EK, Pech, K, Phelps, P, Reichhart, L, Shutt, T, Silva, C, Solovov, VN, Sorensen, P, O'Sullivan, K, Sumner, T, Taylor, D, Tennyson, B, Tiedt, DR, Tripathi, M, Uvarov, S, Verbus, JR, Walsh, N, Webb, R, White, JT, Witherell, MS, Wolfs, FLH, Woods, M, and Zhang, C

Subjects
High Energy Physics - Experiment (hep-ex), Physics - Instrumentation and Detectors, Cosmology and Nongalactic Astrophysics (astro-ph.CO), hep-ex, astro-ph.CO, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), physics.ins-det, High Energy Physics - Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics, astro-ph.IM
Abstract

LUX, the world's largest dual-phase xenon time-projection chamber, with a fiducial target mass of 118 kg and 10,091 kg-days of exposure thus far, is currently the most sensitive direct dark matter search experiment. The initial null-result limit on the spin-independent WIMP-nucleon scattering cross-section was released in October 2013, with a primary scintillation threshold of 2 phe, roughly 3 keVnr for LUX. The detector has been deployed at the Sanford Underground Research Facility (SURF) in Lead, South Dakota, and is the first experiment to achieve a limit on the WIMP cross-section lower than $10^{-45}$ cm$^{2}$. Here we present a more in-depth discussion of the novel energy scale employed to better understand the nuclear recoil light and charge yields, and of the calibration sources, including the new internal tritium source. We found the LUX data to be in conflict with low-mass WIMP signal interpretations of other results., Comment: 16 pages, 3 figures, to appear in the proceedings of The 10th International Symposium on Cosmology and Particle Astrophysics (CosPA2013); fixed author list and added info on new calibration

Published
2018

15. Direct search for dark matter with two-phase xenon detectors: Current status of LUX and plans for LZ

Author

Akerib, D. S., Araújo, H. M., Bai, X., Bailey, A. J., Balajthy, J., Bernard, E., Bernstein, A., Bradley, A., Byram, D., Cahn, S. B., Carmona-Benitez, M. C., Chan, C., Chapman, J. J., Chiller, A. A., Chiller, C., Coffey, T., Currie, A., Viveiros, L., Dobi, A., Dobson, J., Druszkiewicz, E., Edwards, B., Faham, C. H., Fiorucci, S., Flores, C., Gaitskell, R. J., Gehman, V. M., Ghag, C., Gibson, K. R., Gilchriese, M. G. D., Hall, C., Hertel, S. A., Horn, M., Huang, D. Q., Ihm, M., Jacobsen, R. G., Kazkaz, K., Knoche, R., Larsen, N. A., Lee, C., Lenardo, B., Lesko, K. T., Lindote, A., Lopes, M. I., Malling, D. C., Man-Nino, R., Mckinsey, D. N., Mei, D. -M, Mock, J., Moongweluwan, M., Morad, J., Murphy, A. St J., Nehrkorn, C., Nelson, H., Neves, F., Ott, R. A., Pangilinan, M., Parker, P. D., Pease, E. K., Pech, K., Phelps, P., Reichhart, L., Shutt, T., Claudio Silva, Solovov, V. N., Sorensen, P., O Sullivan, K., Sumner, T. J., Szydagis, M., Tay-Lor, D., Tennyson, B., Tiedt, D. R., Tripathi, M., Uvarov, S., Verbus, J. R., Walsh, N., Webb, R., White, J. T., Witherell, M. S., Wolfs, F. L. H., Woods, M., and Zhang, C.

Abstract

The search for dark matter reaches back generations and remains one of the most compelling endeavors in the hunt for physics beyond the Standard Model. Experiments attempting to directly detect WIMP dark matter have made re-markable progress in increasing sensitivity to elastic scattering of WIMPs on nuclei. The LUX experiment is a 370-kg, two-phase, xenon TPC currently running at SURF, 4850 feet below Lead, SD. LUX recently completed its first science run and was sensitive to spin independent WIMP scattering at cross sections below 10-45 cm2 for WIMP masses of approximately 20 to 80 GeV. Preparations for the final science run of LUX are currently underway, with final results expected in 2015. We will present results from and current status of the LUX experiment, as well as plans for a follow-on, multi-ton-scale xenon experiment at SURF.

Published
2014

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