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1. Dark matter results from 225 live days of XENON100 data

Author

W. Hampel, M. Garbini, J.M.F. dos Santos, J. Lamblin, K. Bokeloh, Jean-Pierre Cussonneau, S. Rosendahl, Ethan Brown, M. Selvi, Sebastian Lindemann, Eilam Gross, Boris Bauermeister, P. Beltrame, Jochen Schreiner, Luke Goetzke, Hardy Simgen, A. D. Ferella, G. Sartorelli, A. Teymourian, F. Arneodo, Laura Baudis, H. Landsman, M. Le Calloch, J. A. M. Lopes, S. Fattori, Y. Meng, O. Vitells, A. Rizzo, David B. Cline, S. E. A. Orrigo, A. Kish, João Cardoso, K. Arisaka, R. Persiani, L. Scotto Lavina, C. Grignon, K. L. Giboni, H. Contreras, F. Gao, A. Behrens, E. Pantic, C. Balan, D. Thers, Ehud Duchovni, W. T. Chen, K. E. Lim, M. Weber, Auke-Pieter Colijn, R. F. Lang, Uwe Oberlack, Elena Aprile, Kaixuan Ni, E. Nativ, T. Marrodán Undagoitia, G. Plante, B. Choi, Ch. Weinheimer, A. J. Melgarejo Fernandez, P. R. Scovell, C. Ghag, F. V. Massoli, Qing Lin, M. Alfonsi, K. Lung, A. Molinario, W. Fulgione, Giacomo Bruno, C. Levy, N. Priel, Hui Wang, Florian Kaether, M. P. Decowski, Manfred Lindner, Marc Schumann, P. Shagin, Ran Budnik, Astroparticle Physics (IHEF, IoP, FNWI), E. Aprile, M. Alfonsi, K. Arisaka, F. Arneodo, C. Balan, L. Baudi, B. Bauermeister, A. Behren, P. Beltrame, K. Bokeloh, E. Brown, G. Bruno, R. Budnik, J. M. R. Cardoso, W.-T. Chen, B. Choi, D. Cline, A. P. Colijn, H. Contrera, J. P. Cussonneau, M. P. Decowski, E. Duchovni, S. Fattori, A. D. Ferella, W. Fulgione, F. Gao, M. Garbini, C. Ghag, K.-L. Giboni, L. W. Goetzke, C. Grignon, E. Gro, W. Hampel, F. Kaether, A. Kish, J. Lamblin, H. Landsman, R. F. Lang, M. Le Calloch, C. Levy, K. E. Lim, Q. Lin, S. Lindemann, M. Lindner, J. A. M. Lope, K. Lung, T. Marrodán Undagoitia, F. V. Massoli, A. J. Melgarejo Fernandez, Y. Meng, A. Molinario, E. Nativ, K. Ni, U. Oberlack, S. E. A. Orrigo, E. Pantic, R. Persiani, G. Plante, N. Priel, A. Rizzo, S. Rosendahl, J. M. F. dos Santo, G. Sartorelli, J. Schreiner, M. Schumann, L. Scotto Lavina, P. R. Scovell, M. Selvi, P. Shagin, H. Simgen, A. Teymourian, D. Ther, O. Vitell, H. Wang, M. Weber, C. Weinheimer, Laboratoire SUBATECH Nantes (SUBATECH), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), and XENON100

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Physics - Instrumentation and Detectors, Large Underground Xenon experiment, Dark matter, FOS: Physical sciences, General Physics and Astronomy, WIMP Argon Programme, 01 natural sciences, 7. Clean energy, Particle detector, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), WIMP, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Liquid Xenon, Physics, Range (particle radiation), 010308 nuclear & particles physics, DARK MATTER, Instrumentation and Detectors (physics.ins-det), High Energy Physics - Phenomenology, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], DAMA/NaI, TPC, PandaX, Direct search for Dark Matter, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We report on a search for particle dark matter with the XENON100 experiment, operated at the Laboratori Nazionali del Gran Sasso (LNGS) for 13 months during 2011 and 2012. XENON100 features an ultra-low electromagnetic background of (5.3 \pm 0.6) \times 10^-3 events (kg day keVee)^-1 in the energy region of interest. A blind analysis of 224.6 live days \times 34 kg exposure has yielded no evidence for dark matter interactions. The two candidate events observed in the pre-defined nuclear recoil energy range of 6.6-30.5 keVnr are consistent with the background expectation of (1.0 \pm 0.2) events. A Profile Likelihood analysis using a 6.6-43.3 keVnr energy range sets the most stringent limit on the spin-independent elastic WIMP-nucleon scattering cross section for WIMP masses above 8 GeV/c^2, with a minimum of 2 \times 10^-45 cm^2 at 55 GeV/c^2 and 90% confidence level., 6 pages, 5 figures. Matches version accepted by PRL. Includes limits up to 10 TeV/c^2, published as supplementary material: http://prl.aps.org/supplemental/PRL/v109/i18/e181301 Please cite high mass limits as "Phys. Rev. Lett. 109, 181301 (2012), online supplementary material."

Published
2012
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2. Dark matter results from 225 live days of XENON100 data.

Author

Aprile E, Alfonsi M, Arisaka K, Arneodo F, Balan C, Baudis L, Bauermeister B, Behrens A, Beltrame P, Bokeloh K, Brown E, Bruno G, Budnik R, Cardoso JM, Chen WT, Choi B, Cline D, Colijn AP, Contreras H, Cussonneau JP, Decowski MP, Duchovni E, Fattori S, Ferella AD, Fulgione W, Gao F, Garbini M, Ghag C, Giboni KL, Goetzke LW, Grignon C, Gross E, Hampel W, Kaether F, Kish A, Lamblin J, Landsman H, Lang RF, Le Calloch M, Levy C, Lim KE, Lin Q, Lindemann S, Lindner M, Lopes JA, Lung K, Marrodán Undagoitia T, Massoli FV, Melgarejo Fernandez AJ, Meng Y, Molinario A, Nativ E, Ni K, Oberlack U, Orrigo SE, Pantic E, Persiani R, Plante G, Priel N, Rizzo A, Rosendahl S, dos Santos JM, Sartorelli G, Schreiner J, Schumann M, Scotto Lavina L, Scovell PR, Selvi M, Shagin P, Simgen H, Teymourian A, Thers D, Vitells O, Wang H, Weber M, and Weinheimer C

Abstract

We report on a search for particle dark matter with the XENON100 experiment, operated at the Laboratori Nazionali del Gran Sasso for 13 months during 2011 and 2012. XENON100 features an ultralow electromagnetic background of (5.3 ± 0.6) × 10(-3) events/(keV(ee) × kg × day) in the energy region of interest. A blind analysis of 224.6 live days × 34 kg exposure has yielded no evidence for dark matter interactions. The two candidate events observed in the predefined nuclear recoil energy range of 6.6-30.5 keV(nr) are consistent with the background expectation of (1.0 ± 0.2) events. A profile likelihood analysis using a 6.6-43.3 keV(nr) energy range sets the most stringent limit on the spin-independent elastic weakly interacting massive particle-nucleon scattering cross section for weakly interacting massive particle masses above 8 GeV/c(2), with a minimum of 2 × 10(-45) cm(2) at 55 GeV/c(2) and 90% confidence level.

Published
2012
Full Text
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