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  • 1. Aprile, E.
    et al.
    Aalbers, J.
    Agostini, F.
    Alfonsi, M.
    Althueser, L.
    Amaro, F. D.
    Anthony, M.
    Arneodo, F.
    Baudis, L.
    Bauermeister, Boris
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Benabderrahmane, M. L.
    Berger, T.
    Breur, P. A.
    Brown, A.
    Brown, A.
    Brown, E.
    Bruenner, S.
    Bruno, G.
    Budnik, R.
    Capelli, C.
    Cardoso, J. M. R.
    Cichon, D.
    Coderre, D.
    Colijn, A. P.
    Conrad, Jan
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Cussonneau, J. P.
    Decowski, M. P.
    de Perio, P.
    Di Gangi, P.
    Di Giovanni, A.
    Diglio, S.
    Elykov, A.
    Eurin, G.
    Fei, J.
    Ferella, Alfredo D.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Fieguth, A.
    Fulgione, W.
    Rosso, A. Gallo
    Galloway, M.
    Gao, F.
    Garbini, M.
    Geis, C.
    Grandi, L.
    Greene, Z.
    Qiu, H.
    Hasterok, C.
    Hogenbirk, E.
    Howlett, J.
    Itay, R.
    Joerg, F.
    Kaminsky, B.
    Kazama, S.
    Kish, A.
    Koltman, G.
    Landsman, H.
    Lang, R. F.
    Levinson, L.
    Lin, Q.
    Lindemann, S.
    Lindner, M.
    Lombardi, F.
    Lopes, J. A. M.
    Mahlstedt, Jörn
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Manfredini, A.
    Undagoitia, T. Marrodan
    Masbou, J.
    Masson, D.
    Messina, M.
    Micheneau, K.
    Miller, K.
    Molinario, A.
    Morå, Knut
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Murra, M.
    Naganoma, J.
    Ni, K.
    Oberlack, U.
    Pelssers, Bart
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Piastra, F.
    Pienaar, J.
    Pizzella, V.
    Plante, G.
    Podviianiuk, R.
    Priel, N.
    Garcia, D. Ramirez
    Rauch, L.
    Reichard, S.
    Reuter, C.
    Riedel, B.
    Rizzo, A.
    Rocchetti, A.
    Rupp, N.
    dos Santos, J. M. F.
    Sartorelli, G.
    Scheibelhut, M.
    Schindler, S.
    Schreiner, J.
    Schulte, D.
    Schumann, M.
    Lavina, L. Scotto
    Selvi, M.
    Shagin, P.
    Shockley, E.
    Silva, M.
    Simgen, H.
    Thers, D.
    Toschi, F.
    Trinchero, G.
    Tunnell, C.
    Upole, N.
    Vargas, M.
    Wack, O.
    Wang, H.
    Wang, Z.
    Wei, Y.
    Weinheimer, C.
    Wittweg, C.
    Wulf, J.
    Ye, J.
    Zhang, Y.
    Zhu, T.
    Dark Matter Search Results from a One Ton-Year Exposure of XENON1T2018In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 121, no 11, article id 111302Article in journal (Refereed)
    Abstract [en]

    We report on a search for weakly interacting massive particles (WIMPs) using 278.8 days of data collected with the XENON1T experiment at LNGS. XENON1T utilizes a liquid xenon time projection chamber with a fiducial mass of (1.30 +/- 0.01) ton, resulting in a 1.0 ton yr exposure. The energy region of interest, [1.4; 10.6] keV(ee) ([4.9; 40.9] keV(nr)), exhibits an ultralow electron recoil background rate of [82(-3)(+5) (syst) +/- 3 stat)] events/ton yr keV(ee)). No significant excess over background is found, and a profile likelihood analysis parametrized in spatial and energy dimensions excludes new parameter space for the WIMP-nucleon spin-independent elastic scatter cross section for WIMP masses above 6 GeV/c(2), with a minimum of 4.1 x 10(-47) cm(2) at 30 GeV/c(2) and a 90% confidence level.

  • 2. Aprile, E.
    et al.
    Aalbers, Jelle
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). Nikhef and the University of Amsterdam, Netherlands.
    Agostini, F.
    Alfonsi, M.
    Althueser, L.
    Amaro, F. D.
    Antochi, Vasile Cristian
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Arneodo, F.
    Barge, Derek
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Baudis, L.
    Bauermeister, Boris
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Bellagamba, L.
    Benabderrahmane, M. L.
    Berger, T.
    Breur, P. A.
    Brown, A.
    Brown, E.
    Bruenner, S.
    Bruno, G.
    Budnik, R.
    Buetikofer, L.
    Capelli, C.
    Cardoso, J. M. R.
    Cichon, D.
    Coderre, D.
    Colijn, A. P.
    Conrad, Jan
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Cussonneau, J. P.
    Decowski, M. P.
    de Perio, P.
    Di Gangi, P.
    Di Giovanni, A.
    Diglio, S.
    Elykov, A.
    Eurin, G.
    Fei, J.
    Ferella, Alfredo D.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Fieguth, A.
    Fulgione, W.
    Gaemers, P.
    Rosso, A. Gallo
    Galloway, M.
    Gao, F.
    Garbini, M.
    Grandi, L.
    Greene, Z.
    Hasterok, C.
    Hogenbirk, E.
    Howlett, J.
    Iacovacci, M.
    Itay, R.
    Joerg, F.
    Kazama, S.
    Kish, A.
    Kobayashi, M.
    Koltman, G.
    Kopec, A.
    Landsman, H.
    Lang, R. F.
    Levinson, L.
    Lin, Q.
    Lindemann, S.
    Lindner, M.
    Lombardi, F.
    Lopes, J. A. M.
    Fune, E. Lopez
    Macolino, C.
    Mahlstedt, Jörn
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Manfredini, A.
    Marignetti, F.
    Undagoitia, T. Marrodan
    Masbou, J.
    Masson, D.
    Mastroianni, S.
    Messina, M.
    Micheneau, K.
    Miller, K.
    Molinario, A.
    Morå, Knut
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Mosbacher, Y.
    Murra, M.
    Naganoma, J.
    Ni, K.
    Oberlack, U.
    Odgers, K.
    Pelssers, Bart
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Peres, R.
    Piastra, F.
    Pienaar, J.
    Pizzella, V
    Plante, G.
    Podviianiuk, R.
    Qiu, H.
    Garcia, D. Ramirez
    Reichard, M. S.
    Riedel, B.
    Rocchetti, A.
    Rupp, N.
    dos Santos, J. M. F.
    Sartorelli, G.
    Sarcevic, N.
    Scheibelhut, M.
    Schindler, S.
    Schreiner, J.
    Schulte, D.
    Schumann, M.
    Lavina, L. Scotto
    Selvi, M.
    Shagin, P.
    Shockley, E.
    Silva, M.
    Simgen, H.
    Therreau, C.
    Thers, D.
    Toschi, F.
    Trinchero, G.
    Tunnell, C. D.
    Upole, N.
    Vargas, M.
    Volta, G.
    Wack, O.
    Wang, H.
    Wei, Y.
    Weinheimer, C.
    Wenz, D.
    Wittweg, C.
    Wulf, J.
    Ye, J.
    Zhang, Y.
    Zhu, T.
    Zopounidis, J. P.
    Pieracci, M.
    Tintori, C.
    The XENON1T data acquisition system2019In: Journal of Instrumentation, ISSN 1748-0221, E-ISSN 1748-0221, Vol. 14, article id P07016Article in journal (Refereed)
    Abstract [en]

    The XENON1T liquid xenon time projection chamber is the most sensitive detector built to date for the measurement of direct interactions of weakly interacting massive particles with normal matter. The data acquisition system (DAQ) is constructed from commercial, open source, and custom components to digitize signals from the detector and store them for later analysis. The system achieves an extremely low signal threshold by triggering each channel independently, achieving a single photoelectron acceptance of (93 +/- 3)%, and deferring the global trigger to a later, software stage. The event identification is based on MongoDB database queries and has over 98% efficiency at recognizing interactions at the analysis threshold in the center of the target. A readout bandwidth over 300 MB/s is reached in calibration modes and is further expandable via parallelization. This DAQ system was successfully used during three years of operation of XENON1T.

  • 3. Aprile, E.
    et al.
    Aalbers, Jelle
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). Nikhef and the University of Amsterdam, Netherlands.
    Agostini, F.
    Alfonsi, M.
    Althueser, L.
    Amaro, F. D.
    Antochi, Vasile Cristian
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Arneodo, F.
    Baudis, L.
    Bauermeister, Boris
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Benabderrahmane, M. L.
    Berger, T.
    Breur, P. A.
    Brown, A.
    Brown, E.
    Bruenner, S.
    Bruno, G.
    Budnik, R.
    Capelli, C.
    Cardoso, J. M. R.
    Cichon, D.
    Coderre, D.
    Colijn, A. P.
    Conrad, Jan
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Cussonneau, J. P.
    Decowski, M. P.
    de Perio, P.
    Di Gangi, P.
    Di Giovanni, A.
    Diglio, S.
    Elykov, A.
    Eurin, G.
    Fei, J.
    Ferella, Alfredo D.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Fieguth, A.
    Fulgione, W.
    Rosso, A. Gallo
    Galloway, M.
    Gao, F.
    Garbini, M.
    Grandi, L.
    Greene, Z.
    Hasterok, C.
    Hogenbirk, E.
    Howlett, J.
    Iacovacci, M.
    Itay, R.
    Joerg, F.
    Kazama, S.
    Kish, A.
    Koltman, G.
    Kopec, A.
    Landsman, H.
    Lang, R. F.
    Levinson, L.
    Lin, Q.
    Lindemann, S.
    Lindner, M.
    Lombardi, F.
    Lopes, J. A. M.
    Fune, E. Lopez
    Macolino, C.
    Mahlstedt, Jörn
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Manfredini, A.
    Marignetti, F.
    Undagoitia, T. Marrodan
    Masbou, J.
    Masson, D.
    Mastroianni, S.
    Messina, M.
    Micheneau, K.
    Miller, K.
    Molinario, A.
    Morå, Knut
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Mosbacher, Y.
    Murra, M.
    Naganoma, J.
    Ni, K.
    Oberlack, U.
    Odgers, K.
    Pelssers, Bart
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Peres, R.
    Piastra, F.
    Pienaar, J.
    Pizzella, V
    Plante, G.
    Podviianiuk, R.
    Qiu, H.
    Garcia, D. Ramirez
    Reichard, S.
    Riedel, B.
    Rizzo, A.
    Rocchetti, A.
    Rupp, N.
    dos Santos, J. M. F.
    Sartorelli, G.
    Sarcevic, N.
    Scheibelhut, M.
    Schindler, S.
    Schreiner, J.
    Schulte, D.
    Schumann, M.
    Lavina, L. Scotto
    Selvi, M.
    Shagin, P.
    Shockley, E.
    Silva, M.
    Simgen, H.
    Therreau, C.
    Thers, D.
    Toschi, F.
    Trinchero, G.
    Tunnell, C.
    Upole, N.
    Vargas, M.
    Wack, O.
    Wang, H.
    Wang, Z.
    Wei, Y.
    Weinheimer, C.
    Wenz, D.
    Wittweg, C.
    Wulf, J.
    Ye, J.
    Zhang, Y.
    Zhu, T.
    Zopounidis, J. P.
    XENON1T dark matter data analysis: Signal and background models and statistical inference2019In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 99, no 11, article id 112009Article in journal (Refereed)
    Abstract [en]

    The XENON1T experiment searches for dark matter particles through their scattering off xenon atoms in a 2 metric ton liquid xenon target. The detector is a dual-phase time projection chamber, which measures simultaneously the scintillation and ionization signals produced by interactions in target volume, to reconstruct energy and position, as well as the type of the interaction. The background rate in the central volume of XENON1T detector is the lowest achieved so far with a liquid xenon-based direct detection experiment. In this work we describe the response model of the detector, the background and signal models, and the statistical inference procedures used in the dark matter searches with a 1 metric ton x year exposure of XENON1T data, that leads to the best limit to date on WIMP-nucleon spin-independent elastic scatter cross section for WIMP masses above 6 GeV/c(2).

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