Search for Event Rate Modulation in XENON100 Electronic Recoil Data

Journal
Date Issued
2015
Author(s)
Aprile, E.
•
Aalbers, J.
•
Agostini, F.
•
Alfonsi, M.
•
Anthony, M.
•
Arazi, L.
•
Arisaka, K.
•
Arneodo, F.
•
Balan, C.
•
Barrow, P.
•
Baudis, L.
•
Bauermeister, B.
•
Breur, P. A.
•
Brown, A.
•
Brown, E.
•
Bruenner, S.
•
•
Budnik, R.
•
Bütikofer, L.
•
Cardoso, J. M. R.
•
Cervantes, M.
•
Coderre, D.
•
Colijn, A. P.
•
Contreras, H.
•
Cussonneau, J. P.
•
Decowski, M. P.
•
de Perio, P.
•
di Giovanni, A.
•
Duchovni, E.
•
Fattori, S.
•
Ferella, A. D.
•
Fieguth, A.
•
•
Gao, F.
•
Garbini, M.
•
Geis, C.
•
Goetzke, L. W.
•
Grignon, C.
•
Gross, E.
•
Hampel, W.
•
Hasterok, C.
•
Itay, R.
•
Kaether, F.
•
Kaminsky, B.
•
Kessler, G.
•
Kish, A.
•
Landsman, H.
•
Lang, R. F.
•
Le Calloch, M.
•
Lellouch, D.
•
Levinson, L.
•
Levy, C.
•
Lindemann, S.
•
Lindner, M.
•
Lopes, J. A. M.
•
Lyashenko, A.
•
Macmullin, S.
•
Marrodán Undagoitia, T.
•
Masbou, J.
•
Massoli, F. V.
•
Mayani, D.
•
Melgarejo Fernandez, A. J.
•
Meng, Y.
•
Messina, M.
•
Micheneau, K.
•
Miguez, B.
•
•
Murra, M.
•
Naganoma, J.
•
Ni, K.
•
Oberlack, U.
•
Orrigo, S. E. A.
•
Pakarha, P.
•
Persiani, R.
•
Piastra, F.
•
Pienaar, J.
•
Plante, G.
•
Priel, N.
•
Rauch, L.
•
Reichard, S.
•
Reuter, C.
•
Rizzo, A.
•
Rosendahl, S.
•
Dos Santos, J. M. F.
•
Sartorelli, G.
•
Schindler, S.
•
Schreiner, J.
•
Schumann, M.
•
Scotto Lavina, L.
•
Selvi, M.
•
Shagin, P.
•
Simgen, H.
•
Teymourian, A.
•
Thers, D.
•
Tiseni, A.
•
•
Tunnell, C.
•
Wall, R.
•
Wang, H.
•
Weber, M.
•
Weinheimer, C.
•
Zhang, Y.
•
Xenon Collaboration
DOI
Description
We gratefully acknowledge support from the NSF, DOE, SNF, FCT, Region des Pays de la Loire, STCSM, NSFC, DFG, MPG, Stichting FOM, the Weizmann Institute of Science, I-CORE, EMG, TN Invisibles (Marie Curie Actions, PITN-GA-2011-289442), and INFN. We are grateful to LNGS for hosting and supporting the XENON project.
Abstract
We have searched for periodic variations of the electronic recoil event rate in the (2-6) keV energy range recorded between February 2011 and March 2012 with the XENON100 detector, adding up to 224.6 live days in total. Following a detailed study to establish the stability of the detector and its background contributions during this run, we performed an unbinned profile likelihood analysis to identify any periodicity up to 500 days. We find a global significance of less than 1 σ for all periods, suggesting no statistically significant modulation in the data. While the local significance for an annual modulation is 2.8 σ , the analysis of a multiple-scatter control sample and the phase of the modulation disfavor a dark matter interpretation. The DAMA/LIBRA annual modulation interpreted as a dark matter signature with axial-vector coupling of weakly interacting massive particles to electrons is excluded at 4.8 σ .

Volume
115
Issue
9
Start page
091302
Uri
Url
Issn Identifier
0031-9007
Ads BibCode
2015PhRvL.115i1302A
Rights
open.access
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