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.; Bruno, G.; Budnik, R.; Bütikofer, Lukas; Cardoso, J. M. R.; ... (2015). Search for Event Rate Modulation in XENON100 Electronic Recoil Data. Physical review letters, 115(9) American Physical Society 10.1103/PhysRevLett.115.091302
|
Text
1507.pdf - Accepted Version Available under License Publisher holds Copyright. Download (835kB) | Preview |
|
Text
PhysRevLett.115.pdf - Published Version Restricted to registered users only Available under License Publisher holds Copyright. Download (503kB) |
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 un-binned profile likelihood analysis to identify any periodicity up to 500 days. We find a global significance of less than 1 sigma for all periods suggesting no statistically significant modulation in the data. While the local significance for an annual modulation is 2.8 sigma, 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 WIMPs to electrons is excluded at 4.8 sigma.
Item Type: |
Journal Article (Original Article) |
---|---|
Division/Institute: |
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) 08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) |
UniBE Contributor: |
Bütikofer, Lukas (A), Coderre, Daniel, Kaminsky, Jan Basho, Schumann, Marc |
Subjects: |
500 Science > 530 Physics |
ISSN: |
0031-9007 |
Publisher: |
American Physical Society |
Language: |
English |
Submitter: |
Marc Schumann |
Date Deposited: |
26 Apr 2016 16:49 |
Last Modified: |
29 Mar 2023 23:34 |
Publisher DOI: |
10.1103/PhysRevLett.115.091302 |
ArXiv ID: |
1507.07748v1 |
BORIS DOI: |
10.7892/boris.81223 |
URI: |
https://boris.unibe.ch/id/eprint/81223 |