Exclusion of leptophilic dark matter models using XENON100 electronic recoil data

Aprile, E.; Agostini, F.; Alfonsi, M.; Arazi, L.; Arisaka, K.; Arneodo, F.; Auger, M.; Balan, C.; Barrow, P.; Baudis, L.; Bauermeister, B.; Behrens, A.; Brown, A.; Brown, E.; Bruenner, S.; Bruno, G.; Budnik, R.; Bütikofer, Lukas; Cardoso, J. M. R.; Cervantes, M.; ... (2015). Exclusion of leptophilic dark matter models using XENON100 electronic recoil data. Science, 349(6250), pp. 851-854. American Association for the Advancement of Science 10.1126/science.aab2069

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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; Coderre, Daniel; Kaminsky, Jan Basho and Schumann, Marc

Subjects:

500 Science > 530 Physics

ISSN:

0036-8075

Publisher:

American Association for the Advancement of Science

Language:

English

Submitter:

Marc Schumann

Date Deposited:

26 Apr 2016 14:57

Last Modified:

22 Aug 2016 02:30

Publisher DOI:

10.1126/science.aab2069

ArXiv ID:

1507.07747

BORIS DOI:

10.7892/boris.81222

URI:

https://boris.unibe.ch/id/eprint/81222

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