Search for Event Rate Modulation in XENON100 Electronic Recoil Data

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

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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:

0031-9007

Publisher:

American Physical Society

Language:

English

Submitter:

Marc Schumann

Date Deposited:

26 Apr 2016 16:49

Last Modified:

26 Apr 2016 16:49

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

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