TY  - JOUR
AU  - XENON Collaboration (Aprile, E. et al
AU  - Orrigo, S. E. A.
PY  - 2015
DA  - 2015//
TI  - Search for Event Rate Modulation in XENON100 Electronic Recoil Data
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 091302
EP  - 6pp
VL  - 115
IS  - 9
PB  - Amer Physical Soc
AB  - We have searched for periodic variations of the electronic recoil event rate in the (2-6) keVenergy 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 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 weakly interacting massive particles to electrons is excluded at 4.8 sigma.
SN  - 0031-9007
UR  - http://arxiv.org/abs/1507.07748
UR  - https://doi.org/10.1103/PhysRevLett.115.091302
DO  - 10.1103/PhysRevLett.115.091302
LA  - English
N1  - WOS:000360289000004
ID  - XENONCollaborationAprile+Orrigo2015
ER  -