17-22 July 2016
Master Cutlers Hall
Europe/London timezone

Event rate modulation in XENON100 -results and prospects.

20 Jul 2016, 14:00
20m
Venue: Cutlers' Main Hall (First Floor); Chair: Yeongduk Kim; Session Manager: David Woodward ()

Venue: Cutlers' Main Hall (First Floor); Chair: Yeongduk Kim; Session Manager: David Woodward

Speaker

Mr. Bart Pelssers (Stockholm University)

Description

Periodic variations in the event rate of direct detection experiments can be a signal of dark matter. An event rate modulation with a period of one year, annual modulation, can be explained as an effect of the Earth's orbital motion and the Earth-Sun system moving through the galactic dark matter halo. The XENON collaboration has performed a search for event rate modulation using ~225 livedays of data from the XENON100 detector. The study showed no statistically significant modulation at any period up to 500 days. The interpretation of the best fit modulation as a dark matter signal is disfavoured due to its phase being inconsistent with the phase expected from the galactic dark matter halo. The analysis also excludes the DAMA/LIBRA annual modulation at 4.8 sigma. More data are being added in order to reach an even higher sensitivity. Secondly a new background model is being constructed which includes more information about the various time dependent background contributions.

Primary author

Mr. Bart Pelssers (Stockholm University)

Presentation Materials

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