The XENON1T Dark Matter Search Experiment

Physics

Scientific paper

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Scientific paper

The worldwide race towards direct dark matter detection in the form of WIMPs has been dramatically accelerated by the remarkable progress and evolution of liquid xenon time projection chambers (LXeTPCs). With a realistic discovery potential, XENON100 has already reached a sensitivity of 7E-45 cm^2, and continues to accrue data at the Laboratori Nazionali del Gran Sasso (LNGS) in Italy towards its ultimate sensitivity reach at the 2E-45 cm^2 level for the spin-independent WIMP-nucleon cross-section. To fully explore the favored parameter space for WIMP dark matter in search of a first robust and statistically significant discovery, or to confirm any hint of a signal from XENON100, the next phase of the XENON program will be a detector at the ton scale - XENON1T. The XENON1T detector, based on 2.2 ton of LXe viewed by low radioactivity photomultiplier tubes and housed in a water Cherenkov muon veto at LNGS, is presented. The detector design is advancing and construction of major systems will begin in 2012, with data taking beginning in 2015. Capable of probing WIMP interaction cross-sections to ˜2E-47cm^2 within 2 years of operation, XENON1T will provide the sensitivity to probe a particularly favorable region of electroweak physics.

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