Speaker
Description
The XENON1T experiment for the direct detection of dark matter is located at the Laboratori Nazionali del Gran Sasso in Italy. The detector uses 3.2 tons of liquid xenon with ~2 tons being inside the dual phase time projection chamber (TPC).
A first dark matter search conducted between November 2016 and January 2017 in a 5-40 keV$_{\mathrm{nr}}$ energy window did not yield evidence for dark matter interactions within the 35.6 (ton $\times$ day) exposure. This allowed to set the most stringent limits so far on the spin-independent scattering cross section of Weakly Interacting Massive Particles (WIMP) on nucleons for WIMP masses above
10 GeV/c$^2$. The limit features a minimum of $7.7\times10^{-47}$cm$^2$ for 35 GeV/c$^2$ WIMPs at 90% confidence level. Since this science run 0 result a total exposure of 1 (ton$\times$year) has been acquired allowing a significant step in sensitivity of direct dark matter search. Additionally to the large exposure, XENON1T's sensitivity relies on an electronic recoil background below
$2\times10^{-4}$ events/(kg $\times$ day $\times$ keV$_\mathrm{ee}$) - the lowest ever achieved for a dark matter detector.
This talk will describe the XENON1T detector, the data analysis and the results of the new science run 1.
