First Dark Matter Search Results from the XENON1T Experiment.

E Aprile,F Gao,H Wang,N Rupp,J Fei,M Lindner,Y Zhang,T Zhu,L Baudis,L Rauch,W Fulgione,G Eurin,C Grignon,A Gallo Rosso,S Diglio,J Ye,Z Greene,C Tunnell,D Mayani,S Lindemann,L Grandi,D Coderre,P De Perio,J Schreiner,F Arneodo,G Sartorelli,J Calvén,J Wulf,A Di Giovanni,A Kish,M Scheibelhut,C Reuter,N Upole,C Weinheimer,Q Lin,P Shagin,G Bruno,F Agostini,M Galloway,K Ni,N Priel,Z Wang,E Brown,M Cervantes,A Fieguth,A Tiseni,S Kazama,P Di Gangi,F Piastra,J Pienaar,F Lombardi,V Pizzella,R Persiani,M Murra,B Bauermeister,B Kaminsky,A Molinario,S Bruenner,H Simgen,R Saldanha,L Scotto Lavina,A Manfredini,S Reichard,A Stein,R Budnik,J Conrad,R Itay,B Pelssers,D Masson,J Masbou,M Garbini,D Thers,M Vargas,G Plante,E Shockley,C Geis,J Howlett,M Alfonsi,T Berger,D Lellouch,U Oberlack,D Cichon,M Messina,C Hasterok,G Trinchero,J Aalbers,K Micheneau,A Brown,H Landsman,P Pakarha,J Naganoma,G Kessler,E Hogenbirk,M Selvi,K Morå,T Marrodán Undagoitia,L Bütikofer,A Rizzo,Y Wei,M P Decowski ,S S.e Rosendahl ,J A M Lopes ,J M F Dos Santos ,S M Schindler ,L W Goetzke ,Ioana Codrina Maris ,J M R Cardoso ,L J Levinson ,P A Breur ,M L Benabderrahmane ,R W Gardner ,R F Lang ,Peter Barrow ,A P Colijn ,M T Anthony ,Miguel Silva ,M Schümann ,M.‐C Piro ,Suchandra Thapa ,F V Massoli ,A D Ferella ,J P Cussonneau ,Benedikt Riedel ,M V Sivers ,F D Amaro

doi:10.1103/physrevlett.119.181301

Abstract

We report the first dark matter search results from XENON1T, a ∼2000-kg-target-mass dual-phase (liquid-gas) xenon time projection chamber in operation at the Laboratori Nazionali del Gran Sasso in Italy and the first ton-scale detector of this kind. The blinded search used 34.2 live days of data acquired between November 2016 and January 2017. Inside the (1042±12)-kg fiducial mass and in the [5,40] keV_{nr} energy range of interest for weakly interacting massive particle (WIMP) dark matter searches, the electronic recoil background was (1.93±0.25)×10^{-4} events/(kg×day×keV_{ee}), the lowest ever achieved in such a dark matter detector. A profile likelihood analysis shows that the data are consistent with the background-only hypothesis. We derive the most stringent exclusion limits on the spin-independent WIMP-nucleon interaction cross section for WIMP masses above 10 GeV/c^{2}, with a minimum of 7.7×10^{-47} cm^{2} for 35-GeV/c^{2} WIMPs at 90%C.L.

Highlights

We report the first dark matter search results from XENON1T, a ∼2000-kg-target-mass dual-phase xenon time projection chamber in operation at the Laboratori Nazionali del Gran Sasso in Italy and the first ton-scale detector of this kind
Inside the ð1042 Æ 12Þ-kg fiducial mass and in the 1⁄25; 40 keVnr energy range of interest for weakly interacting massive particle (WIMP) dark matter searches, the electronic recoil background was ð1.93 Æ 0.25Þ × 10−4 events=ðkg × day × keVeeÞ, the lowest ever achieved in such a dark matter detector
Theories beyond the standard model of particle physics often attribute this energy density to weakly interacting massive particles (WIMPs) that may be detectable by underground detectors [5,6]