Dark Matter Search Results from a One Ton-Year Exposure of XENON1T

E. Aprile , J. Aalbers , F. Agostini , M. Alfonsi , L. Althueser , F.D. Amaro , M. Anthony , F. Arneodo , L. Baudis , B. Bauermeister , M.L. Benabderrahmane , T. Berger , P.A. Breur , Andrew G. Brown , Adam Brown , E. Brown , S. Bruenner , G. Bruno , R. Budnik , C. Capelli , J.M.R. Cardoso , D. Cichon , D. Coderre , A.P. Colijn , J. Conrad , J.P. Cussonneau (1) , M.P. Decowski , P. de Perio , P. Di Gangi , A. Di Giovanni , S. Diglio (1) , A. Elykov , G. Eurin , J. Fei , A.D. Ferella , A. Fieguth , W. Fulgione , A. Gallo Rosso , M. Galloway , F. Gao , M. Garbini , C. Geis , L. Grandi , Z. Greene , H. Qiu , C. Hasterok , E. Hogenbirk , J. Howlett , R. Itay , F. Joerg , B. Kaminsky , S. Kazama , A. Kish , G. Koltman , H. Landsman , R.F. Lang , L. Levinson , Q. Lin , S. Lindemann , M. Lindner , F. Lombardi , J.A.M. Lopes , J. Mahlstedt , A. Manfredini , T. Marrodán Undagoitia , J. Masbou (1) , D. Masson , M. Messina , K. Micheneau (1) , K. Miller , A. Molinario , K. Morå , M. Murra , J. Naganoma , K. Ni , U. Oberlack , B. Pelssers , F. Piastra , J. Pienaar , V. Pizzella , G. Plante , R. Podviianiuk , N. Priel , D. Ramírez García , L. Rauch , S. Reichard , C. Reuter , B. Riedel , A. Rizzo , A. Rocchetti , N. Rupp , J.M.F. dos Santos , G. Sartorelli , M. Scheibelhut , S. Schindler , J. Schreiner , D. Schulte , M. Schumann , L. Scotto Lavina (2) , M. Selvi , P. Shagin , E. Shockley , M. Silva , H. Simgen , D. Thers (1) , F. Toschi , G. Trinchero , C. Tunnell , N. Upole , M. Vargas , O. Wack , H. Wang , Z. Wang , Y. Wei , C. Weinheimer , C. Wittweg , J. Wulf , J. Ye , Y. Zhang , T. Zhu

1 SUBATECH - Laboratoire de physique subatomique et des technologies associées
2 LPNHE (UMR_7585) - Laboratoire de Physique Nucléaire et de Hautes Énergies

We report on a search for weakly interacting massive particles (WIMPs) using 278.8 days of data collected with the XENON1T experiment at LNGS. XENON1T utilizes a liquid xenon time projection chamber with a fiducial mass of (1.30±0.01)  ton, resulting in a 1.0 ton yr exposure. The energy region of interest, [1.4,10.6]  keVee ([4.9,40.9] keVnr), exhibits an ultralow electron recoil background rate of [82$_-$$_3$$^+$$^5$(syst) ± 3 (stat)]  events/(t x yt x keV$_e$$_e$). No significant excess over background is found, and a profile likelihood analysis parametrized in spatial and energy dimensions excludes new parameter space for the WIMP-nucleon spin-independent elastic scatter cross section for WIMP masses above 6  GeV/c$^2$, with a minimum of 4.1 × 10-47  cm$^2$ at 30  GeV/c$^2$ and a 90% confidence level.

Keywords: WIMP: mass; time projection chamber: xenon; electron: recoil; dark matter: direct detection; xenon: liquid; background; WIMP nucleon; dark matter: mass; Gran Sasso; numerical calculations

Domains: Instrumentation and Methods for Astrophysic [astro-ph.IM]; High Energy Physics - Experiment [hep-ex]; High Energy Physics - Phenomenology [hep-ph]

E. Aprile, J. Aalbers, F. Agostini, M. Alfonsi, L. Althueser, et al.. Dark Matter Search Results from a One Ton-Year Exposure of XENON1T. Physical Review Letters, 2018, 121 (11), pp.111302. ⟨10.1103/PhysRevLett.121.111302⟩. ⟨hal-01815182⟩