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

Abstract

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] keV_{ee} ([4.9,40.9] keV_{nr}), exhibits an ultralow electron recoil background rate of [82_{-3}^{+5}(syst)±3(stat)] events/(ton yr keV_{ee}). 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.

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Affiliated Institutions

• Gran Sasso Science Institute IT
• Université Paris Cité FR
• National Institute for Subatomic Physics NL
• Institut National de Physique Nucléaire et de Physique des Particules FR
• University of Zurich CH
• Sorbonne Université FR
• AlbaNova SE
• IMT Atlantique FR
• Laboratoire de Physique Nucléaire et de Hautes Énergies FR
• Istituto Nazionale di Fisica Nucleare, Sezione di Bologna IT
• Rensselaer Polytechnic Institute US
• Rice University US
• University of Coimbra PT
• Max Planck Institute for Nuclear Physics DE
• Stockholm University SE
• University of Amsterdam NL
• Weizmann Institute of Science IL
• Centre National de la Recherche Scientifique FR
• University of Bologna IT
• Nantes Université FR
• University of Chicago US
• Laboratoire de Physique Subatomique et des Technologies Associées FR
• University of Münster DE
• University of California, San Diego US
• Columbia University US
• Osservatorio Astrofisico di Torino IT
• Johannes Gutenberg University Mainz DE
• University of Freiburg DE
• New York University Abu Dhabi AE
• Purdue University West Lafayette US
• Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso IT

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