Aprile E, Aalbers J, Agostini F, Alfonsi M, Amaro F D, Anthony M, Arneodo F, Barrow P, Baudis L, Bauermeister B, Benabderrahmane M L, Berger T, Breur P A, Brown A, Brown A, Brown E, Bruenner S, Bruno G, Budnik R, Bütikofer L, Calvén J, Cardoso J M R, Cervantes M, Cichon D, Coderre D, Colijn A P, Conrad J, Cussonneau J P, Decowski M P, de Perio P, Di Gangi P, Di Giovanni A, Diglio S, Eurin G, Fei J, Ferella A D, Fieguth A, Fulgione W, Gallo Rosso A, Galloway M, Gao F, Garbini M, Gardner R, Geis C, Goetzke L W, Grandi L, Greene Z, Grignon C, Hasterok C, Hogenbirk E, Howlett J, Itay R, Kaminsky B, Kazama S, Kessler G, Kish A, Landsman H, Lang R F, Lellouch D, Levinson L, Lin Q, Lindemann S, Lindner M, Lombardi F, Lopes J A M, Manfredini A, Mariş I, Marrodán Undagoitia T, Masbou J, Massoli F V, Masson D, Mayani D, Messina M, Micheneau K, Molinario A, Morå K, Murra M, Naganoma J, Ni K, Oberlack U, Pakarha P, Pelssers B, Persiani R, Piastra F, Pienaar J, Pizzella V, Piro M-C, Plante G, Priel N, Rauch L, Reichard S, Reuter C, Riedel B, Rizzo A, Rosendahl S, Rupp N, Saldanha R, Dos Santos J M F, Sartorelli G, Scheibelhut M, Schindler S, Schreiner J, Schumann M, Scotto Lavina L, Selvi M, Shagin P, Shockley E, Silva M, Simgen H, Sivers M V, Stein A, Thapa S, Thers D, Tiseni A, Trinchero G, Tunnell C, Vargas M, Upole N, Wang H, Wang Z, Wei Y, Weinheimer C, Wulf J, Ye J, Zhang Y, Zhu T
Physics Department, Columbia University, New York, New York 10027, USA.
Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam, Netherlands.
Phys Rev Lett. 2017 Nov 3;119(18):181301. doi: 10.1103/PhysRevLett.119.181301. Epub 2017 Oct 30.
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.
我们报告了XENON1T的首批暗物质搜索结果。XENON1T是一个目标质量约为2000千克的双相（液 - 气）氙时间投影室，位于意大利大萨索国家实验室运行，是此类首个吨级探测器。此次盲搜使用了2016年11月至2017年1月期间采集的34.2个有效天的数据。在（1042±12）千克的本征质量内，以及在弱相互作用大质量粒子（WIMP）暗物质搜索感兴趣的[5,40]keV_nr能量范围内，电子反冲背景为（1.93±0.25）×10^{-4}事件/（千克·天·keV_ee），这是此类暗物质探测器中迄今达到的最低值。轮廓似然分析表明，数据与仅含背景的假设一致。对于质量高于10 GeV/c²的WIMP，我们得出了关于自旋无关的WIMP - 核子相互作用截面的最严格排除极限，对于35 GeV/c²的WIMP，在90%置信水平下最小值为7.7×10^{-47}cm²。
