• Corpus ID: 219721404

Observation of Excess Electronic Recoil Events in XENON1T

  title={Observation of Excess Electronic Recoil Events in XENON1T},
  author={Elena Aprile and J. Aalbers and F. Agostini and Matteo Alfonsi and L. Althueser and Fernando Domingues Amaro and Vasile Cristian Antochi and E. Angelino and J. R. Angevaare and Francesco Arneodo and Derek Barge and L. Baudis and Boris Bauermeister and Lorenzo Bellagamba and Mohamed Lotfi Benabderrahmane and Thomas Berger and A. M. Brown and Ethan Brown and S. Bruenner and Gianmarco Bruno and Ranny Budnik and Chiara Capelli and Jo{\~a}o M. R. Cardoso and Dominick Cichon and B. Cimmino and Michael Clark and Daniel Coderre and Auke-Pieter Colijn and Jan Conrad and J. P. Cussonneau and M. P. Decowski and Amanda Depoian and Pietro Di Gangi and Adriano Di Giovanni and Roberto Di Stefano and Sara Diglio and A. Elykov and Guillaume Eurin and Alfredo D. Ferella and Walter Fulgione and P. W. Gaemers and Romain Gaior and Michelle Galloway and F. Gao and Luca Grandi and Constanze Hasterok and C. M. Hils and Katsuki Hiraide and L. Hoetzsch and Joseph Howlett and Michele Iacovacci and Yoshitaka Itow and F. Joerg and N. Kato and Shingo Kazama and M. Kobayashi and G. Koltman and Abigail Kopec and Hagar Landsman and Rafael F. Lang and Lorne Levinson and Q. Lin and Sebastian Lindemann and Manfred Lindner and Francesco Lombardi and J. Long and Jos{\'e} A. M. Lopes and Ernesto L'opez Fune and Carla Macolino and J. Mahlstedt and A. Mancuso and L. Manenti and Alessandro Manfredini and Fabrizio Marignetti and Teresa Marrod'an Undagoitia and Kai Martens and Julien Masbou and Darryl Masson and Stefano Mastroianni and Marcello Messina and Kentaro Miuchi and Kei Mizukoshi and Andrea Molinario and Knut Dundas Moraa and S. Moriyama and Yossi Mosbacher and Michael Murra and Junji Naganoma and Kaixiang Ni and Uwe G. Oberlack and Kelly Odgers and Joaquim Palacio and Bart Pelssers and R. Peres and Jacques L. Pienaar and V. Pizzella and Guillaume Plante and J Qin and Hao Qiu and D. Ram'irez Garc'ia and Shayne Reichard and A. Rocchetti and Natascha Rupp and J. M. F. Santos and Gabriella Sartorelli and N. vSarvcevi'c and M. Scheibelhut and Jochen Schreiner and Daniel Schulte and Marc Schumann and Luca Scotto Lavina and Marco Selvi and F. Semeria and Peter Shagin and Evan Shockley and M. Silva and Hardy Simgen and Atsushi Takeda and C. Therreau and D. Thers and Francesco Toschi and G. C. Trinchero and Christopher Tunnell and M. A. Vargas and Giuseppe Volta and H. G. Wang and Y. Wei and Christian Weinheimer and M. Weiss and Daniel Wenz and Christian Wittweg and Z. Xu and Michiru Yamashita and J. Ye and Guido Zavattini and Yalin. Zhang and T. Zhu and J. P. Zopounidis and Xavier Mougeot},
  journal={arXiv: High Energy Physics - Experiment},
We report results from searches for new physics with low-energy electronic recoil data recorded with the XENON1T detector, with an exposure of 0.65 t-y and an unprecedentedly low background rate of $76 \pm 2_{stat}$ events/(t y keV) between 1-30 keV. An excess over known backgrounds is observed below 7 keV, rising towards lower energies and prominent between 2-3 keV. The solar axion model has a 3.5$\sigma$ significance, and a three-dimensional 90% confidence surface is reported for axion… 
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