The low energy electronic recoil excess observed in the XENON1T experiment

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• Matteo Alfonsi (Johannes Gutenberg University of Mainz)
• Tuesday 14 July 2020, 16:00-17:00
• Ryle Seminar Room (Rutherford 930) .

If you have a question about this talk, please contact William Fawcett.

The XENON1T experiment has recently reported new results from the analysis of low energy electronic recoils data, characterized by the lowest background rate ever achieved in the energy range between 1 and 30 keV. An excess over known background has been observed around 2-3 keV, and this observation has been interpreted in terms of the existence of solar axions, or as an enhancement of the neutrino magnetic moment observed in solar neutrinos, or an additional background initially not considered. In the latter hypothesis, among the various possibilities considered such as traces of 127Xe or 37Ar or tritium diluted into the active volume, only the tritium hypothesis cannot be confirmed or excluded with the current knowledge of the production and reduction mechanism. In this seminar I will describe the detector operation, the analysis approach and the arguments that allowed us to arrive to such conclusions, trying to address also the additional questions that has been posed by the community

This talk is part of the Cavendish HEP Seminars series.

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• Neurons, Fake News, DNA and your iPhone: The Mathematics of Information
• Ryle Seminar Room (Rutherford 930)
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