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Search for Dark Matter from XENONnT data

by Julien Bolmont - 25 October 2018

Titre : Search for Dark Matter from XENONnT data

Directeur de thèse : Luca Scotto Lavina

Equipe : Rayonnement Cosmique et Matière Noire ; XENON experiment

Description :

The Xenon group at LPNHE is strongly involved on the direct dark matter detection within the international XENON Collaboration, who designed and built the XENON1T detector. The XENON1T experiment is based on a double phase Time Projection Chamber made by liquid xenon (LXe TPC), installed at the Gran Sasso underground laboratory (LNGS), in Italy. The data taking is finished and latest studies are ongoing. XENON1T is the most performing detector to date for the direct detection of dark matter particles heavier than 7GeV. The Collaboration is now completing the construction of XENONnT, the XENON1T upgrade, that has a sensitivity improved by a factor ten. With XENONnT we will be capable to scope an unexplored region. XENONnT will start taking data on Fall 2019. The LPNHE Xénon group is strongly involved in data analysis and will also participate to the development of a data quality monitoring system. It consists in developping a series of pre-analysis algorithms that will allow us to mesure key parameters like xenon purity, the light yield of the detector and the possible contamination of backgrounds that may compromise the sensifivity of the experience to the dark matter. This monitoring system is prioritary to guarantee an extremely stable background rate over time and will allow to search for dark matter through the search for a possible annual modulation signal, an analysis channel for which the LPNHE is already involved for XENON1T.

Location : LPNHE, Paris

Contact : Luca Scotto Lavina, 33 (0)1 44 27 41 79

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