Partenaires
Menu
Rechercher
Navigation
Accueil > Thèses, Stages, Formation et Enseignement > Propositions de thèses 2025 > Measurement of solar pp neutrinos flux in XENONnT and development of new electrodes for DARWIN
Measurement of solar pp neutrinos flux in XENONnT and development of new electrodes for DARWIN
par Tristan Beau - 5 novembre
Titre : Measurement of solar pp neutrinos flux in XENONnT and development of new electrodes for DARWIN
Directrice/directeur de thèse : Luca Scotto Lavina
Co-encadrant.e : Bernard Andrieu
Groupe d’accueil :XENON
Webpage du projet : https://xenonexperiment.org/
Collaboration : XENONnT
Description :
Astronomical and cosmological observations reveal that the vast majority of the
matter content of our universe is invisible – or dark – and interacts neither
strongly nor electromagnetically with ordinary matter. One of the leading
technologies today to detect eventual Dark Matter (DM) particles is dual-phase
liquid xenon (LXe) Time Projection Chambers (TPCs). The simultaneous detection
of both ionization and scintillation signals down to a few keV enables
dual-phase TPCs to be sensitive to low-energy depositions, the likely signature
of a DM particle scattering off a xenon atom. Thanks to an incredibly low
radioactive background and an unprecedented detector size (10 tons of LXe), the
XENONnT experiment, located at Gran Sasso National Laboratory (LNGS), an
underground laboratory built below the Apennine Mountains in Italy, is
world-leading for this research, but offers also a unique opportunity to explore
extremely rare processes, such as the detection of solar neutrinos. The solar pp
neutrinos (electron neutrinos produced by proton fusion reaction in the center
of the Sun) are the most abundant and can be detected in XENONnT via Electron
Recoil (ER) with an unprecedented low energy threshold, which will help to
constrain solar models. However this detection is a real challenge for present
detectors, such as XENONnT, and even more for the next generation DARWIN
detector, due to an experimental background composed of isolated electrons or
small electron clusters, whose origin remains largely unclear. It is the aim of
the Xelab R&D project, based on a small-scale dual-phase TPC installed at LPNHE,
to characterize this background source and test new concept of electrodes, less
sensitive to it, for DARWIN. The candidate will have therefore the chance to
work on the data analysis of XENONnT and at the same time to operate a local
Liquid Xenon TPC.
The candidate is encouraged to start an M2 internship in our group. The
activities we propose in 2025 for the internship are dual as well. From one
side, he/she will contribute to the improvement of the analysis of so-called
« S2 » (ionization) signals in XENONnT, by including a more detailed description
of a not-yet covered part of the electrodes in the simulation, then certifying
this new simulation via comparison with data. From the other side, we will start
the commissioning of XeLab, which is a great occasion to see a TPC starting
detecting its first light.
Lieu(x) de travail : LPNHE
Déplacements éventuels : LNGS Underground Laboratory, Italy
Stage proposé avant la thèse : Oui
Dans la même rubrique :
- Recherche de la violation de la conservation de la saveur des leptons chargés avec l’expérience LHCb au CERN
- Development of the new silicon pixel tracker for the upgrade of the ATLAS detector at the High Luminosity LHC (HL-LHC), study of the performance of the new design, and application to the research of new physics and precision Higgs measurements at HL-LHC
- Vers le multi-messagers à ultra-haute énergie avec GRAND
- Reconstruction du détecteur Hyper Kamiokande et étude d’oscillation des neutrinos avec ces premières données
- Top Mass measurement in all hadronic final state using Atlas detector
- Recherche directe de matière noire auprès de l’expérience DAMIC-M
- Mesure de la masse du quark top et de la fragmentation des quarks b avec des événements ttbar avec des mésons J/psi dans l’état final. Participation à la mise à niveau du détecteur ATLAS auprès du LHC
- Recherche de particule de type axion de longue durée de vie au LHC dans l’expérience ATLAS
- Caractérisation de l’énergie noire avec les supernovae de ZTF-II et LSST
- tudes de population de sources astrophysiques pour la recherche de violation d’invariance de Lorentz et des délais intrinsèques aux sources. Analyses combinées des données de H.E.S.S. et préparation aux analyses CTAO.
- Improving the discovery potential of XENONnT and XLZD on detecting dark matter with the study of their electrodes
