11 May 2024
Job Information
- Organisation/Company
CNRS- Department
Astroparticule et Cosmologie- Research Field
Physics- Researcher Profile
First Stage Researcher (R1)- Country
France- Application Deadline
31 May 2024 - 23:59 (UTC)- Type of Contract
Temporary- Job Status
Full-time- Hours Per Week
35- Offer Starting Date
1 Oct 2024- Is the job funded through the EU Research Framework Programme?
Not funded by an EU programme- Is the Job related to staff position within a Research Infrastructure?
No
Offer Description
The work site will be the APC laboratory (Paris), where the successful candidate will join the DarkSide team, which coordinates data reconstruction, simulation, and sensitivity studies for the DarkSide-20k Collaboration. In particular, the APC team led the recent data analyses using the 50-kg LAr DarkSide-50 experiment, which have recently improved existing limits on interactions of <4-GeV/c2 mass WIMPs, and has developed a highly optimized python-based data reconstruction framework for DarkSide-20k.
Dark Matter is one of the main puzzles in fundamental physics and Weakly Interacting Massive Particles (WIMP) are among the best-motivated dark matter particle candidates. As of today, the most sensitive experimental technique to discover the WIMPs in the mass range from 1 GeV/c2 to 10 TeV/c2 is the dual phase Time Projection Chamber (TPC) filled with noble liquids. The “dual-phase” approach has the main advantage to provide simultaneous access to the ionization and to the scintillation signals. This enables accurate reconstruction of the event topology and powerful discrimination between electronic and nuclear recoils, the latter being the signal expected from WIMP dark matter candidates. These features, together with the scalability to massive detectors, make liquid argon (LAr) a compelling target for WIMPs of mass >20 GeV/c2.
LAr can further extend its physics potential by looking at the ionization channel only, dropping the scintillation one. Indeed, the efficiency of detecting a single ionization electron is much higher than that of a scintillation photon. The price is the loss of particle identification based on the scintillation pulse shape, but the gain is in the detection threshold. Such a low threshold opens up many opportunities enabling the search for very light candidates of WIMPs (10 MeV/c2 - 1 GeV/c2 mass range), sterile neutrinos, and axions. Moreover, that energy region is sensitive to neutrino interactions via coherent elastic scattering with nuclei, a reaction characterized by the highest cross section for MeV-range neutrinos, such as from the Sun and galactic and extragalactic core-collapse supernovae.
The PhD candidate will focus his/her work on extending the DarkSide-20k physics potential to "light" signals, id est those induced by light dark matter particles (low-mass WIMPs, sterile neutrinos, dark photons, and axions) and by core-collapse supernova neutrinos. He/she will import signal models already coded for the DarkSide-50 analyses into the DarkSide-20k framework and investigate the background components affecting the low energy region with Monte Carlo simulation. At the same time, the candidate will model the LAr ionization and detector responses to nuclear and electronic recoils in the keV range.
Requirements
- Research Field
- Physics
- Education Level
- Master Degree or equivalent
- Languages
- FRENCH
- Level
- Basic
- Research Field
- Physics
- Years of Research Experience
- None
Additional Information
- Website for additional job details
https://emploi.cnrs.fr/Offres/Doctorant/UMR7164-DAVFRA-013/Default.aspx
Work Location(s)
- Number of offers available
- 1
- Company/Institute
- Astroparticule et Cosmologie
- Country
- France
- City
- PARIS 13
- Geofield
Where to apply
- Website
https://emploi.cnrs.fr/Candidat/Offre/UMR7164-DAVFRA-013/Candidater.aspx
Contact
- City
PARIS 13- Website
http://www.apc.univ-paris7.fr/APC_CS/
STATUS: EXPIRED
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