진학프로석·박사 채용 접수 플랫폼

The Neutrino group at Subatech in Nantes, France, is offering a 24-month postdoctoral position in low-energy neutrino physics as part of the JUNO experiment. Subatech is a research laboratory jointly operated by Nantes University, IMT Atlantique, and CNRS-IN2P3.

The Neutrino group is actively engaged in medium- and short-baseline reactor neutrino experiments (SoLid, Double Chooz, and JUNO), astrophysical neutrino detection (KM3NeT), and neutrino detector R&D, particularly through the development of LiquidO technology.

Within the JUNO collaboration, the team focuses on precision measurements of neutrino oscillation parameters and the determination of neutrino mass ordering. Additionally, the group contributes to JUNO’s program on supernova neutrinos.

This position is funded by the French National Research Agency (ANR) as part of the project "First Per-Mille Precision and 5σ Neutrino Mass Ordering Determination with JUNO." The project is coordinated by Subatech (PI: Prof. F. Yermia) in collaboration with IJCLAB (PI: Dr. A. Cabrera). Over the next decade, the field of neutrino fundamental physics will see one of the largest investments in history, driven by three flagship experiments: DUNE (USA), Hyper-Kamiokande (Japan), and JUNO (China).

Together, these experiments will significantly improve global precision in studying neutrino oscillations within the standard framework. In addition to refining known parameters, they are expected to achieve groundbreaking discoveries, including the long-sought determination of neutrino mass ordering and the potential observation of leptonic CP violation.

Among them, JUNO stands out as one of the largest and most precise neutrino oscillation experiments. It boasts world-leading sensitivity to key parameters such as δm², θ₁₂, |Δm²|, and has a unique capability to determine neutrino mass ordering (±Δm²).

This ANR-funded project is designed to capitalize on JUNO’s first data, positioning it at the forefront of:
• Achieving unprecedented precision in neutrino oscillation experiments, reaching the first per- mille accuracy while rigorously controlling systematics through novel experimental techniques pioneered by the Subatech team.
• Establishing the first robust determination of neutrino mass ordering (NMO).
• Enhancing synergies between neutrino experiments, maximizing JUNO’s standalone precision, and boosting its discovery potential—ultimately achieving a 5σ significance on NMO.

Extensive studies conducted by our teams, now widely published [1], have demonstrated the feasibility of this ambitious physics program. Many of these advancements stem from the Dual Calorimetry design [2] of the JUNO detector—an innovative concept proposed by our teams. This breakthrough significantly improves detector systematics control, further enhancing JUNO’s potential for major discoveries.

Role of the Postdoctoral Researcher
The successful candidate will play a key role in analyzing JUNO’s first data, expected in 2025. Their contributions will include:
• Refining JUNO’s energy model, a critical component of the experiment.
• Optimizing the use of Dual Calorimetry to enhance energy reconstruction and detector calibration.
• Developing and improving statistical tools, including the fitter, to enable high-precision measurements and mass ordering measurement.

International Research Environment
This research will be conducted within the JUNO international collaboration, based at Subatech, with frequent research visits to China and other collaborating countries, including partners in Asia and Brazil (Prof. H. Nunokawa). The primary objective is to make leading scientific contributions to JUNO’s physics program while fostering innovative, high-impact research. The postdoctoral candidate will be required to travel regularly to China, near the JUNO experimental site, for a portion of the contract. One of the expected tasks is to actively support the detector calibration operations as part of the dual-calorimetry scientific program. This involvement will be particularly intense during the initial data-taking phase (≥1 year), including the detector commissioning. The recruited researcher will work closely with members of the Subatech team (M. Bongrand, B. Viaud, and F. Yermia) as well as A. Cabrera at IJCLAB.

References
[1] Cabrera, A., Han, Y., Obolensky, M. et al. Synergies and prospects for early resolution of the neutrino mass ordering. Sci Rep 12, 5393 (2022). https://doi.org/10.1038/s41598-022-09111-1

[2] Cabrera, A., Han, Y., Calvez, S. et al. Multi-calorimetry in light-based neutrino detectors. J. High Energ. Phys. 2024, 2 (2024). https://doi.org/10.1007/JHEP12(2024)002