Postdoctoral researcher on the ATLAS experiment at the LHC (M/F)

Job Description

Missions

The "Particle Physics" team at the Laboratoire des 2 Infinis – Toulouse (L2IT) is offering a postdoctoral position to strengthen its activities on the ATLAS experiment at the Large Hadron Collider (LHC) at CERN. The selected candidate will work within L2IT. His/Her work will focus on developing deep learning methods for the reconstruction and physical analysis of ATLAS experiment data.

Activity

The selected candidate will develop innovative analysis methods for the reconstruction and physical analysis of the ATLAS experiment data. The L2IT team plays a driving role within the ATLAS collaboration for the reconstruction of charged particle tracks using geometric deep learning (GDL). The person who joins us will be able to contribute to this effort, for example by applying GDL to signatures not considered in existing studies (tracks produced far from the detector center, tracks in dense environments), by using this reconstruction technique for the first time on data from Run 3 collisions, and by studying the performance achieved at the level of physical analyses. In addition, L2IT's research activity focuses on understanding the scalar sector of the Standard Model by considering both the Higgs boson and Nambu-Goldstone states. The selected candidate will be able to contribute, in particular, to studies of Higgs boson pair production.

Your Profil

Skills

We are looking for a doctor in particle physics with less than two years of experience after the PhD. Experience in machine learning and/or experience with reconstruction algorithms for particle physics would be a plus.

Your Work Environment

The Laboratoire des 2 Infinis - Toulouse (L2IT) is a laboratory created in 2020 to conduct research in fundamental physics with new numerical and theoretical approaches for data analysis. The laboratory's research focuses on particle physics, gravitational waves, and the equation of state of nuclear matter, and relies on complementary development of analysis methodologies and data science. L2IT is under the supervision of CNRS/IN2P3 and the Université de Toulouse.

The L2IT "Particle Physics" team contributes to the understanding of the dynamics of the scalar sector of the Standard Model through studies of the Higgs boson and the polarization of vector bosons. It participates in the development of data reconstruction software for the new Inner Tracker (ITk) that the ATLAS collaboration will install for the High Luminosity phase of the LHC. The selected candidate will work in close collaboration with other members of the "Particle Physics" team and with members of the "Computing, Algorithms, and Data" team at L2IT.

Application procedure:
Interested candidates must send:
1. A cover letter presenting their research project and their interest in joining the group
2. A Curriculum Vitae
3. A list of publications and internal notes to which they have contributed, highlighting their contributions
4. The email addresses of two referees; we will ask them to send letters of recommendation only after the pre-selection stage

The contract is for 2 years. A start in autumn 2026 is expected. The position is based in Toulouse, with the possibility of traveling to CERN if necessary.

Constraints and risks

The work follows the ATLAS collaboration timeline, with deadlines related to analyses and publications. Occasional missions to CERN, as well as travel to participate in workshops and scientific conferences in France and abroad, are to be expected. No particular risks other than those related to screen work and the use of computer equipment have been identified.

Compensation and benefits

Compensation

3041.58 € gross per month

Annual leave and RTT

44 jours

Remote Working practice and compensation

Pratique et indemnisation du TT

Transport

Prise en charge à 75% du coût et forfait mobilité durable jusqu’à 300€

About the offer

About the CNRS

The CNRS is a major player in fundamental research on a global scale. The CNRS is the only French organization active in all scientific fields. Its unique position as a multi-specialist allows it to bring together different disciplines to address the most important challenges of the contemporary world, in connection with the actors of change.

CNRS

The research professions