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Portail > Offres > Offre UMR9012-MARLOU-021 - Post-doc (H/F) : Analyse de données pour l'expérience HADES

Post-doctoral researcher (H/F) : Data analysis in the HADES experiment

This offer is available in the following languages:
Français - Anglais

Date Limite Candidature : mardi 24 mai 2022

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General information

Reference : UMR9012-MARLOU-021
Workplace : ORSAY
Date of publication : Tuesday, May 3, 2022
Type of Contract : FTC Scientist
Contract Period : 24 months
Expected date of employment : 1 September 2022
Proportion of work : Full time
Remuneration : Between 2743 and 3161€ gross monthly depending on experience
Desired level of education : PhD
Experience required : Indifferent


The High Acceptance Di-Electron Spectrometer (HADES) installed at SIS18/GSI (heavy ion research centre), in Darmstadt (Germany), is used to explore the QCD phase diagram in the region of moderate temperatures and high net baryon densities. Fixed-target experiments with heavy-ion collisions in the 1-2 GeV/nucleon incident energy range are used for these studies and measurements at higher energies are also foreseen with beams of the SIS100/FAIR facility under construction on the same experimental site. IJClab is very active in the elementary reaction program, which is developed using proton, deuterium or pion beams delivered by SIS18 on hydrogen targets. Such data are used to establish a reference for medium effects and constrain the model inputs, and also to allow for specific hadronic physic studies, in connection with baryon resonance or hyperon excitation.
In the context of the FAIR Phase-0 program, the HADES team at IJClab contributed to the recent upgrade of the HADES set-up, which allows for an enhanced detection of e+e- pairs, photons and charged hadrons in a wide acceptance. This improved set-up was recently used by the HADES collaboration to measure the proton-proton reaction at an incident energy of 4.5 GeV. High statistics data have been recorded for a large variety of poorly known channels, with special interest on e+e- and strangeness production. The post-doctoral fellow will be responsible for the analysis of the production of K+K- pairs, which should provide new information on the role of hyperons and of the phi meson in strangeness production, with an impact both in hadronic and heavy ion physics. The work will take place in the context of the international HADES collaboration, consisting of about 120 members.


The analysis of the K+K- channel will require a careful study of kaon identification quality. For the phi production study, the use of kinematic fit techniques can be exploited. The successful candidate will also take part in the interpretation of the results, in collaboration with theoreticians. In addition, the postdoctoral fellow will contribute to the supervision of a PhD student analyzing the e+e- production channel. He/she will regularly present his/her results in different meetings (working groups, analysis meetings, collaboration meetings,…) and in conferences and prepare a publication of his/her results.
The results should have an impact both in the domain of hadronic and heavy-ion physics.


• Education: PhD in experimental hadronic or heavy-ion physics, with a good background in data analysis and simulations using C++ and ROOT.
• Good communication skills and ability to work independently and in a team

Work Context

The Laboratory of the physics of the two infinities Irène Joliot-Curie (IJCLab) is a joint institute of CNRS/IN2P3 and of Paris Saclay and Paris Cité universities, located on the Orsay campus, 20 km south of Paris and easily reachable by train. Gathering about 740 people with research topics related to nuclear physics, particle physics, cosmology and connected fields, IJCLab is the largest CNRS laboratory in this domain. The HADES team is included in the High Energy Physics Department and consists of 1 senior physicist, 1 emeritus and two PhD students.
The post-doctoral fellow will benefit from existing collaborations with other teams as part of the HADES collaboration, in particular GSI/Darmstadt and Krakow, but also with several groups of theoreticians

Constraints and risks

Frequent travels to GSI (heavy ion research centre), in Darmstadt (Germany), are mandatory.

Additional Information

As the laboratory is in a zone with restricted access, the recruitment is conditional on the acceptance by the High Official for Security and Defence.

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