CNRS Université Bordeaux

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The theory group at CENBG is working along two main lines: nuclear structure studies and hadronic physics. In the first domain, the accent is currently on mean field approaches using effective nucleon-nucleon interaction. Correlations (of the pairing or RPA type) are taken into account within an approach which explicitly conserves ab initio the number of particles. The main physical issues considered lately are the quenching of pairing correlations in high-K isomers, intrinsic vortical currents in highly rotating states and a novel understanding of the spin of fission fragments as resulting from an orientation pumping mechanism based on the Heisenberg principle.

At the energy scale of nuclear physics, the effective degrees of freedom are the hadronic ones. However, hadrons are composite objects and their behaviour in nuclear matter should reflect the underlying dynamics of the quarks. Starting from models taking into account the quark degrees of freedom, like for example the Nambu-Jona-Lasinio model, the group is involved in the construction of effective non-linear hadronic Lagrangians and in the calculation of physical observables sensitive to the substructure of the hadrons like dilepton production rates, in-medium vector-mesons mass,...already measured or which should be available soon via experiments performed for example at CERN, Bonn, KEK, Brookhaven or GSI Darmstadt