Speaker
Description
This presentation provides an overview of recent experimental efforts to constrain the nuclear equation of state (EoS), with a particular focus on the density dependence of the symmetry energy. A broad range of measurements, spanning beam energies from a few MeV/nucleon to a GeV/nucleon, will be discussed. These experiments probe different density regimes, from sub-saturation to supra-saturation, through a variety of isospin-sensitive observables.
Key observables include isospin diffusion, neutron-to-proton and triton-to-3He yield ratios, collective flow, charged pion production, cluster production, and pygmy dipole resonances (PDRs). Special emphasis will be placed on the interplay between neutron skin thickness, cluster formation, and PDRs, which provides powerful and complementary constraints on the slope parameter L of the symmetry energy at sub-saturation densities. Results from major experimental campaigns, including ASYEOS, INDRA-FAZIA, FOPI, SπRIT, and FRIB, will be presented, along with recent advances in detector systems and data analysis techniques. The role of current and future facilities: FRIB, FAIR, RIKEN, and SPIRAL2/GANIL, in enabling precision measurements across a wide range of isospin asymmetries will also be highlighted.
Together, these experimental efforts are instrumental in reducing uncertainties in the nuclear EoS and symmetry energy, and they provide critical guidance for theoretical modeling. Ultimately, they contribute to a unified understanding of asymmetric nuclear matter with far-reaching implications for both finite nuclei and astrophysical objects such as neutron stars and core-collapse supernovae.
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