Program area B - Electroweak interactions and nuclear astrophysics
In research area B, we will investigate consistent electroweak interactions in nuclei and
with nuclear matter in astrophysical environments based on chiral EFT. In the second
funding period, we will expand our efforts to
explore the nuclear physics involved in neutron star mergers and the associated kilonovas and gravitational wave signals.
Research area B will address the central questions:
How do electroweak interactions couple to nuclei?
How do nuclei, neutrinos, and the equation of state impact supernovae and neutron star mergers?
The projects are structured along the nuclear chart, where projects B01, B02, B04 focus
on electroweak interactions, and B05, B06,
B07 on nuclear astrophysics. Answering the key questions involves understanding the role of two-body currents for electroweak
transitions and testing these with electron scattering. We will use electromagnetic probes to explore forbidden transitions and to probe the nuclear structure involved in neutrino-nucleus scattering. A particular focus
will be on the dipole response and novel measurements of photoabsorption of nuclei, which constrains the
neutron equation of state. The electroweak reactions, combined with novel calculations of the nuclear matter
equation of state from low to high densities and finite temperature, will provide a systematic basis to study the
nucleosynthesis in core-collapse supernovae and neutron star mergers.