Speaker
Description
The dipole polarizability of $^{40}$Ca has been extracted from a zero-degree (p,p$^\prime$) experiment at RCNP [1]. Together with results from a previous experiment on $^{48}$Ca [2] it serves as a test of state-of-the-art ab initio [3,4] and EDF [5] calculations. From the good agreement obtained for both methods one can derive limits on the density dependence of the symmetry energy. These are clearly at variance with those derived [6] from the recently published result of the PREX-II experiment [7].
[1] P. von Neumann-Cosel and A. Tamii, Eur. Phys. J. A 55, 110 (2019).
[2] J. Birkhan et al., Phys. Rev. Lett. 118, 252501 (2017).
[3] J. Simonis, S. Bacca, and G. Hagen, Eur. Phys. J. A 55, 241 (2019).
[4] S. Kaufmann et al., Phys. Rev. Lett. 124, 132502 (2020).
[5] P.-G. Reinhard, X. Roca-Maza, and W. Nazarewicz, arXiv:2105.15050.
[6] D. Adhikari et al., Phys. Rev. Lett. 126, 172502 (2021).
[7] B.T. Reed et al., Phys. Rev. Lett. 126, 172503 (2021).
Supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - Project-ID 279384907 - SFB 1245.
