57. International Winter Meeting on Nuclear Physics

Session

Wednesday Afternoon Session

Jan 23, 2019, 5:00 PM

Bormio, Italy

Conveners

Wednesday Afternoon Session

• Harald Merkel (Institut für Kernphysik, Johannes Gutenberg-Universität Mainz)

28. Comparison of Transport Codes for Intermediate Energy Heavy Ion Collisions under Controlled Conditions

Prof. Hermann Wolter (Univeristy of Munich)

1/23/19, 5:00 PM

Short Contribution

Transport descriptions of heavy ion collisions in the intermediate energy range are an important method to extract information on the nuclear equation-of-state which is also relevant for astrophysical processes. Different transport model codes have been developed and applied widely. The physical deductions of such analyses should be independent as much as possible of the particular model, or...

50. Breaking and restoration of rotational symmetry in the low-energy spectrum of light alpha-conjugate nuclei on the lattice

Mr Gianluca Stellin (Helmholtz Institut für Strahlen- und Kernphysik (HISKP) - Universität Bonn)

1/23/19, 5:20 PM

Short Contribution

The breaking of rotational symmetry on the lattice for bound eigenstates of the two lightest alpha conjugate nuclei is explored. Moreover, a macroscopic alpha-cluster model is used for investigating the general problems associated with the representation of a physical many-body problem on a cubic lattice. In view of the descent from the 3D rotation group to the cubic group symmetry, the role...

32. New Physics in Nuclear Collectivity – The Latest

Prof. John F. Sharpey-Schafer (University of the Western Cape)

1/23/19, 5:40 PM

Short Contribution

J. F. Sharpey-Schafer University of the Western Cape, Cape Town, South Africa Abstract Recent developments in the experimental data on “collective” structures at low excitation energies have challenged the traditional paradigms of the essential physics involved in the underlying configurations. The importance of systematic experimental studies, that vary the deformations and asymmetries of...

40. Development of an accurate DWIA model of coherent pion photoproduction to study neutron skins in medium heavy nuclei

Mr Frederic Colomer (ULB (Université Libre de Bruxelles))

1/23/19, 6:00 PM

Short Contribution

Despite decades of studies which have seen the nuclear charge distribution being measured with increasing precision, the neutron distribution remains elusive. The difference between the neutron and proton distributions is often expressed as the difference of their root mean square radii: the neutron skin thickness. Recently, the A2 collaboration at MaMi has measured the skin thickness in lead...

15. Machine Learning based jet momentum reconstruction in heavy-ion collisions

Ruediger Haake (Yale University)

1/23/19, 6:20 PM

Short Contribution

The precise reconstruction of jet transverse momenta in heavy-ion collisions is a challenging task. A major obstacle is the large number of (mainly) low-$p_\mathrm{T}$ particles overlaying the jets. Strong region-to-region fluctuations of this background complicate the jet measurement and lead to significant uncertainties. In this talk, a novel approach to correct jet momenta (or energies)...

6. DarkMESA: Light dark matter search at the MESA beam-dump

Prof. Patrick Achenbach (JGU Mainz)

1/23/19, 6:40 PM

Short Contribution

At the MESA accelerator in Mainz, Germany, the parasitic electron beam-dump experiment DarkMESA has a powerful discovery potential for dark sector particles in the light mass range. The possible existence of such light dark matter (LDM) is a candidate explanation for the long-standing dark matter problem. With 10 000 hours of operation time scheduled for P2 beam experiment at MESA, the dump...