30 research outputs found
Production of hypertritons in heavy ion collisions around the threshold of strangeness production
We use the Isospin Quantum Molecular Dynamics approach supplemented with a
phase space coalescence to study the properties of the production of
hypertritons. We see strong influences of the hyperon rescattering on the
yields. The hypertritons show up to be quite aligned to the properties of
nuclear matter underlining the necessity of rescattering to transport the
hyperons to the spectator matter.Comment: 8 pages, proceedings of 14th International Conference on Nuclear
Reaction Mechanisms, Varenna (Italy), 201
Checkliste zur UnterstĂĽtzung der Helmholtz-Zentren bei der Implementierung von Richtlinien fĂĽr nachhaltige Forschungssoftware
Mit der voranschreitenden Digitalisierung von Forschung und Lehre steigt die Zahl an Software-Lösungen, die an wissenschaftlichen Einrichtungen entstehen und zur Erkenntnisgewinnung genutzt werden. Die – unter dem Stichwort Open Science geforderte – Zugänglichkeit und Nachnutzung von wissenschaftlichen Ergebnissen kann in vielen Fachgebieten nur sichergestellt werden, wenn neben Forschungsdaten auch Programmcode offen zugänglich gemacht wird. Die vorliegende Handreichung richtet sich an Entscheider*innen in den Helmholtz-Zentren, die sich mit der Implementierung von Richtlinien für nachhaltige Forschungssoftware befassen. Sie ergänzt eine Muster-Richtlinie, die den Zentren bereits eine richtungsweisende und nachnutzbare Vorlage zur Erstellung von Regelungen für einen nachhaltigen Umgang mit Forschungssoftware gibt
Strangeness Production close to Threshold in Proton-Nucleus and Heavy-Ion Collisions
We discuss strangeness production close to threshold in p+A and A+A
collision. Comparing the body of available K+, K0, K-, and Lambda data with the
IQMD transport code and for some key observables as well with the HSD transport
code, we find good agreement for the large majority of the observables. The
investigation of the reaction with help of these codes reveals the complicated
interaction of the strange particles with hadronic matter which makes
strangeness production in heavy-ion collisions very different from that in
elementary interactions. We show how different strange particle observables can
be used to study the different facets of this interaction (production,
rescattering and potential interaction) which finally merge into a
comprehensive understanding of these interactions. We identify those
observables which allow for studying (almost) exclusively one of these
processes to show how future high precision experiments can improve our
quantitative understanding. Finally, we discuss how the K+ multiplicity can be
used to study the hadronic equation of state.Comment: 134 pages, pdf 3.3MB, version to be published in Physics Report
Strangeness at high
Strangeness production in heavy-ion reactions at incident energies at or below the threshold in NN collisions gives access to the characteristics of bulk nuclear matter and the properties of strange particles inside the hot and dense nuclear medium, like potentials and interaction cross sections. At these energies strangeness is produced in multi-step processes potentially via excitation of intermediate heavy resonances. The amount of experimental data on strangeness production at these energies has increased substantially during the last years due to the FOPI and the HADES experiments at SIS18 at GSI. Experimental data on K+ and K0 production support the assumption that particles with an
Systematics of azimuthal asymmetries in heavy ion collisions in the 1A GeV regime - Data to figures
Files are named according to the figure numbers in the publication, the data structure are described in the files. The following convention is used for the centrality bins: C1: , C2: , C3: , C4: $b<0.25 b_0