Mainz 2022 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 35: Heavy-Ion Collisions and QCD Phases VII
HK 35.1: Gruppenbericht
Mittwoch, 30. März 2022, 14:00–14:30, HK-H1
Creation of fragile anti- and hyper- matter at the LHC — •Janik Ditzel for the ALICE collaboration — Institut für Kernphysik, Goethe-Universität, Frankfurt, Germany
At the Large Hadron Collider at CERN, copious production of light (anti-)(hyper-)nuclei has been measured in Pb–Pb collisions by the ALICE collaboration. The production of such (anti-)(hyper-)nuclei has recently become a topic of high interest, connecting for instance to the possible strangeness content in neutron stars. The most prominent example is the (anti-)hypertriton, which is a bound state of a proton, a neutron and a Λ hyperon. These (anti-)(hyper-)nuclei are reconstructed by their decay products, e.g. in the case for the charged two-body decay channel of the hypertriton: Λ3H → 3He + π−. The excellent performance of the ALICE apparatus provides a clear particle identification of the daughters and a perfect reconstruction of the decay vertex. Together with results on the production of light (anti-)nuclei, we will show the latest measurement of the Λ separation energy and lifetime of the (anti-)hypertriton and a comparison to different production models. Furthermore, we will show first results on the measurement of (anti-)hypernuclei within the A=4 mass region.
Supported by BMBF and the Helmholtz Association.