SMuK 2023 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 16: Heavy-Ion Collisions and QCD Phases III

HK 16.3: Vortrag

Dienstag, 21. März 2023, 17:45–18:00, SCH/A216

Investigation of mass A=4 (anti-)hypernuclei production at the LHC — •Janik Ditzel for the ALICE Germany collaboration — Institut für Kernphysik, Goethe-Universität, Frankfurt, Germany

At the Large Hadron Collider at CERN, light (anti-)hypernuclei are produced abundantly in Pb–Pb collisions. The production of such (anti-)hypernuclei 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 and the main (anti-)hypernucleus to study at the LHC.
Nevertheless, there are heavier hypernuclei which production yields are suppressed with respect to the (anti-)hypertriton. However, they could give further insights into the formation mechanism and the nature of the Y-N or Y-Y interaction. Recent measurements revealed excited states for two mass A=4 (anti-)hypernuclei which make their measurement become feasible. These (anti-)hypernuclei decay weakly after a few centimeters into two or more daughter particles and are reconstructed by their decay products. With the excellent performance of the ALICE apparatus, a clear particle identification of the daughters and a precise reconstruction of the decay vertex is possible.
We will present new results on the measurement of (anti-)hypernuclei within the A=4 mass region, namely the hyperhydrogen-4 and the hyperhelium-4. Furthermore, first insights into the measurement of double-strange (anti-)hypernuclei will be shown.