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 16.2: Vortrag
Dienstag, 21. März 2023, 17:30–17:45, SCH/A216
Pining down the (anti-)hypertriton production with ALICE at the LHC — •Michael Hartung for the ALICE Germany collaboration — Institut für Kernphysik, Goethe-Universität, Frankfurt, Germany
At the Large Hadron Collider at CERN, copious production of light (anti-)hypernuclei has been measured in Pb–Pb collisions by the ALICE collaboration. The production of such (anti-)hypernuclei has recently become a topic of high interest, in particular since the properties of these objects are not measured to high precision.
The most prominent example is the (anti-)hypertriton, which is a bound state of a proton, a neutron and a Λ hyperon. It is often discussed as a bound state of a deuteron and a Λ hyperon. If one uses the known Λ separation energy of the hypertriton (about 130 keV) one can estimate a size of about 10 fm of the state, which would be larger as a lead nucleus. The size has consequences for its probability to be formed in a coalescence process, which is not expected from a statistical-thermal model approach.
The (anti-)hypertriton is reconstructed by its decay products, e.g. in the case for the charged two-body decay channel of the hypertriton: Λ3H → 3He + π−.
We will show the latest measurement of the (anti-)hypertriton production in different collision systems and a comparison to different production models. Furthermore, we will present a novel technique for the determination of the object size of the (anti-)hypertriton.