Bonn 2020 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 43: Heavy-Ion Collisions and QCD Phases X

HK 43.2: Vortrag

Donnerstag, 2. April 2020, 14:30–14:45, J-HS F

Investigations on light (anti-)hypernuclei with ALICE 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 excellent performance of the Inner Tracking System, the Time Projection Chamber and the Time-Of-Flight detector of the ALICE apparatus provide a clear particle identification and vertex reconstruction. ALICE is currently performing its upgrade of the detector setup to cope with the interaction rate of 50 kHz in Pb–Pb collisions in Run 3. This will lead to an even larger sample of light (anti-)(hyper-)nuclei. These (anti-)
(hyper-)nuclei are reconstructed by their decay products, e.g. in the charged two-body decay channel of the lightest known (anti-)(hyper-)
nucleus Λ3H3H + π. In order to predict the yields of the (anti-)
Λ3H and also (double-)(anti-)(hyper-)nuclei of mass number A=4 and A=5, it is essential to study the acceptance and efficiency in Monte Carlo simulations. For the measurement, a magnetic field is needed and currently by default set to B = 0.5 T. We show, that a lower value of the magnetic field provides a better reconstruction efficiency of (anti-)(hyper-)nuclei. In addition, we present the status of our new investigations on the ΛΛ4H with Run 2 Data.

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