München 2019 – wissenschaftliches Programm
HK 54.18: Poster
Donnerstag, 21. März 2019, 16:30–19:00, Foyer Theresanium
Investigations on light (ant-)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 excellent performance of the Inner Tracking System, the Time Projection Chamber and the Time-Of-Flight detector of the ALICE apparatus provide a clear identification and separation of primary produced light (anti-)nuclei from secondaries. ALICE is currently starting its upgrade of the detector setup to cope with the interaction rate of 50 kHz in Pb–Pb collisions. This will lead to an even larger sample of light (anti-)(hyper-)nuclei. One object to study is the hypertriton - a bound state of a proton, a neutron and a Λ hyperon. It is reconstructed by reconstructing its decay products, e.g. in the charged two-body decay channel Λ3H → 3He + π−. In order to predict the yields of the (anti-)hypertriton and also (double-)(anti-)(hyper-)hypernuclei of mass number A=4 and A=5, it is essential to study the acceptance x efficiency in Monte Carlo simulations. The investiagted decay channel channels are: Λ5He → 4He + p +π−, Λ5He → 3He + d + π−, Λ4He → 3He + p + π−, Λ4H → 4He + π−, Λ4H → t + p + π− and ΛΛ4H → Λ4He + π−. We will present the status of the investigations of these (double-)(anti-)(hyper-)hypernuclei.