Heidelberg 2015 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 53: Heavy Ion Collisions and QCD Phases 6
HK 53.1: Gruppenbericht
Donnerstag, 26. März 2015, 14:30–15:00, T/HS1
(Anti-)nuclei production and exotica searches with ALICE at the LHC — •Benjamin Dönigus for the ALICE collaboration — Institut für Kernphysik, Goethe Universität Frankfurt, Frankfurt, Germany
The high collision energies reached at the LHC lead to significant production yields of light anti- and hyper-nuclei in proton-proton and, in particular, Pb-Pb collisions. The excellent particle identification capabilities from the Time Projection Chamber, using the specific energy loss (dE/dx), and the time-of-flight measurement, allow for the detection of these rarely produced particles. Further the Inner Tracking System gives the possibility to seperate primary nuclei from those coming from the decay of heavier systems. This altogether offers the unique opportunity to search for exotica like the bound state of a Λ and a neutron which would decay into deuteron and pion, or the bound state of two Λs, and also allows for the topological identification of the hyper-triton via its mesonic decay (Λ3H → 3He + π).
In this group report we will show results for (anti-)deuterons, (anti-)tritons, (anti-)3He and (anti-)4He and give an overview on the ongoing searches. The results will also be compared with the expectations from thermal and coalescence models.