Frankfurt 2014 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 63: Schwerionenkollisionen und QCD Phasen
HK 63.3: Vortrag
Freitag, 21. März 2014, 14:30–14:45, HZ 6
Search for the Λ n bound state and the H-dibayron in √sNN = 2.76 TeV Pb–Pb collisions with ALICE at the LHC — •Nicole Martin for the ALICE collaboration — Research Division and ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung, Planckstr. 1, 64291 Darmstadt — Institut für Kernphysik, Technische Universität Darmstadt, Schlossgrabenstr. 9, 64289 Darmstadt
ALICE is the experiment at the CERN LHC dedicated to the investigation of nucleus–nucleus collisions at the highest energies ever reached in the laboratory. The excellent particle identification capabilities and the ultralow momentum reach of ALICE allow for the reconstruction of a significant number of rare states or even exotic ones. In this talk we present results from a sample of Pb–Pb collisions at √sNN = 2.76 TeV. Particles as well as the corresponding anti-particles have been identified based on their specific energy loss in the Time Projection Chamber and velocity information from the Time-Of-Flight detector. The Inner Tracking System allows a precise determination of the collision vertex. Therefore primary and secondary particles can be well separated. This helps for example in the search for lighter exotic hyper-matter states, i.e. Λ-Λ (also known as H-dibaryon) and Λn bound states. We present here the search for a possible Λn bound state decaying into a deuteron and a pion and for the H-dibaryon decaying into Λ, proton and pion. The results are compared with model calculations.