Mainz 2022 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 27: Instrumentation VIII
HK 27.2: Vortrag
Dienstag, 29. März 2022, 16:30–16:45, HK-H4
Application of TRD Trigger on the Hypertriton Analysis in p–Pb collisions at ALICE — •Benjamin Brudnyj for the ALICE collaboration — Institut für Kernphysik, Goethe Universität, Frankfurt am Main
The production of light (anti-)(hyper-)nuclei has recently become a topic of high interest. One interesting example is the lifetime of the lightest hypernucleus, the hypertriton. Several measurements indicate a significant deviation from the theoretical expectation, in particular in heavy-ion collisions. Therefore, it is important to also measure these rare nuclei in pp and p–Pb collisions.
Due to their short lifetime only their decay products can be measured, e.g. the charged two body decay channel Λ3H →3He + π−. In order to be able to measure these rare (anti-)fragments also in pp and p–Pb collisions, a trigger on nuclei was implemented on p–Pb collisions at √sNN = 8.16 TeV to increase the statistics by using the ability of the ALICE-TRD to perform fast trigger decisions.
In this talk the performance of a trigger on different light nuclei will be presented, as well as the current status of a hypertriton analysis using data on p–Pb collisions at √sNN = 8.16 TeV. In order to measure the hypertriton with a sufficient significance and a good signal-to-background ratio, a study to optimize topological cuts is performed. Supported by BMBF and the Helmholtz Association.