Mainz 2022 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 36: Heavy-Ion Collisions and QCD Phases VIII
HK 36.5: Vortrag
Mittwoch, 30. März 2022, 15:15–15:30, HK-H2
Study of the production mechanism of light nuclei in small systems at the LHC with ALICE — •Luca Barioglio1 and Michael Habib2, 3 for the ALICE collaboration — 1Technische Universität München, Garching bei München, Deutschland — 2GSI, Darmstadt, Deutschland — 3Technische Universität Darmstadt, Darmstadt, Deutschland
At the LHC, an abundant production of light (anti)nuclei is observed in all collision systems and at all energies. However, their production mechanism is still under debate in the scientific community. The ALICE Collaboration has recently published the measurement of the production of (anti)deuteron and (anti)helion in pp collisions at √s = 5 TeV and at √s = 13 TeV.
In this presentation, the measurement of the coalescence parameter BA, both as a function of transverse momentum and as a function of multiplicity, and the measurement of the yield-ratios of nuclei and protons as a function of multiplicity will be shown. In particular, BA as a function of the transverse momentum is, for the first time, compared with theoretical predictions which take into account both the nuclear wave function and the dependence on the size of the emitting source.