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Anti- and Hyper-Nuclei Production at the LHC with ALICE

, on behalf of the ALICE Collaboration
Department of Physics, Università degli Studi di Torino, via P. Giuria 1, 10125 Torino (TO), Italy
Presented at Hot Quarks 2018—Workshop for Young Scientists on the Physics of Ultrarelativistic Nucleus-Nucleus Collisions, Texel, The Netherlands, 7–14 September 2018.
Proceedings 2019, 10(1), 47; https://doi.org/10.3390/proceedings2019010047
Published: 7 May 2019
PDF [1069 KB, uploaded 7 May 2019]

Abstract

At the Large Hadron Collider (LHC) a significant production of (anti-)(hyper-)nuclei is observed in proton-proton (pp), proton-lead (p-Pb) and lead-lead (Pb-Pb) collisions. The measurement of the production yields of light (anti-)nuclei is extremely important to provide insight into the production mechanisms of nuclear matter, which is still an open question in high energy physics. The outstanding particle identification (PID) capabilities of the ALICE detectors allow the identification of rarely produced particles such as deuterons, 3 He and their antiparticles. From the production spectra measured for light (anti-)nuclei with ALICE, the key observables of the production mechanisms (antimatter/matter ratio, coalescence parameter, nuclei/protons ratio) are computed and compared with the available theoretical models. Another open question is the determination of the hypertriton lifetime: published experimental values show a lifetime shorter than the expected one, which should be close to that of the free Λ hyperon. Thanks to the high-resolution track reconstruction capabilities of the ALICE experiment, it has been possible to determine the hypertriton lifetime at the highest Pb-Pb collisions energy with the highest precision ever reached.
Keywords: nuclei; antinuclei; hypertriton lifetime nuclei; antinuclei; hypertriton lifetime
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Barioglio, L., , on behalf of the ALICE Collaboration; Anti- and Hyper-Nuclei Production at the LHC with ALICE. Proceedings 2019, 10, 47.

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