Production of 4He and 4H̅e in Pb–Pb collisions at √sNN = 2.76 TeV at the LHC

Acharya, S. and Antičić, Tome and Erhardt, Filip and Gotovac, Sven and Jerčić, Marko and Lončar, Petra and Mudnić, Eugen and Planinić, Mirko and Poljak, Nikola and Simatović, Goran and Utrobičić, Antonija and Vicković, Linda and Zou, S. (ALICE Collaboration) (2018) Production of 4He and 4H̅e in Pb–Pb collisions at √sNN = 2.76 TeV at the LHC. Nuclear Physics A, 971. pp. 1-20. ISSN 0375-9474

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Abstract

Results on the production of 4He and 4He nuclei in Pb–Pb collisions at √sNN = 2.76 TeV in the rapidity range | y |< 1, using the ALICE detector, are presented in this paper. The rapidity densities corresponding to 0–10% central events are found to be dN/dy4He = (0.8 ± 0.4 (stat) ± 0.3 (syst)) × 10−6 and dN/dy4_H̅e = (1.1 ± 0.4 (stat) ± 0.2 (syst)) × 10−6, respectively. This is in agreement with the statistical thermal model expectation assuming the same chemical freeze-out temperature (Tchem = 156 MeV) as for light hadrons. The measured ratio of 4H̅e/4He is 1.4 ± 0.8 (stat) ± 0.5 (syst).

Item Type: Article
Keywords: Pb–Pb collisions, ALICE detector, LHC, anti-nuclei
Date: 2018
Subjects: NATURAL SCIENCES > Physics
Additional Information: © 2018 Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Received 26 October 2017, Revised 20 December 2017, Accepted 21 December 2017, Available online 27 December 2017.
Divisions: Faculty of Science > Department of Physics
Publisher: Elsevier
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 11 Sep 2018 10:23
Last Modified: 11 Sep 2018 10:23
URI: http://digre.pmf.unizg.hr/id/eprint/5846

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