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

Acharya S., Adamová D., Adolfsson J., Aggarwal M., Aglieri Rinella G., Agnello M., ...More

Nuclear Physics A, vol.971, pp.1-20, 2018 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 971
  • Publication Date: 2018
  • Doi Number: 10.1016/j.nuclphysa.2017.12.004
  • Journal Name: Nuclear Physics A
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1-20
  • Keywords: ALICE detector, Anti-nuclei, LHC, Pb–Pb collisions
  • Yıldız Technical University Affiliated: No


Results on the production of 4He and He‾4 nuclei in Pb–Pb collisions at sNN=2.76TeV 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/dyHe4=(0.8±0.4(stat)±0.3(syst))×10−6 and dN/dyHe‾4=(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=156MeV) as for light hadrons. The measured ratio of He‾4/4He is 1.4±0.8(stat)±0.5(syst).