Naslov
Light (anti)nuclei production in Pb-Pb collisions at √sNN= 5.02 TeV

Autori
Acharya, S. ; … ; Erhardt, Filip ; … ; Gotovac, Sven ; …. ; Jercic, Marko ; … ; Karatovic, David ; … ; Loncar, Petra ; … ; … ; Planinic, Mirko ; … ; Poljak, Nikola ; … ; Vickovic, Linda ; … ; Zurlo, N.

Kolaboracija
ALICE Collaboration

Izvornik
Physical review. C (2469-9985) 107 (2023), 6; 064904, 16

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
heavy ion, scattering ; model, coalescence ; p, yield ; multiplicity, low ; heavy ion: scattering ; nucleus: production ; deuteron: production ; nucleus: wave function ; hadronization: statistical ; hadronization: model ; model: coalescence ; baryon number: conservation law ; p: yield ; multiplicity: low ; suppression ; correlation ; anti-p ; fluctuation ; nucleosynthesis ; ALICE ; antiparticle ; fireball ; 5020 GeV-cms/nucleon

Sažetak
The measurement of the production of deuterons, tritons and 3He and their antiparticles in Pb-Pb collisions at √sNN = 5.02 TeV is presented in this article. The measurements are carried out at midrapidity (|y| <0.5) as a function of collision centrality using the ALICE detector. The pT- integrated yields, the coalescence parameters and the ratios to protons and antiprotons are reported and compared with nucleosynthesis models. The comparison of these results in different collision systems at different center-of-mass collision energies reveals a suppression of nucleus production in small systems. In the Statistical Hadronisation Model framework, this can be explained by a small correlation volume where the baryon number is conserved, as already shown in previous fluctuation analyses. However, a different size of the correlation volume is required to describe the proton yields in the same data sets. The coalescence model can describe this suppression by the fact that the wave functions of the nuclei are large and the fireball size starts to become comparable and even much smaller than the actual nucleus at low multiplicities.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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