首页|Light (anti)nuclei production in Pb-Pb collisions at
$\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
Light (anti)nuclei production in Pb-Pb collisions at
$\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
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Arxiv
The measurement of the production of deuterons, tritons and $^{3}\mathrm{He}$
and their antiparticles in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}} = 5.02$
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 $p_{\rm T}$-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 centre-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.
Arxiv
