Light (anti)nuclei production in Pb-Pb collisions at <math><mrow><msqrt><msub><mi>s</mi><mrow><mi>N</mi><mi>N</mi></mrow></msub></msqrt><mo>=</mo><mn>5.02</mn><mo> </mo><mi>TeV</mi></mrow></math> - INSPIRE

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Light (anti)nuclei production in Pb-Pb collisions at $\sqrt{s_{N N}} = 5.02 TeV$

ALICE

Collaboration

Nov 25, 2022

24 pages

Published in:

Phys.Rev.C 107 (2023) 6, 064904

Published: Jun 8, 2023

e-Print:

2211.14015 [nucl-ex]

DOI:

10.1103/PhysRevC.107.064904 (publication)

Report number:

CERN-EP-2022-263

Experiments:

CERN-LHC-ALICE

View in:

reference search31 citations

Citations per year

Abstract: (APS)

The measurement of the production of deuterons, tritons and

{}^{3}{He}

and their antiparticles in Pb-Pb collisions at

\sqrt{s_{N N}} = 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_{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 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.

Note:

24 pages, 7 captioned figures, authors from page 19, published version, figures at http://alice-publications.web.cern.ch/node/8656

heavy ion: scattering
nucleus: production
deuteron: production
nucleus: wave function
hadronization: statistical
hadronization: model
model: coalescence
baryon number: conservation law
p: yield
multiplicity: low

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