首页|Production characteristics of light nuclei, hypertritons and
$\Omega$-hypernuclei in Pb+Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV
Production characteristics of light nuclei, hypertritons and
$\Omega$-hypernuclei in Pb+Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV
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Arxiv
We extend an analytical nucleon coalescence model with hyperons to study
productions of light nuclei, hypertritons and $\Omega$-hypernuclei in Pb+Pb
collisions at $\sqrt{s_{NN}}=5.02$ TeV. We derive the formula of the momentum
distribution of two bodies coalescing into dibaryon states and that of three
bodies coalescing into tribaryon states. We explain the available data of the
coalescence factors $B_2$ and $B_3$, the transverse momentum spectra, the
averaged transverse momenta, the yield rapidity densities, yield ratios of the
deuteron, antihelium-3, antitriton, hypertriton measured by the ALICE
collaboration, and give predictions of different $\Omega$-hypernuclei, e.g.,
$H(p\Omega^-)$, $H(n\Omega^-)$ and $H(pn\Omega^-)$. We find two groups of
interesting observables, the averaged transverse momentum ratios of light
(hyper-)nuclei to protons (hyperons) and the centrality-dependent yield ratios
of theirs. The former group exhibits a reverse-hierarchy of the nucleus size,
and the latter is helpful for the judgements of the nucleus production
mechanism as well as the nucleus own size.
Jun Song、Feng-Lan Shao、Rui-Qin Wang、Xin-Lei Hou、Yan-Hao Li
Arxiv
