标题： 铅-铅碰撞中轻核子、超氚和$Ω$- 超核的产生特性在$\sqrt{s_{NN}}=5.02$TeV 下 显示英文标题

标题： Production characteristics of light nuclei, hypertritons and $Ω$-hypernuclei in Pb+Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV

摘要： 我们扩展了一个包含超子的核聚合理论模型，用于研究 Pb+Pb 能量为$\sqrt{s_{NN}}=5.02$TeV 碰撞中轻核、超氚和$\Omega$超核的产生。 我们推导了两个粒子凝聚成双核子态以及三个粒子凝聚成三核子态的动量分布公式。 我们解释了由ALICE合作组测量的结合因子$B_2$和$B_3$的可用数据、横向动量谱、平均横向动量、产额快度密度、氘、反氦-3、反氚和超氚的产额比，并给出了不同$\Omega$超核的预测，例如： $H(p\Omega^-)$、$H(n\Omega^-)$和$H(pn\Omega^-)$。 我们发现了两类有趣的可观测量：轻（超）核与质子（超子）的平均横向动量比，以及它们随中心度变化的产额比。前者表现出核大小的逆层次结构，而后者有助于判断核的产生机制以及核本身的大小。 显示英文摘要

摘要： 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.