Here we develop a new strategy to analyze the chemical freeze-out of light (anti)nuclei produced in high energy collisions of heavy atomic nuclei within an advanced version of the hadron resonance gas model. It is based on two different, but complementary approaches to model the hard-core repulsion between the light nuclei and hadrons. The first approach is based on an approximate treatment of the equivalent hard-core radius of a roomy nuclear cluster and pions, while the second approach is rigorously derived here using a self-consistent treatment of classical excluded volumes of light (anti)nuclei and hadrons. By construction, in a hadronic medium dominated by pions, both approaches should give the same results. Employing this strategy to the analysis of hadronic and light (anti)nuclei multiplicities measured by ALICE at \(\sqrt{s_{NN}} =2.76\) TeV and by STAR at \(\sqrt{s_{NN}} =200\) GeV, we got rid of the existing ambiguity in the description of light (anti)nuclei data and determined the chemical freeze-out parameters of nuclei with high accuracy and confidence. At ALICE energy the nuclei are frozen prior to the hadrons at the temperature \(T = 175.1^{+2.3}_{-3.9}\) MeV, while at STAR energy there is a single freeze-out of hadrons and nuclei at the temperature \(T = 167.2 \pm 3.9\) MeV. We argue that the found chemical freeze-out volumes of nuclei can be considered as the volumes of quark-gluon bags that produce the nuclei at the moment of hadronization.

在这里，我们开发了一种新策略，用于分析强子共振气体模型的高级版本中重原子核高能碰撞中产生的轻（反）核的化学冻结。它基于两种不同但互补的方法来模拟轻核与强子之间的硬核排斥。第一种方法是基于对宽敞核簇和介子的等效硬核半径的近似处理，而第二种方法是使用经典排除体积的轻（反）核和强子的自洽处理严格地得出。 。通过构造，在以介子为主导的强子介质中，两种方法应给出相同的结果。采用这种策略来分析ALICE在2000年对强子和轻（反）核多重性的分析\（\ sqrt {s_ {NN}} = 2.76 \） TeV，并通过STAR在\（\ sqrt {s_ {NN}} = 200 \） GeV处，我们摆脱了对光（反）的描述中存在的歧义。核数据，并以高准确度和置信度确定了核的化学冻结参数。在ALICE能量处，原子核先于强子被冻结，温度为（（T = 175.1 ^ {+ 2.3} _ {-3.9} \） MeV，而在STAR能量中，核中的强子和原子核被单次冻结。温度\（T = 167.2 \ pm 3.9 \） MeV。我们认为发现的原子核化学冻结体积可以看作是强子化时产生核的夸克-胶子袋的体积。