论文标题
揭示相对论重离子碰撞中核合成的动力学
Unveiling the dynamics of nucleosynthesis in relativistic heavy-ion collisions
论文作者
论文摘要
像早期宇宙期间的核合成一样，在相对论的重离子碰撞中也会产生光核。 Although the deuteron ($d$) yields in these collisions can be well described by the statistical hadronization model (SHM), which assumes that particle yields are fixed at a common chemical freezeout near the phase boundary between the quark-gluon plasma and the hadron gas, the recently measured triton ($^3\text{H}$) yields in Au+Au collisions at $ \ sqrt {s_ {nn}} = 7.7-200 $ GEV被该模型系统地高估了。在这里，我们开发了一种全面的动力学方法来研究Hadronic重新分散的效果，例如$πnn\leftrightArrowπd$和$πnnn\leftrightArrowπ^3 \ text {h}〜（h}〜（^3 \ text {he}）$碰撞。我们发现，这些反应对杜特隆的产量几乎没有影响，但减少了$^3 \ text {h} $和$^3 \ text {he} $的收益率从SHM给出的初始值中提高了约1.8。这一发现有助于解决SHM中Triton生产的高估，并为相对论重离子碰撞中的核合成作用提供了望元重新分散作用的证据。
Like nucleosynthesis during the early universe, light nuclei are also produced in relativistic heavy-ion collisions. Although the deuteron ($d$) yields in these collisions can be well described by the statistical hadronization model (SHM), which assumes that particle yields are fixed at a common chemical freezeout near the phase boundary between the quark-gluon plasma and the hadron gas, the recently measured triton ($^3\text{H}$) yields in Au+Au collisions at $\sqrt{s_{NN}}=7.7-200$ GeV are overestimated systematically by this model. Here, we develop a comprehensive kinetic approach to study the effects of hadronic re-scatterings, such as $πNN\leftrightarrowπd$ and $πNNN\leftrightarrowπ^3\text{H}~(^3\text{He})$, on $d$, $^3\text{H}$, and $^3\text{He}$ production in these collisions. We find that these reactions have little effects on the deuteron yield but reduce the $^3\text{H}$ and $^3\text{He}$ yields by about a factor of 1.8 from their initial values given by the SHM. This finding helps resolve the overestimation of triton production in the SHM and provides the evidence for hadronic re-scattering effects on nucleosynthesis in relativistic heavy-ion collisions.
