论文标题
PB+PB碰撞中的HADRONIC $ J/ψ$再生
Hadronic $J/ψ$ Regeneration in Pb+Pb Collisions
论文作者
论文摘要
我们利用Alice的PB+PB碰撞中出版的收益率和$ J/ψ$在Alice的PB+PB碰撞中，以及对强子气体扩展的示意图描述，以研究$ D $ -Meson碰撞，作为在大型Hadron Collisions Collisisions Charmon的生产机制中，在Hadronic Breakin collisions中，在大型Hadron Collider中。我们的计算基于与热横截面的化学反应速率，以在伪尺度和载体介子之间有效的介子相互作用。我们发现，由于再生，新近测量的$ j/ψ$收益率与大约25美元\％$至$ 110 \％$ $ $ $ j/ψ$的收益率是一致的。这使我们能够在强调后立即绑定$ j/ψ$的分数丰度：$ 0.28 \ leq \ frac {dn_0^{j/ψ}/dy} {dn _ {\ rm eq}^{\ rm eq}^{在我们的示意图描述的细节的放松下，我们的结果是可靠的，这意味着很难通过最终状态耐药的耐药性耐药的态度来区分强环与再生的再生。因此，建模时必须考虑再生。
We make use of published yields for $D$-mesons and $J/ψ$ in Pb+Pb collisions at ALICE and a schematic description of the expansion of the hadron gas to study $D$-meson collisions during the hadronic break-up phase as a production mechanism for charmonium in relativistic heavy ion collisions at the Large Hadron Collider. Our calculation is based on chemical reaction rates with thermal cross sections for an effective meson interaction among pseudoscalar and vector mesons. We find that due to regeneration, the newly measured $J/ψ$ yields are consistent with anywhere from roughly $25\%$ to $110\%$ of the total yield present at hadronization time. This allows us to bound the fractional abundance of $J/ψ$ immediately after hadronization: $0.28 \leq \frac{dN_0^{J/ψ}/dy}{dN_{\rm eq}^{J/ψ}/dy} \leq 1.13$. Our results are robust under the relaxation of the particulars of our schematic description and imply that it will be difficult to distinguish regeneration during hadronization from regeneration by final-state hadronic interactions. Therefore, regeneration must be taken into account when modelling.
