AI 中文总结
研究用EPOS4模型通过UrQMD方法模拟强子末态相互作用，对比有、无该方法时的计算，评估其对共振产生的影响，分离再生和再散射贡献，分析多种共振及不同碰撞系统，揭示强子相互作用在小碰撞系统中起重要作用。
AI 中文摘要
近期高多重质子-质子碰撞实验结果表明可能出现集体行为和类似介质的效应。共振产生是此类效应的灵敏探针。本研究用EPOS4事件发生器，通过UrQMD传输方法模拟强子末态相互作用，对比有、无UrQMD的计算评估强子相互作用对共振产生的影响，分离UrQMD贡献为再生和再散射，对多种共振进行分析并扩展到其他碰撞系统研究强子相效应的系统大小依赖性。结果表明共振产生受再生和再散射竞争支配，其相对重要性取决于共振种类、横向动量和碰撞系统。再散射抑制可重建的短寿命共振信号，再生能显著提高多种共振产率，特别是重子共振。这些发现表明强子相互作用在小碰撞系统中也起重要作用， highlight the need to measure resonances with different lifetimes and quantum numbers to constrain the dynamics and lifetime of the hadronic phase across collision systems.
英文摘要
Recent experimental results in high-multiplicity proton-proton (pp) collisions have suggested the possible emergence of collective behavior and medium-like effects previously considered characteristic of heavy-ion collisions. Resonance production provides a sensitive probe of such effects, as resonance yields and transverse-momentum distributions can be modified by hadronic interactions occurring between chemical and kinetic freeze-out. In this study, these effects are investigated using the EPOS4 event generator, in which hadronic final-state interactions are modeled through the UrQMD transport approach. By comparing calculations performed with and without UrQMD, the impact of hadronic interactions on resonance production is evaluated. In addition, the UrQMD contributions are separated into regeneration and rescattering, enabling a detailed investigation of both resonance production enhancement and the loss of reconstructible resonance signals. The analysis is performed for various mesonic and baryonic resonances with different lifetimes in pp collisions at LHC energies and is extended to p-O, O-O, and Pb-Pb collisions to study the system-size dependence of hadronic-phase effects. The results show that resonance production is governed by the competition between regeneration and rescattering, whose relative importance depends strongly on the resonance species, transverse momentum, and collision system. While rescattering suppresses reconstructible short-lived resonance signals, regeneration can significantly enhance the yields of several resonance species, particularly baryonic resonances. These findings demonstrate that hadronic interactions can play an important role even in small collision systems and highlight the need to measure resonances with different lifetimes and quantum numbers to constrain the dynamics and lifetime of the hadronic phase across collision systems.
Comments15 pages, 11 figures
