发表机构
Beihang University; Tsinghua University; RIKEN Nishina Center; Western Michigan University; National Superconducting Cyclotron Laboratory, Michigan State University（北京航空航天大学; 清华大学; 理化学研究所西村中心; 西密歇根大学; 密歇根州立大学国家超导回旋加速器实验室）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
研究在放射性束重离子碰撞中，利用SπRIT TPC进行飞秒测量。提出轨道合并与分裂校正方案，以270MeV/u的\(^{132}\text{Sn}+^{124}\text{Sn}\)系统为例应用校正，建立不确定度框架，证实该TPC用于飞秒测量的可行性，为高精度研究提供支持。
AI 中文摘要
飞秒测量是探索重离子碰撞中动态发射结构的有力工具，而放射性束重离子碰撞能研究极端同位旋条件下的核物质。本文利用SπRIT时间投影室成功进行飞秒测量，提出轨道合并与分裂的校正方案，适用于偶极磁体中的矩形TPC，有效改善小相对动量下的重建关联函数。以270MeV/u的\(^{132}\text{Sn}+^{124}\text{Sn}\)系统中质子-质子关联函数为例，成功应用校正，TPC角接受度影响可忽略，建立系统不确定度量化框架。实验结果证实SπRIT TPC用于飞秒测量的可行性，为高精度飞秒研究提供技术支持。
英文摘要
Femtoscopy is a powerful tool for exploring the dynamic emitting structure in heavy-ion collisions, while radioactive beam heavy-ion collisions enable the investigation of nuclear matter under extreme isospin conditions. Here, we successfully perform femtoscopy measurements using the S$π$RIT Time Projection Chamber (TPC). A dedicated correction scheme for track merging and splitting is proposed, which is well applicable to rectangular TPCs housed inside dipole magnets and effectively improves the reconstructed correlation functions at small relative momenta. Focusing on the proton-proton (p-p) correlation function in the 270 MeV/u $^{132}\text{Sn}+^{124}\text{Sn}$ system, we successfully apply the track merging and splitting correction; additionally, the TPC angular acceptance exhibits a negligible impact on the correlation function. A systematic uncertainty quantification framework is established. The experimental results of the p-p correlation function confirm the feasibility of the S$π$RIT TPC for femtoscopy measurements and provide technical support for high-precision femtoscopy studies using rectangular TPCs in radioactive beam heavy-ion collisions.
Comments9 pages, 10 figures
