论文标题
从RHIC的Star实验中粒子产生和集体的系统尺寸依赖性
System size dependence of particle production and collectivity from the STAR experiment at RHIC
论文作者
论文摘要
小碰撞系统中粒子光谱的中等修改和集体的起源是重型离子社区中广泛争议的主题。为了解决这些开放的问题，我们建议研究各种系统尺寸的粒子生产和集体性，Au+au+$> $> $> $> $> $+ru/zr+zr $> $> $> $> $> $> $> $> $ d+au $> $> $ $> $ $umγ$γ$+au，可在RHIC上使用STAR DTECTOCTOR提供。我们介绍了依赖中心性在Isobar（Ru+Ru和Zr+Zr）碰撞的中心性强力生产的第一个测量，包括高横向动量的核修饰因子（$ R_ \ Mathrm {aa} $）（$ p_ \ p_ \ mathrm {t} $），以及在低$ p_ p_ $ p_ \ math $ p_} $ p _}的识别粒子光谱处。结合其他系统的现有结果，它们探测了介质修饰对颗粒产生的系统大小和碰撞几何依赖性。此外，我们介绍了使用RHIC的超外外AU+AU碰撞的$γ$+AU事件中粒子产生和远程二二体相关性的测量。
Medium modification of particle spectra and the origin of collectivity in small collision systems are widely debated topics in the heavy-ion community. To address these open questions, we propose the study of particle production and collectivity for varying system sizes,Au+Au $>$ Ru+Ru/Zr+Zr $>$ Cu+Cu $>$ d+Au $>$ $γ$+Au, available at RHIC using the STAR detector. We present the first measurements of centrality dependent charged hadron production in Isobar (Ru+Ru and Zr+Zr) collisions, including the nuclear modification factors ($R_\mathrm{AA}$) at high transverse momentom ($p_\mathrm{T}$), and identified particle spectra at low $p_\mathrm{T}$\ at mid-rapidity. Combined with existing results from other systems, they probe system size and collision geometry dependences of the medium modification to particle production. In addition, we present the measurement of particle production and long-range di-hadron correlations in $γ$+Au events using ultra-peripheral Au+Au collisions at RHIC.
