Given the RHIC kinematics, gluon saturation is not expected to play a significant role, so the observed large nuclear suppression suggests additional effects, such as nuclear shadowing. Indeed, the Leading Twist Approximation nuclear shadowing model provides a better fit to the data, particularly for coherent J/ψ production.

2025年1月30日 · A dedicated fixed-target program pushed RHIC’s center-of-mass energies down to energies of only 3GeV. Our Cold QCD and spin research are integral to STAR’s physics program. A concerted effort by the collaboration resulted in forward detection capability through four new detectors first used in the 2022 proton-proton collisions.

2024年5月24日 · The STAR detector specializes in tracking the thousands of particles produced by each ion collision at RHIC. Weighing 1,200 tons and as large as a house, STAR is a massive detector. It is used to search for signatures of the form of matter that RHIC was designed to create: the quark-gluon plasma (QGP).

2012年4月24日 · RHIC is the world's only machine capable of colliding beams of polarized protons to investigate the 'missing' spin of the proton. Before high-speed packets of heavy ions can be brought into collisions with one another, they first …

STAR is designed to search for signatures of quark-gluon plasma formation and to investigate the behavior of strongly interacting matter at high energy density. The emphasis is on the measurement and correlation of global observables on an event-by-event basis and the use of hard scattering of partons to probe the properties of high density ...

1 天前 · RHIC’s STAR detector has been operational since RHIC’s beginning, with many upgrades culminating in 2022. Since then, its goals have been steady, including capturing as much data as possible from 200 GeV gold-gold collisions. “From Runs 23 and 24, we collected 8 billion high-quality gold-gold collision events, and we aim to collect an additional 10 billion events this year,” said ...

工程物理系是RHIC 上的螺旋形径迹探测器（STAR）国际合作组成员，自2001 年始，我们采用多气隙阻性板室（MRPC）技术为STAR 先后建造了大型飞行时间探测器（TOF）和新型缪子探测器（MTD）。 整个TOF 的时间分辨达到80ps，性能优良，运行稳定，大大提高了高动量区的粒子鉴别能力。 MTD 将是STAR...

STAR 是运行在 RHIC 上的大型综合性实验装置，其主要物理任务之一是研究 QGP 的性质，以及研究核物质从 QGP 相到普通强子物质相的转变（ QCD 相结构）。 STAR 实验国际合作组已在《 Nature 》《 Science 》《 Phys. Rev. Lett. 》等期刊 发表多项重要成果。 RHIC-STAR 探测器

1 天前 · STAR goals for Run 25. RHIC’s STAR detector has been operational since RHIC’s beginning, with many upgrades culminating in 2022. Since then, its goals have been steady, including capturing as ...

STAR will search for signatures of QGP formation and investigate the behavior of strongly interacting matter at high energy density in central collisions of relativistic nuclei. The STAR detector system will simultaneously measure many experimental observables to study signatures of the QGP phase transition as well as the space­