Vector meson’s spin alignments in high energy reactions  

作　　者：Jin-Hui Chen Zuo-Tang Liang Yu-Gang Ma Xin-Li Sheng Qun Wang 

机构地区：[1]Key Laboratory of Nuclear Physics and Ion-beam Application(MoE),Institute of Modern Physics,Fudan University,Shanghai 200433,China [2]Institute of Frontier and Interdisciplinary Science,Key Laboratory of Particle Physics and Particle Irradiation(MOE),Shandong University,Qingdao 266237,China [3]INFN-Firenze,Sesto Fiorentino FI 50019,Italy [4]Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China [5]School of Mechanics and Physics,Anhui University of Science and Technology,Huainan 232001,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2025年第1期1-16,共16页中国科学:物理学、力学、天文学(英文版)

基　　金：supported in part by the National Key Research and Development Program of China(Grant No.2022YFA1604900);the National Natural Science Foundation of China(Grant Nos.12025501,11890710,11890713,11890714,12147101,and 12135011);the Strategic Priority Research Program of the Chinese Academy of Sciences(CAS)(Grant No.XDB34030102);the Natural Science Foundation of Shandong Province。

摘　　要：The global spin alignment of vector mesons has been observed by the STAR collaboration at the Relativistic Heavy Ion Collider(RHIC)at Brookhaven National Laboratory(BNL).It provides a unique opportunity to probe the correlation between the po-larized quark and antiquark in the strongly coupled quark-gluon plasma(sQGP)produced in relativistic heavy ion collisions,opening a new window to explore the properties of sQGP.In addition,spin alignments of vector mesons have also been observed in other high-energy particle collisions such as e^(+)e^(−)annihilations at high energies where hadron production is dominated by quark fragmentation mechanism.The results obtained are quite different from those obtained in heavy ion collisions where quark coalescence/combination mechanism dominates suggesting strong dependence on hadronization mechanisms.So comprehensive studies in different hadronization processes are needed.In this article,we present a brief review of theoretical and experimen-tal advances in the study of vector meson’s spin alignments in a variety of high-energy particle collisions,with emphasis on hadronization mechanisms.

关 键 词：vector meson spin alignment global polarization relativistic heavy ion collisions FRAGMENTATION 

分 类 号：O57[理学—粒子物理与原子核物理]