MEASUREMENT OF GLOBAL SPIN ALIGNMENT OF VECTOR MESONS AT RHIC

被引：2
|
作者：
Singha, Subhash [1 ]
机构：
[1] Chinese Acad Sci, Inst Modern Phys, Lanzhou 73000, Peoples R China
来源：
ACTA PHYSICA POLONICA B PROCEEDINGS SUPPLEMENT | 2023年 / 16卷 / 01期
关键词：
D O I：
10.5506/APhysPolBSupp.16.1-A34
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report on the measurements of spin alignment (rho(00)) for K*0, (K*0) over bar, K*(+), and K*- vector mesons in the RHIC isobar collisions (Zr+Zr and Ru+Ru) at root s(NN) = 200 GeV. We observe the first non-zero spin alignment for K*(+/-) in heavy-ion collisions. The K*(+/-) rho(00) is about 3.9 sigma larger than that of K*(0). The observed difference and the ordering between K*(+/-) and K*(0) are surprising and require further inputs from theory. When comparing the isobar and Au+Au collisions, no significant system size dependence in K*(0) rho(00) is observed within uncertainties.
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页数：6
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