论文标题
$ k^{*0} $和$ ϕ $ vector Meson的全局旋转对齐的测量
Measurement of global spin alignment of $K^{*0}$and $ϕ$ vector mesons using the STAR detector at RHIC
论文作者
论文摘要
我们报告横向动量（$ p _ {\ mathrm {t}} $）和$ k^{*0} $ k^{*0} $ k^{*0} $ vector meson的全局旋转对齐（$ρ_{00} $）的中心性依赖性（$ | y | <0.5 $）在RHIC的Star实验中200〜GEV。将$ k^{*0} $结果与$ ϕ $梅森的结果进行比较。在低 - $ p _ {\ mathrm {t}} $区域和中心碰撞时，发现$ k^{*0} $ $ $ρ_{00} $在1/3中大于1/3，而大约4 $σ$重要性，而$ ϕ $ MESON的$ 3 $ 3 $ 3 $ 3 $ 3 $ 3 $ 3 $ 3 $σ。在RHIC和LHC Energies之间比较了$ρ_{00} $结果。还讨论了我们的结果的物理含义。
We report the transverse momentum ($p_{\mathrm{T}}$) and centrality dependence of global spin alignment ($ρ_{00}$) of $K^{*0}$ vector meson at midrapidity ($|y|<0.5$) in Au + Au collisions at $\sqrt{s_{NN}}$ = 54.4 and 200~GeV with the STAR experiment at RHIC. The $K^{*0}$ results are compared to that of $ϕ$ meson. At low-$p_{\mathrm{T}}$ region and midcentral collisions, the $K^{*0}$ $ρ_{00}$ is found to be smaller than 1/3 with about 4$σ$ significance, while that of $ϕ$ meson is observed to be larger than 1/3 with about 3$σ$ significance. The $ρ_{00}$ results are compared between RHIC and LHC energies. The physics implication of our results is also discussed.
