论文标题
高能量PP碰撞中向量介子的自旋对齐
The Spin Alignment of Vector Mesons in High Energy pp Collisions
论文作者
论文摘要
在高能反应中产生的向量中膜的自旋比对由旋转依赖性的片段化函数$ d_ {1ll}（z，μ_f）$确定，该函数被证明与碎片夸克的极化无关。在本文中，我们从$ e^+e^ - $ e^+e^ - $ e^+e^ - $ e^+e^ - $ e^+e^ - $ e^ - $ nihihilation in Lep中的$ k^{*0} $中的数据中提取$ d_ {1ll}（z，μ_f）$ $ d_ {1ll}（z，μ_f）$。我们对不同子过程的贡献进行了详细的分析，并表明旋转对齐在高能$ pp $碰撞中也应该非常重要。
The spin alignment of vector meson produced in high energy reactions is determined by the spin-dependent fragmentation function $D_{1LL} (z,μ_f)$ that is shown to be independent of the polarization of the fragmenting quark. In this paper, we extract the spin-dependent fragmentation function $D_{1LL} (z,μ_f)$ from data on the spin alignment of $K^{*0}$ in $e^+e^-$ annihilation at LEP in two different scenarios and apply them to make predictions in $pp$ collisions. We make detailed analysis of contributions from different sub-processes and show that the spin alignment should be quite significant also in high energy $pp$ collisions.
