高自旋粒子的自旋密度矩阵
Spin density matrix for high-spin particles
- Tsinghua University（清华大学）
- University of Washington（华盛顿大学）
机构由 AI 辅助整理，请以论文原文为准。
中文总结 AI 辅助
本文针对高自旋粒子，讨论宇称守恒下自旋密度矩阵（SDM）的性质，给出自旋-1、自旋-2粒子的SDM参数化形式，提供其在衰变过程角分析中的应用实例，可辅助实验数据分析。
中文摘要 AI 辅助
自旋密度矩阵（SDM）表征粒子的自旋态，为理解其产生机制提供重要信息。本文讨论宇称守恒下SDM的一般性质，给出符合所有预期约束的自旋-1和自旋-2粒子的特定SDM参数化形式；SDM的虚部（实部）与奇秩（偶秩）极化度相关，同时给出自旋-1和自旋-2情形的具体表达式。文中还提供SDM在多个具有不同自旋-宇称假设的衰变过程角分析中的应用实例，可用于辅助实验数据分析。
英文摘要
The spin density matrix (SDM) characterizes the spin state of a particle, which provides important information for understanding its production mechanism. A general discussion of the SDM under parity conservation, and specific SDM parameterizations for spin-1 and spin-2 particles are provided, which respect all the expected constraints. The imaginary (real) part of SDM is related to the degree of odd-rank (even-rank) polarization, with specific expressions given for spin-1 and spin-2 cases. Examples of applications of the SDM to angular analyses of several decay processes with different spin-parity hypotheses are also provided, which could be helpful in experimental data analyses.
