磁场存在下的领头阶夸克-反夸克-W玻色子顶点
Leading order quark-antiquark-W-boson vertex in the presence of a magnetic field
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中文总结 AI 辅助
该研究计算了磁场下u夸克与反d夸克的夸克-反夸克-W玻色子顶点领头阶修正，确定了相关朗道能级跃迁选择规则，阐释了W玻色子偏振与夸克反夸克偏振的对应关系。
中文摘要 AI 辅助
我们计算了恒定均匀磁场存在下夸克-反夸克-W玻色子顶点的领头阶修正，具体针对夸克为u夸克、反夸克为反d夸克的情况。我们确定了u夸克、反d夸克和W玻色子占据任意朗道能级的跃迁选择规则。我们表明，当初始粒子均占据最低朗道能级时，W⁺也会以与磁场对齐的单一偏振态产生于最低朗道能级。我们还通过计算低朗道能级间的跃迁示例阐释了这些一般性结论，并展示了W玻色子的偏振矢量与夸克和反夸克偏振态之间的对应关系。
英文摘要
We compute the leading order modification to the quark-antiquark-$W$-boson vertex in the presence of a constant and uniform magnetic field, specifically for the case where the quark and antiquark are the $u$ and $\bar{d}$, respectively. We find the selection rules for transitions where the $u$, $\bar{d}$, and $W$-boson occupy arbitrary Landau levels. We show that, for the particular case where the initial particles each occupy the lowest Landau level, the $W^+$ is also produced in the lowest Landau level with a single polarization aligned with the magnetic field. We also illustrate the general findings by computing the case of transitions between low lying Landau levels and show the correspondence between the polarization vectors for the $W$-boson and the polarization states for the quark and the antiquark.
