论文标题
对$ \ bar {p} p $ - ，$π^ - p $ - 和$ππ$ -DATA的耦合通道分析的最轻的混合介子候选人的调查
Investigation of the Lightest Hybrid Meson Candidate with a Coupled-Channel Analysis of $\bar{p}p$-, $π^- p$- and $ππ$-Data
论文作者
论文摘要
提出了结合不同过程的复杂耦合通道分析：$π^0π^0η$，$π^0η$和$ k^+k^+k^-π^0 $来自$ \ bar {p} p} p $ andihilations，p $ andihilitation来自$ππ$散布反应的数据。因此，我们的分析结合了两个独立的先前分析中使用的数据集，由Crystal Barrel实验和JPAC组发表。基于这些研究的新见解，本文旨在更好地理解轻型 - 梅森领域中的自旋渗透$π_1$的共振。通过利用K-Matrix方法并通过Chew-Mandelstam函数实现分析性，可以通过单个$π_1$ POL（两个系统，$πη$和$πη$和$πη^\ prime $）很好地描述旋转波动的振幅。 $π_1$ -pole的质量和宽度被测量为$（1623 \，\ pm \，47 \， ^{+24} _ { - 75} \，）\，\ Mathrm {Mev/c} ^2 $ and $ ^{+144} _ { - 175} \，）\，\ mathrm {mev} $。
A sophisticated coupled-channel analysis is presented that combines different processes: the channels $π^0π^0η$, $π^0ηη$ and $K^+K^-π^0$ from $\bar{p}p$ annihilations, the P- and D-wave amplitudes of the $πη$ and $πη^\prime$ systems produced in $π^- p$ scattering, and data from $ππ$-scattering reactions. Hence our analysis combines the data sets used in two independent previous analyses published by the Crystal Barrel experiment and by the JPAC group. Based on the new insights from these studies, this paper aims at a better understanding of the spin-exotic $π_1$ resonances in the light-meson sector. By utilizing the K-matrix approach and realizing the analyticity via Chew-Mandelstam functions the amplitude of the spin-exotic wave can be well described by a single $π_1$ pole for both systems, $πη$ and $πη^\prime$. The mass and width of the $π_1$-pole are measured to be $(1623 \, \pm \, 47 \, ^{+24}_{-75}\,)\, \mathrm{MeV/c}^2$ and $(455 \, \pm \, 88 \, ^{+144}_{-175}\,)\, \mathrm{MeV}$.
