论文标题
建立光$ j^{p（c）} = 1^{ - （+）} $ hybrid nonet
Towards the establishment of the light $J^{P(C)}=1^{-(+)}$ hybrid nonet
论文作者
论文摘要
Besiii合作的观察到轻型混合候选$η_1（1855）$，为促进我们关于轻型风味领域的异国黑龙的知识带来了巨大的机会。我们表明，此观察提供了一个至关重要的线索，用于建立$ j^{p（c）} = 1^{ - （+）} $ hybrid nonet。根据$ j^{p（c）} = 1^{ - （+）} $ hybrid nonet的$ j^{p（c）}的生产和衰减机制，研究了$ j/ψ$辐射衰减中的两个伪cudoscalar mesons。在$ i = 0 $扇区中，我们发现SU（3）风味八位和单线混合不可忽略，并且显然偏离了风味理想混合。由于在$η'$ channel中仅观察到一个Isoscalar $η_1（1855）$的信号，因此我们研究了$η_1（1855）$的两个非ET结构方案，可以是较高或较低的质量状态，可以强烈地伴随$ηh'$。建议检测多重组的可能通道。特别是，对$ j/ψ\ to vh $中的混合产量进行了联合分析，其中$ v $和$ h $为轻矢量介子和$ 1^{ - （+）} $混合状态提供了进一步的证据，可以为这种非ET结构提供进一步的证据，并最终在实验中建立了这些神秘的外来物种。
The observation of the light hybrid candidate $η_1(1855)$ by the BESIII Collaboration brings great opportunities for advancing our knowledges about exotic hadrons in the light flavor sector. We show that this observation provides a crucial clue for establishing the $J^{P(C)}=1^{-(+)}$ hybrid nonet. Based on the flux tube model picture, the production and decay mechanisms for the $J^{P(C)}=1^{-(+)}$ hybrid nonet in the $J/ψ$ radiative decays into two pseudoscalar mesons are investigated. In the $I=0$ sector, we find that the SU(3) flavor octet and singlet mixing is non-negligible and apparently deviates from the flavor ideal mixing. Since only signals for one isoscalar $η_1(1855)$ are observed in the $ηη'$ channel, we investigate two schemes of the nonet structure in which $η_1(1855)$ can be either the higher or lower mass state that strongly couples to $ηη'$. Possible channels for detecting the multiplets are suggested. In particular, a combined analysis of the hybrid production in $J/ψ\to VH$, where $V$ and $H$ stand for the light vector mesons and $1^{-(+)}$ hybrid states, may provide further evidence for this nonet structure and finally establish these mysterious exotic species in experiment.
