arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1306.6594hep-phhep-ex
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$J/ψ\to ηh_1 \to ηK^{*0}\bar{K}^{*0}$衰变中$h_1$态的特征

Signature of an $h_1$ state in the $J/ψ\to ηh_1 \to ηK^{*0}\bar{K}^{*0}$ decay

Ju-Jun Xie, M. Albaladejo, E. Oset

摘要:

BES数据的$J/ψ\to ηK^{*0}\bar{K}^{*0}$反应显示了一个明确的增强在$K^{*0}\bar{K}^{*0}$质量分布接近该通道的阈值。这种增强通常是阈值附近的L=0共振的特征,在这种情况下,其将对应于具有量子数$I^G(J^{PC})=0^-(1^{+-})$的$h_1$态。$1800\ \text{MeV}$周围的一个状态是由使用局部隐规范方法的$K^* \bar{K}^*$的相互作用产生的。我们发现,在$J/ψ\to ηK^{*0}\bar{K}^{*0}$中观察到的峰自然来自于这个$h_1$状态的创建,其质量和宽度分别在$1830\ \text{MeV}$和$110\ \text{MeV}$周围。第二个分析,模型无关,证实了第一个结果,确认的关系,在不变的质谱增强与$h_1$共振。

英文摘要:

The BES data on the $J/ψ\to ηK^{*0}\bar{K}^{*0}$ reaction show a clear enhancement in the $K^{*0}\bar{K}^{*0}$ mass distribution close to the threshold of this channel. Such an enhancement is usually a signature of a L=0 resonance around threshold, which in this case would correspond to an $h_1$ state with quantum numbers $I^G(J^{PC})=0^-(1^{+-})$. A state around $1800\ \text{MeV}$ results from the interaction of the $K^* \bar{K}^*$ using the local hidden gauge approach. We show that the peak observed in $J/ψ\to ηK^{*0}\bar{K}^{*0}$ naturally comes from the creation of this $h_1$ state with mass and width around $1830\ \text{MeV}$ and $110\ \text{MeV}$, respectively. A second analysis, model independent, corroborates the first result, confirming the relationship of the enhancement in the invariant mass spectrum with the $h_1$ resonance.

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