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arXiv 0812.0628hep-phhep-exnucl-th
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来自V->Pgamma和J/psi-> VP衰变的η-η '混合

Eta-eta' mixing from V->Pgamma and J/psi->VP decays

Rafel Escribano

备注：
8 pages, uses appolb style. Talk presented at the Symposium on Meson Physics, Cracow, Poland, 1-4 October 2008
发表信息：
Acta Phys.Polon.Supp.2:71-78,2009
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摘要：

通过对$V\to Pγ$和$J/ψ\to VP$衰变的唯象分析，导出了$η$ - $η^\prime$赝标混合角和$η^\prime$介子的胶子含量.在没有胶子的情况下，夸克味基中的混合角的值被发现是来自$V\to Pγ$的$ϕ_P=(41.5\pm 1.2)^\circ$和来自$J/ψ\to VP$的$ϕ_P=(40.5\pm 2.4)^\circ$。在存在胶子的情况下，$η^\prime$波函数的混合角和胶子含量的值分别为$V\to Pγ$的$ϕ_P=(41.4\pm 1.3)^\circ$和$Z^2_{η^\prime}=0.04\pm 0.09$，以及$J/ψ\to VP$的$ϕ_P=(44.5\pm 4.3)^\circ$和$Z^2_{η^\prime}=0.28\pm 0.21$。

英文摘要：

The $η$-$η^\prime$ pseudoscalar mixing angle and the gluonium content of the $η^\prime$ meson are deduced from an updated phenomenological analysis of $V\to Pγ$ and $J/ψ\to VP$ decays. In absence of gluonium, the value of the mixing angle in the quark-flavour basis is found to be $ϕ_P=(41.5\pm 1.2)^\circ$ from $V\to Pγ$ and $ϕ_P=(40.5\pm 2.4)^\circ$ from $J/ψ\to VP$. In presence of gluonium, the values for the mixing angle and the gluonic content of the $η^\prime$ wave function are $ϕ_P=(41.4\pm 1.3)^\circ$ and $Z^2_{η^\prime}=0.04\pm 0.09$ from $V\to Pγ$ and $ϕ_P=(44.5\pm 4.3)^\circ$ and $Z^2_{η^\prime}=0.28\pm 0.21$ from $J/ψ\to VP$, respectively.

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