从实验数据确定质子的胶子D项和力学半径
Determination of the Gluonic D-term and Mechanical Radii of Proton from Experimental data
摘要：
我们用一个“色”三极子模型来描述质子的$D$项。通过对矢量介子J/ $ψ$和$ϕ$光生的实验数据在阈值附近的拟合，首次得到了质子的胶子$D$项。对于J/ $ψ$，$D_g(0)$估计为$-2.16\pm0.42$，对于$ϕ$，估计为$-1.31\pm0.48$;对于$ϕ$，质子的机械均方根半径估计为$0.61\pm0.29$ fm，对于J/ $ψ$，估计为$0.42\pm0.11$ fm。
英文摘要：
We apply a "color" tripole ansatz for describing the $D$-term of the proton. By fitting the experimental data of the vector meson J/$ψ$ and $ϕ$ photoproductions near the thresholds, we firstly obtained the gluonic $D$-term of the proton. $D_g(0)$ is estimated to be $-2.16\pm0.42$ for J/$ψ$ and $-1.31\pm0.48$ for $ϕ$, and the mechanical root mean square radius of proton is estimated to be $0.61\pm0.29$ fm for $ϕ$ and $0.42\pm0.11$ fm for J/$ψ$.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
