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arXiv 1408.2291hep-ph
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$\bar{p}p$极化碰撞引起的粲偶素$^3D_3$态辐射衰变的角分布

Angular distributions in the radiative decays of the $^3D_3$ state of charmonium originating from polarized $\bar{p}p$ collisions

Cheuk-Ping Wong, Alex W. K. Mok, Wai-Yu Sit

备注：
arXiv admin note: substantial text overlap with arXiv:1311.4642
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摘要：

利用螺旋度理论，计算了三重级联过程$\bar{p}p\rightarrow{}^3D_3\rightarrow{}^3P_2+γ_1\rightarrow(ψ+γ_2) +γ_1 \rightarrow (e^- + e^+) +γ_2 +γ_1$中，当$\bar{p}$和$p$任意极化时，两个γ光子（$γ_1$和$γ_2$）和电子（$e^-$）的组合角分布函数.我们还导出了六种不同的部分积分角分布函数，它们给出了末态中一个或两个粒子的角分布。结果表明，通过测量$γ_1$和$γ_2$以及$γ_2$和$e^-$的两粒子角分布，可以确定粲偶素辐射跃迁${}^3D_3\rightarrow{}^3P_2+γ_1$和$^3P_2\rightarrow ψ+γ_2$中所有螺旋度振幅的相对大小和相对相位.

英文摘要：

Using the helicity formalism, we calculate the combined angular distribution function of the two gamma photons ($γ_1$ and $γ_2$) and the electron ($e^-$) in the triple cascade process $\bar{p}p\rightarrow{}^3D_3\rightarrow{}^3P_2+γ_1\rightarrow(ψ+γ_2) +γ_1 \rightarrow (e^- + e^+) +γ_2 +γ_1$, when $\bar{p}$ and $p$ are arbitrarily polarized. We also derive six different partially integrated angular distribution functions which give the angular distributions of one or two particles in the final state. Our results show that by measuring the two-particle angular distribution of $γ_1$ and $γ_2$ and that of $γ_2$ and $e^-$, one can determine the relative magnitudes as well as the relative phases of all the helicity amplitudes in the two charmonium radiative transitions ${}^3D_3\rightarrow{}^3P_2+γ_1$ and $^3P_2\rightarrow ψ+γ_2$.

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。

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