论文标题
$ {\ rm {^4he}} $核过渡的原子异常的量子染色体动力学分辨率
Quantum Chromodynamics Resolution of the ATOMKI Anomaly in ${\rm {^4He}}$ Nuclear Transitions
论文作者
论文摘要
从$^{4} $ He，$^{8} $ be和$^{12} $ c nuclei产生的电子 - 词素对异常的角相关的观察结果是由于创建和随后的质量$ \ sim $ \ sim $ 17 MEV的创建和后续衰减。在这项工作中，我们调查了观察到的信号的来源是在$ {\ rm {^4he}} $核波函数中创建的一组新的激发渠道，由12夸克隐藏的颜色状态创建。 $^{4} $ HE，估计其差异和总衰减宽度。我们发现，在激发能量$ \ rm e^{*} = 17.9 \ pm 1 $ meV和电磁衰减的高斯形状尺寸上，我们可以将异常信号的形状与QCD Fock状态拟合。我们使用六夸克状态的属性解决了拟合参数的物理问题，尤其是$ \ rm su（3）_c $ su（3）_c $之间的三个弱令人反感的$ \ rm 6_c $。详细描述了我们模型的实验测试。鉴于这项工作，我们强调需要对Atomki结果进行独立的实验确认或反驳，以及专门的实验，以搜索$ {\ rm ^4He} $的新激发及其他$α$ clustruster nuclei。
Observations of anomalous angular correlations in electron-positron pairs produced from excited states of $^{4}$He, $^{8}$Be and $^{12}$C nuclei have been suggested as due to the creation and subsequent decay of a new light particle of mass $\sim$17 MeV. In this work, we investigate the possibility that the source of the observed signals is a set of new excitation channels created by the 12-quark hidden-color Fock state within the ${\rm {^4He}}$ nuclear wavefunction dubbed the ``hexadiquark.'' We calculate the invariant $e^+e^-$ mass spectrum for the electromagnetic transition from a new excitation of $^{4}$He, estimating its differential and total decay width. We find that we can fit the shape of the anomalous signal with the QCD Fock state at excitation energy $\rm E^{*} = 17.9 \pm 1$ MeV and a Gaussian form factor for the electromagnetic decay. We address the physical issues with the fit parameters using properties of the hexadiquark state, in particular the three weakly repulsive $\rm 6_C$ interactions of $\rm SU(3)_C$ between diquark pairs. Experimental tests of our model are described in detail. In light of this work, we emphasize the need for independent experimental confirmation or refutation of the ATOMKI results as well as dedicated experiments to search for the proposed new excitations of ${\rm ^4He}$ and other $α$-cluster nuclei.
