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arXiv 2102.12591hep-ph
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动力学双夸克模型中类粲奇异粒子的辐射跃迁

Radiative Transitions of Charmoniumlike Exotics in the Dynamical Diquark Model

Justin M. Gens, Jesse F. Giron, Richard F. Lebed

摘要:

利用动力学双夸克模型,计算了最轻的负宇称奇异候选态$X(3872)$,$J^{PC} \! = \! 1^{--}$(“$Y$“)的电偶极辐射衰变宽度.获得的$O$(100- 1000 keV)值检验了所有这些状态共享的共同子结构的假设。我们还计算了$Z_c(4020)^0 \! \to \! γX(3872)$的磁偶极辐射衰减宽度,发现它比分子模型中的预测值小得多($<$ ~10 keV)。

英文摘要:

Using the dynamical diquark model, we calculate the electric-dipole radiative decay widths to $X(3872)$ of the lightest negative-parity exotic candidates, including the four $I=0$, $J^{PC} \! = \! 1^{--}$ ("$Y$") states. The $O$(100--1000 keV) values obtained test the hypothesis of a common substructure shared by all of these states. We also calculate the magnetic-dipole radiative decay width for $Z_c(4020)^0 \! \to \! γX(3872)$, and find it to be rather smaller ($<$~10 keV) than its predicted value in molecular models.

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