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arXiv · 1907.01763

Photo-absorption on deuteron contributed by d^*(2380) resonance

Yubing Dong·Pengnian Shen·Zoneye Zhang
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Abstract

In order to understand the possible physical nature of the newly observed resonance $d^*(2380)$, we calculate the real photo-absorption cross section on deuteron contributed by the resonance $d^*(2380)$ by considering the electromagnetic transition amplitude of $\gamma +d\rightarrow d^*(2380)$. In our interpretation, the $d^*(2380)$ is regarded as a compact six-quark system with mainly two components of $\Delta\Delta$ and hidden-color clusters $C_8C_8$. We find that only the next-to-leading terms contribute the $\gamma +d\rightarrow d^*(2380)$ and the obtained photo-absorption cross section is quite small which is in the order of 10 $nb$. Compared with data measured at ELPH and Mainz recently, it is almost about 20 times smaller.

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Yubing Dong, Pengnian Shen, Zoneye Zhang. 2019-07-03. Photo-absorption on deuteron contributed by d^*(2380) resonance. https://doi.org/10.1142/s0217751x19501008

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