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

Abstract

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