NSTAR24

An Interpretation of d*(2380) with a chiral constituent quark model (20+5)

Jun 20, 2024, 2:50 PM

25m

Jorvik Suite (Hilton Hotel York)

Parallel Session

Speaker

Yubing Dong (Institute of High Energy Physics, Chinese Academy of Sciences)

Description

A theoretical interpretation of d(2380)(Jp=3+), which was observed by WASA@COSY collaboration, is given [1]. This dibaryon structure is studied on the quark-gluon degrees of freedom with a SU(3) chiral constituent quark model and Resonating Group Method. Its mass and wave function are evaluated using a couple channel calculation with  and C8C8 channels. It is found that the hidden-color component C8C8 is dominant in its wave function. Moreover, its partial widths of almost all possible strong decays are also computed and the obtained results agree with the data well. Our study suggests that d(2380) may be assigned as a compact hexaquark system with significant hidden-color component. In addition, the electromagnetic characteristics of this 3+ dibaryon state, such as the charge distribution, charge radius, multipole moments, and etc. are further studied. We believe that those observables can be used as additional physical quantities to distinguish the different interpretations. Finally, the production of d*(2380) at forthcomingPanda is also estimated.

[1] Yubing Dong, Pengnian Shen, and Zongye Zhang, “d*(2380) in a chiral constituent quark model”, Prog. Part. Ncul. Phys. 131 (2023), 104045.

Presentation materials

DYB(2024_06.20).pdf