Magnetic dipole moment of the $Z_{cs}(3985)$ state: diquark-antidiquark and molecular pictures

TL;DR

This paper calculates the magnetic dipole moment of the $Z_{cs}(3985)^-$ state using light cone QCD in both diquark-antidiquark and molecular models, providing predictions accessible to experimental verification.

Contribution

It offers the first estimation of the magnetic dipole moment of the $Z_{cs}(3985)^-$ state in two different theoretical frameworks using light cone QCD.

Findings

Results are consistent between the two models within errors.

Magnetic dipole moment magnitude suggests experimental measurability.

Provides theoretical predictions for future experimental tests.

Abstract

We calculate the magnetic dipole moment of the newly observed charged hidden-charmed open strange $ Z_{cs}(3985)^- $ state, recently observed by BESIII Collaboration. Based on the information provided by the experiment and theoretical studies followed the observation, we assign the quantum numbers $ J^{P} = 1^{+}$ and the quark composition $ c \bar c s\bar u $ to this state and estimate the magnetic dipole moment of this resonance in both the compact diquark-antidiquark and molecular pictures. We apply the light cone QCD formalism and use the distribution amplitudes of the on-shell photon with different twists. The obtained results in both pictures are consistent with each other within the errors. The magnitude of the magnetic dipole moment shows that it is accessible in the experiment.