XYZ - SU3 Breakings from Laplace Sum Rule at Higher Orders: Summary

Understand

This talk reviews and summarizes some of our results in [1] on XYZ- SU3 Breakings obtained from QCD Laplace Sum Rules (LSR) at next-to-next-leading order (N2LO) of perturbative (PT) theory and including next-to-leading order (NLO) SU3 breaking corrections and leading order (LO) contributions of dimensions d< (6 - 8) non-perturbative condensates.

• We conclude that the observed X states are good candidates for being 1^++ and 0^++ molecules states.
• We find that the SU3 breakings are relatively small for the masses (< 10 (resp.
• 3) %) for the charm (resp.