Fully heavy multiquarks

Abstract

The existence of stable multiquarks made of heavy quarks and antiquarks is discussed in the framework of potential models. It is stressed that the few-body problem should be handled seriously and accurately. No bound state is found within the current models. But resonances are likely present in the spectrum above the lowest threshold.

Comments: Contribution to the 8th Asian-Pacific Few-Body Conference, Kanazawa (Japan), March 2021, to appear in a special issue of Few-Body Systems