# Spectroscopy and decays of the fully-heavy tetraquarks

The European Physical Journal C, Aug 2018

We discuss the possible existence of the fully-heavy tetraquarks. We calculate the ground-state energy of the $$bb {\bar{b}} {\bar{b}}$$ bound state, where b stands for the bottom quark, in a nonrelativistic effective field theory framework with one-gluon-exchange (OGE) color Coulomb interaction, and in a relativized diquark model characterized by OGE plus a confining potential. Our analysis advocates the existence of uni-flavor heavy four-quark bound states. The ground state $$bb{\bar{b}}{\bar{b}}$$ tetraquark mass is predicted to be $$(18.72\pm 0.02)$$ GeV. Mass inequality relations among the lowest $$QQ\bar{Q}\bar{Q}$$ states, where $$Q\in \{c, b\}$$, and the corresponding heavy quarkonia are presented, which give the upper limit on the mass of ground state $$QQ\bar{Q}\bar{Q}$$. The possible decays of the lowest $$bb\bar{b}\bar{b}$$ are highlighted, which might provide useful references in the search for them in ongoing LHC experiments, and its width is estimated to be a few tens of MeV.

This is a preview of a remote PDF: https://link.springer.com/content/pdf/10.1140%2Fepjc%2Fs10052-018-6073-9.pdf

Muhammad Naeem Anwar, Jacopo Ferretti, Feng-Kun Guo, Elena Santopinto, Bing-Song Zou. Spectroscopy and decays of the fully-heavy tetraquarks, The European Physical Journal C, 2018, 647, DOI: 10.1140/epjc/s10052-018-6073-9