Abstract
The goal of the present work is to obtain a reliable estimate of the masses of the ground and radially excited states of fully-heavy tetraquark systems. In order to do this, we use a nonrelativistic model of tetraquarks which are assumed to be compact and consist of diquark-antidiquark pairs. This nonrelativistic model is composed of Hulthen potential, a linear confining potential and spin-spin interaction. We computed ground, first, and second radially excited cc{bar{c}}{bar{c}} and bb{bar{b}}{bar{b}} tetraquark masses. It was found that predicted masses of ground states of cc{bar{c}}{bar{c}} and bb{bar{b}}{bar{b}} tetraquarks are significantly higher than the thresholds of the fall-apart decays to the lowest allowed two-meson states. These states should be broad and are thus difficult to observe experimentally. First radially excited states are considerably lower than their corresponding (2S-2S) two-meson thresholds. We hope that our study may be helpful to the experimental search for ground and excited cc{bar{c}}{bar{c}} and bb{bar{b}}{bar{b}} tetraquark states.
Highlights
Many new a e-mail: hmutuk@omu.edu.tr exotic hadron candidates have been observed by decaying into final states of a charm and anticharm quarks
The physics of exotic hadrons is a thorough piece of research which involves both short and long distance behaviors of QCD
Hadronic molecules are loosely bounded systems together by the exchange of pions and other light mesons. This scenario has received a lot of interest due to the masses of several X Y Z hadrons are very close to the related meson-antimeson thresholds
Summary
Prior to and after these experimental studies, the possible existence of bbbbstate was investigated on the theoretical basis [40,41,42,43,44,45,46,47,48] Motivated with this charm sector observation and a possible open window for fully-bottomed tetraquark states, in the present work we will use a nonrelativistic model to study tetraquarks as composed of diquarks and antidiquarks, which interact much like ordinary quarkonia. The binding mechanism in fully-heavy systems is probably dominated by the gluon-exchange forces since the typical gluon mass scale is mg ∼ 0.5 GeV This mass value is much lighter than the possible force carriers of heavy-mesons that could be exchanged between the heavy diquark (Q Q) and antidiquark (Q Q ) of tetraquark structure.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
