Stable double-heavy tetraquarks: spectrum and structure
Nuclear Theory
2021-01-27 v1
Abstract
Bound states of double-heavy tetraquarks are studied in a constituent quark model. Two bound states are found for isospin and spin-parity I(J^P ) = 0(1^+) in the bb\bar{u}\bar{d} channel. One is deeply bound and compact made of colored diquarks, while the other is shallow and extended as a BB^* molecule. The former agrees well with lattice QCD results. A systematic decrease in the binding energy is seen by replacing one of the heavy quarks to a lighter one. Altogether we find ten bound states. It is shown for the first time that hadrons with totally different natures emerge from a single Hamiltonian.
Keywords
Cite
@article{arxiv.2009.14493,
title = {Stable double-heavy tetraquarks: spectrum and structure},
author = {Q. Meng and E. Hiyama and A. Hosaka and M. Oka and P. Gubler and K. U. Can and T. T. Takahashi and H. S. Zong},
journal= {arXiv preprint arXiv:2009.14493},
year = {2021}
}