Stable double-heavy tetraquarks: spectrum and structure
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^* mole...
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| creator | Meng, Q Hiyama, E Hosaka, A Oka, M Gubler, P Can, K U Takahashi, T T Zong, H S |
| description | 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. |
| doi_str_mv | 10.48550/arxiv.2009.14493 |
| format | Article |
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| subjects | Hadrons Physics - Nuclear Theory Quantum chromodynamics Quark models Quarks |
| title | Stable double-heavy tetraquarks: spectrum and structure |
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