Stable double-heavy tetraquarks: Spectrum and structure

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(JP)=0(1+) in the bbu¯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...

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Bibliographic Details
Main Authors: Q. Meng, E. Hiyama, A. Hosaka, M. Oka, P. Gubler, K.U. Can, T.T. Takahashi, H.S. Zong
Format: Article
Language:English
Published: Elsevier 2021-03-01
Series:Physics Letters B
Subjects:
Double-heavy tetraquark
Quark model
Few-body problem
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269321000356
Description
Summary:Bound states of double-heavy tetraquarks are studied in a constituent quark model. Two bound states are found for isospin and spin-parity I(JP)=0(1+) in the bbu¯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.
ISSN:0370-2693

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