Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Masses of doubly heavy tetraquarks $T_{QQ^\prime}$ in a relativized
  quark model   In the present work, the mass spectra of doubly heavy tetraquarks
$T_{QQ^\prime}$ are systematically investigated in a relativized quark model.
The four-body systems including the Coulomb potential, confining potential,
spin-spin interactions, and relativistic corrections are solved within the
variational method. Our results suggest that the $IJ^P=01^+$ $bb \bar u \bar d$
state is 54 MeV below the relevant $\bar B \bar B$ and $\bar B \bar B^*$
thresholds, which indicates that both strong and electromagnetic decays are
forbidden, and thus this state can be a stable one. Its large hidden color
component and small root mean square radius demonstrate that it is a compact
tetraquark rather than a loosely bound molecule or point-like
diquark-antidiquark structure. Our predictions of the doubly heavy tetraquarks
may provide valuable information for future experimental searches.

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The categories of this paper are: math
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The categories of this paper are: solv-int
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The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
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The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
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The categories of this paper are: cond-mat
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The categories of this paper are: comp-gas
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The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: physics
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The categories of this paper are: math-ph
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The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph