Mass differences among Tcc and hidden charm tetraquarks are predicted with O(10 MeV) precision, yielding m(1+) = 3887.3 ± 7.5 MeV and m(0+) = 3901.9 ± 12.5 MeV when the measured Tcc mass is used as input.
Heavy quark spin symmetry partners of the x (3872),
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$T_{cc}$ and Hidden Charm Tetraquarks $1^+$ and $0^+$in QCD sum rules and Heavy-Quark Spin Symmetry
Mass differences among Tcc and hidden charm tetraquarks are predicted with O(10 MeV) precision, yielding m(1+) = 3887.3 ± 7.5 MeV and m(0+) = 3901.9 ± 12.5 MeV when the measured Tcc mass is used as input.