The 1S states of bb bbar cbar, cc cbar bbar, bb cbar cbar, and bc bbar cbar tetraquarks are predicted to have masses in 16.06-16.14, 9.65-9.74, 12.89-12.94, and 12.75-12.99 GeV with narrow fall-apart decay widths from tenths to several MeV.
It may have sizeable decay rates into the BcB∗ c = B+ c B∗− c + B∗+ c B− c and B∗+ c B∗− c channels with comparable partial widths Γ[T(bc¯b¯c)1+−(12780) → BcB∗ c/ B∗+ c B∗− c ] ≃0
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All-heavy tetraquarks with different flavors
The 1S states of bb bbar cbar, cc cbar bbar, bb cbar cbar, and bc bbar cbar tetraquarks are predicted to have masses in 16.06-16.14, 9.65-9.74, 12.89-12.94, and 12.75-12.99 GeV with narrow fall-apart decay widths from tenths to several MeV.