Doubly heavy tetraquarks in the chiral quark soliton model

The chiral quark soliton model has been successfully applied to describe the heavy baryon spectrum, both for charm and bottom, leading to the conclusion that the heavy quark has no effect on the soliton. This suggests that replacing a heavy quark by a heavy antidiquark

\bar{Q} \bar{Q}

in color triplet should give a viable description of heavy tetraquarks. We follow this strategy to compute tetraquark masses. To estimate heavy diquark masses, we use the Cornell potential with appropriately rescaled parameters. The lightest charm tetraquark is 70 MeV above the

D D^{*}

threshold. On the contrary, both nonstrange and strange bottom tetraquarks are bound by approximately 140 and 60 MeV, respectively.

Note:

8 pages, 4 figures, v2 accepted in Phys.Rev. D

tetraquark: mass
color: triplet
diquark: mass
diquark: heavy
baryon: heavy
chiral quark soliton model
heavy quark
charm

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