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arXiv · 1905.12803

Axial Vector $cc$ and $bb$ Diquark Masses from QCD Laplace Sum-Rules

S. Esau·A. Palameta·R. T. Kleiv·D. Harnett·T. G. Steele
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Abstract

Constituent mass predictions for axial vector (i.e., $J^P=1^+$) $cc$ and $bb$ colour antitriplet diquarks are generated using QCD Laplace sum-rules. We calculate the diquark correlator within the operator product expansion to NLO, including terms proportional to the four- and six-dimensional gluon and six-dimensional quark condensates. The sum-rules analyses stabilize, and we find that the mass of the $cc$ diquark is 3.51~GeV and the mass of the $bb$ diquark is 8.67~GeV. Using these diquark masses as inputs, we calculate several tetraquark masses within the Type-II diquark-antidiquark tetraquark model.

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S. Esau, A. Palameta, R. T. Kleiv, D. Harnett, T. G. Steele. 2019-10-17. Axial Vector $cc$ and $bb$ Diquark Masses from QCD Laplace Sum-Rules. https://doi.org/10.1103/physrevd.100.074025

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