Abstract
The mass and coupling of the doubly charmed JP=0− diquark–antidiquark states Tcc;s¯s¯++ and Tcc;d¯s¯++ that bear two units of the electric charge are calculated by means of QCD two-point sum rule method. Computations are carried out by taking into account vacuum condensates up to and including terms of tenth dimension. The dominant S-wave decays of these tetraquarks to a pair of conventional Ds+Ds0⁎+(2317) and D+Ds0⁎+(2317) mesons are explored using QCD three-point sum rule approach, and their widths are found. The obtained results mT=(4390±150)MeVandΓ=(302±113MeV) for the mass and width of the state Tcc;s¯s¯++, as well as spectroscopic parameters m˜T=(4265±140)MeV and Γ˜=(171±52)MeV of the tetraquark Tcc;d¯s¯++ may be useful in experimental studies of exotic resonances.
Highlights
The investigation of exotic mesons, i.e. particles either with unusual quantum numbers that are not accessible in the quark–antiquark qq model or built of four valence quarks remains among interesting and important topics in high energy physics
Agaev et al / Nuclear Physics B 939 (2019) 130–144 hadrons does not contradict to first principles of QCD and was theoretically predicted already by different authors [1,2,3]
X(3872) by Belle Collaboration in 2003 [4] the exotic hadrons became an object of rapidly growing studies
Summary
The investigation of exotic mesons, i.e. particles either with unusual quantum numbers that are not accessible in the quark–antiquark qq model or built of four valence quarks (tetraquarks) remains among interesting and important topics in high energy physics. The masses of the doubly charged exotic mesons built of four different quark flavors were extracted from QCD sum rules in Ref.
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