The doubly charmed pseudoscalar tetraquarks Tcc;s¯s¯++ and Tcc;d¯s¯++

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.