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

Agaev, S.S. (Institute for Physical Problems, Baku State University, Baku, Az-1148, Azerbaijan) ; Azizi, K.  (Department of Physics, Doǧuş University, Acibadem-Kadiköy, Istanbul, 34722, Turkey) ; Barsbay, B. (Department of Physics, Kocaeli University, Izmit, 41380, Turkey) ; Sundu, H. (Department of Physics, Kocaeli University, Izmit, 41380, Turkey)

21 December 2018

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.

Published in: Nuclear Physics B 939 (2019) 130-144
Published by: Elsevier
DOI: 10.1016/j.nuclphysb.2018.12.021
License: CC-BY-3.0

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