Abstract
The strong decays of the pseudoscalar and scalar double-charmed tetraquarks and are investigated in the framework of the QCD sum rule method. The mass and coupling of these exotic four-quark mesons are calculated in the framework of the QCD two-point sum rule approach by taking into account vacuum condensates of the quark, gluon, and mixed local operators up to dimension 10. Our results for masses and demonstrate that these tetraquarks are strong-interaction unstable resonances and decay to conventional mesons through the channels , and . Key quantities necessary to compute the partial width of these decay modes, i.e., the strong couplings of two mesons and a corresponding tetraquark , , 2, and , are extracted from the QCD three-point sum rules. The full width demonstrates that the tetraquark is a broad resonance, whereas the scalar exotic meson with can be classified as a relatively narrow state.
- Received 11 May 2019
DOI:https://doi.org/10.1103/PhysRevD.99.114016
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society