Testing the doubly charged charmstrange tetraquarks
Abstract
The spectroscopic parameters and decay channels of the doubly charged scalar, pseudoscalar and axialvector charmstrange tetraquarks Z_{ \overline{c}s}=[sd][\overline{u} \overline{c}] are explored within framework of the QCD sum rule method. The masses and current couplings of these diquarkantidiquark states are calculated by means of twopoint correlation functions and taking into account the vacuum condensates up to eight dimensions. To compute the strong couplings of Z_{\overline{c}s} states with D, D_{s}, D^{*}, D_{s}^{*}, D_{s1}(2460), D_{s0}^{*}(2317), π and K mesons we use QCD lightcone sum rules and evaluate width of their S and Pwave decays to a pair of negatively charged conventional mesons: For the scalar state Z_{\overline{c}s}→ D_s π , DK, D_{s1}(2460)π , for the pseudoscalar state Z_{\overline{c}s} → D_{s}^{*}π , D^{*}K, D_{s0}^{*}(2317)π , and for the axialvector state Z_{\overline{c}s} → D_{s}^{*}π , D^{*}K, D_{s1}(2460)π decays are investigated. Obtained predictions for the spectroscopic parameters and decay widths of the Z_{\overline{c}s} tetraquarks may be useful for experimental investigations of the doubly charged exotic hadrons.
 Publication:

European Physical Journal C
 Pub Date:
 February 2018
 DOI:
 10.1140/epjc/s1005201856404
 arXiv:
 arXiv:1710.01971
 Bibcode:
 2018EPJC...78..141A
 Keywords:

 High Energy Physics  Phenomenology;
 High Energy Physics  Experiment;
 High Energy Physics  Lattice
 EPrint:
 14 Pages, 4 Figures and 3 Tables. To be published in EPJC