Research Information System
European Physical Journal C, vol.83, no.3, 2023 (SCI-Expanded, Scopus)
Spectroscopic parameters and widths of the fully open-flavor axial-vector and pseudoscalar tetraquarks XAV and XPS with content [ud] [c¯ s¯] are calculated by means of the QCD sum rule methods. Masses and current couplings of XAV and XPS are found using two-point sum rule computations performed by taking into account various vacuum condensates up to dimension 10. The full width of the axial-vector state XAV is evaluated by including into analysis S-wave decay modes XAV→ D∗(2010) -K+, D¯ ∗(2007) K, D-K∗(892) +, and D¯ K∗(892). In the case of XPS, we consider S-wave decay XPS→D¯0∗(2300)0K0, and P-wave processes XPS→ D-K∗(892) + and XPS→ D¯ K∗(892). To determine partial widths of these decay modes, we employ the QCD light-cone sum rule method and soft-meson approximation, which are necessary to estimate strong couplings at tetraquark–meson–meson vertices XAVD-D∗(2010) -K+, etc. Our predictions for the mass mAV=(2800±75)MeV and width ΓAV=(58±10)MeV of the tetraquark XAV, as well as results mPS=(3000±60)MeV and ΓPS=(65±12)MeV for the same parameters of XPS may be useful in future experimental studies of multiquark hadrons.