Charmoniumlike resonant explanation on the newly observed X(3960)
Rui Chen, Qi Huang
Abstract
Motivated by the recent observation of X(3960) by the LHCb collaboration, we adopt the one-boson-exchange model to study the DsD¯s/D⁎D¯⁎/Ds⁎D¯s⁎ interactions with I(JPC)=0(0++) after considering both the S−D wave mixing effects and the coupled channel effects. Our analysis yields the phase shifts for these coupled channel systems, and indicate the existence of a charmoniumlike resonance, whose mass and width align well with the experimental data for the newly discovered X(3960). Furthermore, our investigation reveals the significant role played by the D⁎D¯⁎ system in the formation of the X(3960) resonance, and the Ds⁎D¯s⁎ system notably contributes to the resonance's width. As a byproduct, we perform a coupled channel analysis on the D⁎D¯⁎/DsD¯s⁎/Ds⁎D¯s⁎ interactions with I(JPC)=0(1+−), our results can predict the existence of a DsD¯s⁎ molecule with 1+− and another Ds⁎D¯s⁎ molecule with 1+−. Their widths are around several and several to several tens MeV, respectively. We encourage experimental investigations to search for these two possible charmoniumlike molecular candidates, as such findings would serve to validate our research findings and proposals.